17 · Body & interior

Seats

Make: Ford
Model: Freestar Factory Service Manual
Year: 2007
Section: 501-10 Seating › Diagnosis and testing › Seats

BodySeats

Seats

Section 501-10 · Diagnosis and testing · revised 04/27/2006

Special Tool(s)
	73III Automotive Meter 105-R0057 or equivalent
	Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
	Diagnostic Tool, Restraint System (2 required) 501-097
	Diagnostic Tool, Restraint System (2 required) 418-133

Restraint System Diagnostic Tool Warning

WARNING: The restraint system scan tools are for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.

Principles of Operation

Driver Power Seat

The driver power seat motors are hardwired to the driver seat control switch. The circuits are normally at ground through the seat control switch. The individual circuit is switched to power when the specific adjustment position is selected.

Driver Power Seat — Memory

NOTE: Before carrying out diagnostic testing for the driver seat module (DSM) wake the module by activating the power seat using the seat control switch, otherwise module communication failure will occur.

The driver power seat is controlled by the driver seat module (DSM). The DSM does not need to be configured, however the driver seat does need to be calibrated when the DSM is installed. The driver seat control switch provides voltage to the DSM when activated. The NEUTRAL position of each driver seat control switch position is a ground state through the seat control switch contacts. A voltage input causes the DSM to power the appropriate motor until the input is removed. Ground is the normal state of the motor circuits through the DSM and is not switched to control the motors. The DSM internally switches the appropriate line from ground to power to adjust the motors.

As the seat is adjusted, the DSM constantly monitors the motor position sensors to record the current seat position. The DSM will remove power from the motor upon termination of the seat control switch input or if the DSM does not see movement from the motor by monitoring the position sensor. The DSM must be calibrated to the seat track it is controlling. Refer to Seat Calibration. Once the DSM is calibrated to the seat track, it will only allow movement within the calibrated range.

Seat Calibration

The driver seat module (DSM) is calibrated using a scan tool. The calibration procedure automatically powers the driver power seat through its full range of motion and records the full stop positions by monitoring the motor position sensors. Once the full stop positions or range of the seat have been recorded, the DSM will only operate within the calibrated range. Any input attempting to drive the seat beyond the calibrated range will be ignored. This calibration is used for all seat control functions including manual switch control and memory recall positioning. During the seat calibration, the DSM may identify a function that is inoperative, such as a position sensor not changing. If the DSM identifies a concern that has a related diagnostic trouble code (DTC), the DSM will set the related DTC at the end of the validation procedure.

Passenger Power Seat

The passenger power seat motors are hardwired to the passenger seat control switch. The circuits are normally at ground through the seat control switch. The individual circuit is switched to power when the specific adjustment position is selected.

Heated Seats

The driver and passenger heated seat modules share a common battery feed and ground source and have a separate ignition feed. The electronic automatic temperature control (EATC) module includes the heated seat control buttons and indicators. The heated seat system will function when the EATC module is ON or OFF. When a heated seat control button on the EATC module is pressed with the ignition switch in RUN or START, a momentary ground signal is sent to the heated seat module. Upon receiving a signal, the heated seat module will decrease one setting (the sequence is HI, LO, OFF, HI, etc.). When a heated seat is set to HI, both LED indicators above the heated seat control button will illuminate. When a heated seat is set to LO, only the left LED indicator will illuminate. When a heated seat is set to OFF, neither LED will be illuminated. Refer to Section 412-00.

When the heated seat system is ON, the heated seat module then supplies power to the heater mat circuit. The cushion heater mat and backrest heater mat are wired in series and powered by the same output. The heated seat module will remain on until the heated seat control button is pressed to cycle the heated seat module to the OFF state. If the ignition source is removed from the module, the heated seat module will enter an OFF state and will not return to ON until the heated seat control button is once again pressed with the ignition switch in RUN. The heated seat module is designed to heat the seat to 37.5ºC (99.5ºF) in LO setting and 42°C (107.6°F) in HI setting and maintain the temperature until switched off. This temperature is maintained by the heated seat module monitoring the temperature sensor, located in the seat cushion heater mat and adjusting the current flow to the heater mats.

Climate Controlled Seat System

NOTE: When installing a new climate control seat module (CCSM), it is necessary to carry out programmable module installation (PMI). Refer to Section 418-01.

The climate controlled seat system is able to heat and cool the front seats. Each climate controlled front seat is controlled by buttons located on the electronic automatic temperature control (EATC) module.

Both the driver and front passenger seat has an independent climate controlled seat system installed. A climate controlled seat module mounted to the bottom of the seat cushion electronically controls the climate controlled seat system. The climate controlled seat system receives power from both the battery power and vehicle run circuits. The vehicle must have ignition ON and the EATC module switch set to HEAT or COOL 1, 2, 3 or AUTO for the climate controlled seat system to activate.

AUTO mode is achieved by pressing the HEAT and COOL settings simultaneously. The center LED will be illuminated when the CCSM is in AUTO mode.

Cabin air is drawn through the seat fan motor and distributed to each of the thermo-electric device (TED) modules located in the seat cushion and backrest. The TEDs then heat or cool the air. The air is then directed into the foam pad B-surface. Channels in the A-surface of the foam pad are used to distribute the air along the surface of the seat.

The TED uses a "Peltier" circuit of P-type and N-type semiconductors connected in series using copper electrical conductors. The semiconductors are sandwiched between 2 insulating ceramic plates. When current is applied to the TED, one side releases energy as heat, while the opposite side absorbs energy and gets cold. By reversing the current flow, the hot and cold sides reverse.

The temperature differences between the individual HEAT and COOL settings is minimal. For example, it is difficult to distinguish between LOW COOL and MEDIUM COOL settings. Monitoring the seat temperature at different HEAT or COOL settings should not be done as it is ineffective in confirming climate controlled seat system operation.

Heating Characteristics

NOTE: The presence of overtemp faults (DTCs B2729 and B2730) can be induced by incorrect operation of the climate controlled seat system after an initial HEAT setting has been attained. If a HEAT setting is repeatedly turned OFF and ON in an attempt to increase the seat temperature, an overtemp condition can result and the DTC(s) will be set.

The climate controlled seat system draws approximately 7.5 amps until reaching the set point and then the system draws approximately 2 amps to maintain the climate setting.
In HEAT mode, the thermo-electric device (TED) can add up to 40-60°C (72-108°F) to the ambient air temperature entering the system.
There are 3 manual settings based on the position of the climate controlled seat switch on the EATC module. Position 1 is the LOW setting and position 3 is the HIGH setting.
There are 5 AUTO HEAT settings. The AUTO HEAT setting is determined by the temperature setting of the EATC module when the climate control seat module (CCSM) is in AUTO HEAT mode.
In the LOW setting, the climate controlled seat module is set to maintain TED temperature at 37°C (99°F).
In the HIGH setting, the climate controlled seat module is set to maintain TED temperature at 65°C (149°F).
If the temperature at one of the TEDs rises above 85°C (185°F) in the HEAT mode or 70°C (149°F) in the COOL mode for more than 4 seconds, the CCSM will record an overtemp DTC, remove power from the TEDs and go into "Blower Only" mode in an attempt to cool down the TEDs. If the TED temperature has not dropped to 80°C (176°F) in the HEAT mode or 65°C (140°F) in the COOL mode after 30 seconds, the CCSM will shut down and remain off until the ignition is cycled. Also if the CCSM detects an overtemp twice during the same ignition cycle, it will also shut down.
In HEAT mode, there is no linear correlation between the EATC module, the seat fan motor speed and the TED supply voltage. The CCSM will independently vary the fan speed and the TED supply voltage in order to reach and maintain the temperature determined by the EATC module setting.

Cooling Characteristics

The climate controlled seat system draws approximately 4.5 amps for the first 12 minutes and will operate at 2 amps thereafter.
In COOL mode, the thermo-electric device (TED) can remove up to 8°C (14°F) from the ambient air temperature entering the system.
There are 3 manual settings based on the position of the climate controlled seat switch on the EATC module. Position 1 is the LOW setting and position 3 is the HIGH setting.
If the temperature at one of the TEDs goes below 18°C (64°F), the climate controlled seat module will shut down the TEDs. If the temperature continues to drop below 12°C (54°F), the climate controlled seat module will shut down the fan motor.
In COOL mode, there is a correlation between the seat fan motor speed and the TED supply voltage.

Climate Controlled Seat Switch Setting^a	Seat Fan Motor Supply Voltage	Thermo- Electric Device Supply Duty Cycle
Manual 1 or Auto 1	7 volts	0%
Auto Mode 2	7 volts	49%
Manual 2 or Auto 3	7 volts	77%
Auto Mode 4	7.7 volts	100%
Manual 3 or Auto 5	8 volts	100%

^a Auto settings are determined by the temperature settings of the EATC module and cannot be manually selected.

The climate controlled seat system is deactivated by one of the following actions:

Setting the EATC module setting to manual OFF.
Turning the vehicle OFF.

Inspection and Verification

Verify the customer concern by operating the system.

Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart
Mechanical	Electrical
Front seat track motors Front seat track binding or obstructed Climate controlled seat ducts Dirty or obstructed climate controlled seat fan motor filter	Bussed electrical center (BEC) fuse(s): 11 (30A) 15 (30A) 51 (10A) Smart junction box (SJB) fuse 13 (5A) Seat control switch Memory set switch Seat fan motor Thermo-electric device (TED) Climate controlled seat module (CCSM) Heated seat module Seat cushion heater mat Seat backrest heater mat Driver seat module (DSM) Loose or corroded connections Seat wire harness cut or frayed

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the concern is with the power seat (non-memory seat) or heated seat and the cause is not visually evident, verify the symptom and GO to Symptom Chart.
NOTE: Before carrying out diagnostic testing for the driver seat module (DSM) wake the module by activating the power seat using the seat control switch, otherwise module communication failure will occur.

NOTE: Make sure to use the latest scan tool software release.
If the concern is with the memory seat or climate controlled seat and the cause is not visually evident, connect the scan tool to the data link connector (DLC).
NOTE: The vehicle communication module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.
If the scan tool does not communicate with the VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to Section 418-00, No power to the scan tool, to diagnose no communication with the scan tool.
If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to Section 418-00 to diagnose no response from the powertrain control module (PCM).
Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to Section 418-00.
- If the network test passes, retrieve and record continuous memory diagnostic trouble codes (DTCs).
Clear the continuous DTCs and carry out the self-test diagnostics for the driver seat module (DSM) or climate controlled seat module (CCSM).
If the DTCs retrieved are related to the concern, go to Driver Seat Module (DSM) Diagnostic Trouble Code (DTC) Index or Climate Controlled Seat Module (CCSM) Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to Section 419-10.
If no DTCs related to the concern are retrieved, GO to Symptom Chart.

Driver Seat Module (DSM) Diagnostic Trouble Code (DTC) Index
DTC	Description	Source	Action
B1342	ECU is Faulted	DSM	INSTALL a new DSM. REFER to Section 419-10.
B1530	Memory Set Switch Circuit Short to Ground	DSM	Go To Pinpoint Test I.
B1534	Memory 1 Switch Circuit Short to Ground	DSM	Go To Pinpoint Test I.
B1538	Memory 2 Switch Circuit Short to Ground	DSM	Go To Pinpoint Test I.
B1663	Seat Driver Front Up/Down Motor Stalled	DSM	If the motor does not operate, Go To Pinpoint Test H. If motor operates, Go To Pinpoint Test I.
B1664	Seat Driver Rear Up/Down Motor Stalled	DSM	If the motor does not operate, Go To Pinpoint Test H. If motor operates, Go To Pinpoint Test I.
B1665	Seat Driver Forward/Backward Motor Stalled	DSM	If the motor does not operate, Go To Pinpoint Test H. If motor operates, Go To Pinpoint Test I.
B1667	Mirror Driver Up/Down Motor Stalled	DSM	REFER to Section 501-09.
B1668	Mirror Driver Right/Left Motor Stalled	DSM	REFER to Section 501-09.
B1669	Mirror Passenger Up/Down Motor Stalled	DSM	REFER to Section 501-09.
B1670	Mirror Passenger Right/Left Motor Stalled	DSM	REFER to Section 501-09.
B1676	Battery Voltage Out of Range	DSM	REFER to Section 414-00.
B1711	Seat Driver Front Up Switch Circuit Short to Battery	DSM	Go To Pinpoint Test H.
B1715	Seat Driver Front Down Switch Circuit Short to Battery	DSM	Go To Pinpoint Test H.
B1719	Seat Driver Forward Switch Circuit Short to Battery	DSM	Go To Pinpoint Test H.
B1723	Seat Driver Rearward Switch Circuit Short to Battery	DSM	Go To Pinpoint Test H.
B1727	Seat Driver Rear Up Switch Circuit Short to Battery	DSM	Go To Pinpoint Test H.
B1731	Seat Driver Rear Down Switch Circuit Short to Battery	DSM	Go To Pinpoint Test H.
B1735	Mirror Driver Vertical Switch Circuit Short to Battery	DSM	REFER to Section 501-09.
B1739	Mirror Driver Horizontal Switch Circuit Short to Battery	DSM	REFER to Section 501-09.
B1743	Mirror Passenger Vertical Switch Circuit Short to Battery	DSM	REFER to Section 501-09.
B1747	Mirror Passenger Horizontal Switch Circuit Short to Battery	DSM	REFER to Section 501-09.
B1950	Seat Rear Up/Down Feedback Potentiometer Circuit Failure	DSM	Go To Pinpoint Test I.
B1952	Seat Rear Up/Down Feedback Potentiometer Circuit Short to Battery	DSM	Go To Pinpoint Test I.
B1954	Seat Front Up/Down Feedback Potentiometer Circuit Failure	DSM	Go To Pinpoint Test I.
B1956	Seat Front Up/Down Feedback Potentiometer Circuit Short to Battery	DSM	Go To Pinpoint Test I.
B1962	Seat Horizontal Forward/Rearward Feedback Potentiometer Circuit Failure	DSM	Go To Pinpoint Test I.
B1964	Seat Horizontal Forward/Rearward Feedback Potentiometer Circuit Short to Battery	DSM	Go To Pinpoint Test I.
B1987	Pedal Forward/Rearward Motor Stalled	DSM	REFER to Section 206-00.
B1988	Pedal Position Forward Switch Circuit Short to Ground	DSM	REFER to Section 206-00.
B1989	Pedal Position Rearward Switch Circuit Short to Ground	DSM	REFER to Section 206-00.
B1990	Pedal Forward/Rearward Feedback Potentiometer Circuit Failure	DSM	REFER to Section 206-00.
B1991	Pedal Forward/Rearward Feedback Potentiometer Circuit Short to Battery	DSM	REFER to Section 206-00.
B2312	Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure	DSM	REFER to Section 501-09.
B2314	Mirror Passenger Horizontal Feedback Potentiometer Short to Battery	DSM	REFER to Section 501-09.
B2316	Mirror Passenger Vertical Feedback Potentiometer Circuit Failure	DSM	REFER to Section 501-09.
B2318	Mirror Passenger Vertical Feedback Potentiometer Short to Battery	DSM	REFER to Section 501-09.
B2320	Mirror Driver Horizontal Feedback Potentiometer Circuit Failure	DSM	REFER to Section 501-09.
B2322	Mirror Driver Horizontal Feedback Potentiometer Short to Battery	DSM	REFER to Section 501-09.
B2324	Mirror Driver Vertical Feedback Potentiometer Circuit Failure	DSM	REFER to Section 501-09.
B2326	Mirror Driver Vertical Feedback Potentiometer Short to Battery	DSM	REFER to Section 501-09.
B2477	Module Configuration Failure	DSM	INSTALL a new DSM. REFER to Section 419-10.
U1950	UBP Communication Bus Fault	DSM	CHECK circuit 2077 (PK/LB) for an open connection between DSM C341c-2 and DLC C251-3 and for a short to ground or voltage. REPAIR as needed. If okay, CHECK the UBP bus for communication. REFER to Section 418-00. If the DSM and UBP bus communication is OK, CONFIGURE the DSM and RETEST. REFER to Section 418-01. If the DSM will not configure correctly or the DTC returns, INSTALL a new DSM. REFER to Section 419-10.
U2306	UBP Invalid Data	DSM	CHECK circuit 2077 (PK/LB) for poor connection between DSM C341c-2 and DLC C251-3 and for a short to ground or voltage. REPAIR as needed. If okay, CHECK the UBP bus for communication. REFER to Section 418-00. If the DSM and UBP bus communication is OK, CONFIGURE the DSM and RETEST. REFER to Section 418-01. If the DSM will not configure correctly or the DTC returns, INSTALL a new DSM. REFER to Section 419-10.
U2471	Unexpected PRNDL State	DSM	CHECK the PRNDL for PARK position. If okay, CHECK the DSM transmission switch input status PID value for PARK/NEUTRAL. If the PID value is incorrect, CHECK circuit 1434 (LB/PK) for a fault between DSM C341d-17 and SJB C2280d-19. CHECK for SJB DTC B2066 or B2067. If present, REFER to Section 307-01. CLEAR the DTC. REPEAT the selt-test. If PID value is correct, CHECK the DSM configuration and CONFIGURE, if necessary and RETEST. REFER to Section 418-01. If configured correctly and the DTC remains, INSTALL a new DSM. REFER to Section 419-10. CLEAR the DTC. REPEAT the selt-test.

NOTE: The following table lists only DTCs that pertain to the memory seat system.

Refer to Section 419-10 for a complete list of Smart Junction Box (SJB) Diagnostic Trouble Codes (DTCs).

Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index
DTC	Description	Source	Action
B1533	Memory 1 Switch Circuit Short to Battery	SJB	Go To Pinpoint Test I.
B1534	Memory 1 Switch Circuit Short to Ground	SJB	Go To Pinpoint Test I.
B1537	Memory 2 Switch Circuit Short to Battery	SJB	Go To Pinpoint Test I.
B1538	Memory 2 Switch Circuit Short to Ground	SJB	Go To Pinpoint Test L.

Climate Controlled Seat Module (CCSM) Diagnostic Trouble Code (DTC) Index
DTC	Description	Source	Action
B1342	ECU is Faulted	CCSM	INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module.
B1358	Ignition Switch or Blower Electronics Circuit Short to Ground	CCSM	Go To Pinpoint Test J.
B2477	Module Configuration Error	CCSM	This DTC indicates programmable module installation (PMI) has not been done to a newly installed module. CARRY OUT PMI. REFER to Section 418-01. CLEAR the DTC. CARRY OUT the self-test.
B2486	Climate Controlled Seat Module Voltage Out of Range	CCSM	CHECK circuit 1554 (WH) for a fault and REPAIR as needed. If okay, REFER to Section 414-00.
B2521	Tach Circuit Failure	CCSM	Go To Pinpoint Test J.
B2729	Cushion Overtemp Detected	CCSM	For driver CCSM, Go To Pinpoint Test K. For passenger CCSM, Go To Pinpoint Test L.
B2730	Back Overtemp Detected	CCSM	For driver CCSM, Go To Pinpoint Test K. For passenger CCSM, Go To Pinpoint Test L.
B2731	Differential Temperature Fault	CCSM	For driver CCSM, Go To Pinpoint Test K. For passenger CCSM, Go To Pinpoint Test L.
U2362	UBP Invalid Data Node ID	CCSM	NOTE: DTC U2362 indicates a network concern, the CCSM is not the source of the fault. Make sure the correct module is installed to the vehicle. Otherwise, REFER to Section 418-00 to diagnose the network communication concern.

Electronic Automatic Temperature Control (EATC) Module Diagnostic Trouble Code (DTC) Index
**NOTE:** Only the heated seat DTCs are listed. For all EATC module DTCs, refer to Section 412-00.
DTC	Description	Source	Action
B2963	Driver Seat Heater Feedback Circuit Failure	EATC module	Go To Pinpoint Test P.
B2964	Passenger Seat Heater Feedback Circuit Failure	EATC module	Go To Pinpoint Test Q.

Symptom Chart

Symptom Chart
Condition	Possible Sources	Action
The power seat is inoperative — driver	Fuse Wiring, terminals or connectors Driver seat control switch	Go To Pinpoint Test A.
The power seat is inoperative — passenger	Fuse Wiring, terminals or connectors Passenger seat control switch	Go To Pinpoint Test B.
The power seat moves but is noisy	Seat track	Go To Pinpoint Test C.
The power seat moves but is loose	Fastening hardware Seat track	Go To Pinpoint Test D.
The power seat does not make full travel	Seat track obstructed Seat track	Go To Pinpoint Test E.
The power seat does not move horizontally/vertically — driver	Wiring, terminals or connectors Seat track Seat control switch	Go To Pinpoint Test F.
The power seat does not move horizontally/vertically — passenger	Wiring, terminals or connectors Seat track Seat control switch	Go To Pinpoint Test G.
No communication with the DSM	Fuse Wiring, terminals or connectors DSM	REFER to Section 418-00.
The memory seat is inoperative	Fuse Wiring, terminals or connectors Seat control switch Seat track Driver seat module (DSM)	Go To Pinpoint Test H.
The memory seat does not operate correctly — does not operate using the memory set switch	Wiring, terminals or connectors Memory set switch Position sensor DSM	Go To Pinpoint Test I.
The memory seat does not operate correctly — does not operate using the remote transmitter	Wiring, terminals or connectors DSM Keyless entry transmitter	RUN DSM self-test. If codes are present, REFER to the DTC Index; if no codes are present, REFER to Section 501-14.
No communication with the CCSM — driver and/or passenger	Fuse(s) Wiring, terminals or connectors UART (universal asynchronous receiver-transmitter) based protocol (UBP) network communication fault CCSM	REFER to Section 418-00.
A single climate controlled seat does not operate/does not operate correctly	Wiring, terminals or connectors UART (universal asynchronous receiver-transmitter) based protocol (UBP) network communication fault Electronic automatic temperature control (EATC) module Climate controlled seat module (CCSM)	Go To Pinpoint Test M.
The passenger climate controlled seat does not operate, the driver climate controlled seat does operate	Wiring, terminals or connectors UBP network communication fault EATC module CCSM	CHECK passenger CCSM C3036b-9, circuit 1205 (BK) for less than 5 ohms to ground. If OK, Go To Pinpoint Test M.
The heated seat is inoperative — driver	Fuse(s) Wiring, terminals or connectors EATC module Heated seat module Seat cushion heater mat Seat backrest heater mat	Go To Pinpoint Test N.
The heated seat is inoperative — passenger	Fuse(s) Wiring, terminals or connectors EATC module Heated seat module Seat cushion heater mat Seat backrest heater mat	Go To Pinpoint Test O.
The heated seat does not operate correctly — seat does heat but the heated seat indicator does not illuminate when pressed, driver	Wiring, terminals or connectors EATC module Heated seat module	Go To Pinpoint Test P.
The heated seat does not operate correctly — seat does heat but the heated seat indicator does not illuminate when pressed, passenger	Wiring, terminals or connectors EATC module Heated seat module	Go To Pinpoint Test Q.

Pinpoint Tests

CAUTION: Electronic modules are sensitive to electrostatic discharge. If exposed to these charges, damage can result.

Refer to Inspection and Verification, the DSM, CCSM, SJB and DATC Diagnostic Trouble Code (DTC) Tables and the Symptom Chart for direction to the appropriate Pinpoint Test.

Pinpoint Test A: The Power Seat Is Inoperative — Driver

Refer to Wiring Diagrams Cell 120, Power Seats for schematic and connector information.

Normal Operation

The seat control switch is powered by battery voltage to driver seat control switch circuit 566 (DG) and is supplied ground on driver circuit 1205 (BK).

Possible Causes

An inoperative driver power seat can be caused by:

an open fuse.
faulty wiring, terminals or connectors.
a faulty seat control switch.

PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE — DRIVER

Test Step	Result / Action to Take
A1 CHECK CIRCUIT 566 (DG) FOR VOLTAGE
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Driver Safety Belt Buckle Pretensioner C323. Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323. Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Driver Seat Control Switch C360. Measure the voltage between driver seat control switch C360-H, circuit 566 (DG), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to A2. No VERIFY the bussed electrical center (BEC) fuse 11 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
A2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between driver seat control switch C360-E, circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes INSTALL a new driver seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test B: The Power Seat Is Inoperative — Passenger

Refer to Wiring Diagrams Cell 120, Power Seats for schematic and connector information.

Normal Operation

The seat control switch is powered by battery voltage to passenger seat control switch circuit 51 (BK/WH) and is supplied ground on passenger circuits 1205 (BK).

Possible Causes

An inoperative passenger power seat can be caused by:

an open fuse.
faulty wiring, terminals or connectors.
a faulty seat control switch.

PINPOINT TEST B: THE POWER SEAT IS INOPERATIVE—PASSENGER

Test Step	Result / Action to Take
B1 CHECK CIRCUIT 51 (BK/WH) FOR VOLTAGE
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Passenger Safety Belt Buckle Pretensioner C303. Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303. Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Passenger Seat Control Switch C330. Measure the voltage between passenger seat control switch C330-H, circuit 51 (BK/WH), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to B2. No VERIFY the bussed electrical center (BEC) fuse 15 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
B2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between passenger seat control switch C330-E, circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes INSTALL a new passenger seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test C: The Power Seat Moves But Is Noisy

Normal Operation

The power seat should move quietly during operation. Some noise is acceptable.

Possible Causes

A noisy power seat can be caused by:

an object obstructing seat movement.
a misaligned seat track.
a faulty seat track.

PINPOINT TEST C: THE POWER SEAT MOVES BUT IS NOISY

Test Step	Result / Action to Take
C1 CHECK THE TRACK ALIGNMENT
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: The Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Disconnect: The Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Check the alignment of the track to the floor and the track to the seat. Is the track out of alignment?	Yes ALIGN the track to the seat and the floor. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Test Step

Result / Action to Take

C1 CHECK THE TRACK ALIGNMENT

WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.

NOTE:

the SRS must be depowered.

Section 501-20B

NOTE:

Key in OFF position.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B.
Disconnect: The Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger).
Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger).
Disconnect: The Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only).
Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only).
WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.
Connect the battery ground cable.
Check the alignment of the track to the floor and the track to the seat.
Is the track out of alignment?

Yes
ALIGN the track to the seat and the floor. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger).

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger).

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
INSTALL a new seat track. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger).

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger).

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test D: The Power Seat Moves But Is Loose

Normal Operation

The power seat movement should be smooth and the seat cushion should not rock during or after operation.

Possible Causes

A loose power seat can be caused by:

loose fastening hardware.
a faulty seat track.

PINPOINT TEST D: THE POWER SEAT MOVES BUT IS LOOSE

Test Step	Result / Action to Take
D1 CHECK THE FASTENING HARDWARE
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Disconnect: Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Is the fastening hardware loose?	Yes TIGHTEN all fastening hardware to specification. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Test Step

Result / Action to Take

D1 CHECK THE FASTENING HARDWARE

NOTE:

the SRS must be depowered.

Section 501-20B

NOTE:

Key in OFF position.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B.
Disconnect: Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger).
Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger).
Disconnect: Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only).
Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only).
WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.
Connect the battery ground cable.
Is the fastening hardware loose?

Yes
TIGHTEN all fastening hardware to specification. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger).

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger).

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
INSTALL a new seat track. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger).

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger).

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test E: The Power Seat Does Not Make Full Travel

Normal Operation

The driver power seat should travel fully horizontal (FORWARD/REARWARD) and vertical (front UP/DOWN and rear UP/DOWN). The passenger power seat should travel fully horizontal (FORWARD/REARWARD) and vertical (front UP/DOWN).

Possible Causes

A power seat that does not make full travel can be caused by:

an obstruction.
a faulty seat track.

PINPOINT TEST E: THE POWER SEAT DOES NOT MAKE FULL TRAVEL

Test Step	Result / Action to Take
E1 CHECK FOR OBSTRUCTION IN THE SEAT TRACK
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Disconnect: Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Key in OFF position. Remove the affected seat. Refer to Seat — Front in this section. Are there any obstructions in the track?	Yes REMOVE the obstruction(s) and GREASE the track(s). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Test Step

Result / Action to Take

E1 CHECK FOR OBSTRUCTION IN THE SEAT TRACK

NOTE:

the SRS must be depowered.

Section 501-20B

NOTE:

Key in OFF position.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B.
Disconnect: Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger).
Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger).
Disconnect: Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only).
Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only).
WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.
Connect the battery ground cable.
Key in OFF position.
Remove the affected seat. Refer to Seat — Front in this section.
Are there any obstructions in the track?

Yes
REMOVE the obstruction(s) and GREASE the track(s). TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger).

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger).

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
INSTALL a new seat track. TEST the system for normal operation.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger).

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger).

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test F: The Power Seat Does Not Move Horizontally/Vertically — Driver

Refer to Wiring Diagrams Cell 120, Power Seats for schematic and connector information.

Normal Operation

The driver seat control switch is powered by battery voltage on circuit 566 (DG) and is supplied ground on circuit 1205 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (FORWARD/REVERSE) and vertically (front UP/DOWN and rear UP/DOWN).

Possible Causes

A driver power seat that does not move horizontally and/or vertically can be caused by:

faulty wiring, terminals or connectors.
a faulty seat control switch.
a faulty seat track motor (seat track).

PINPOINT TEST F: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY — DRIVER

Test Step	Result / Action to Take
F1 DETERMINE WHICH DIRECTION HAS FAILED
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Operate the power seat FORWARD and REARWARD. Will the track move horizontally?	Yes GO to F5. No GO to F2.
F2 CHECK THE VOLTAGE TO FORWARD/REVERSE SEAT MOTOR
Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Driver Safety Belt Buckle Pretensioner C323. Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323. Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Power Seat Motor C357. Measure the voltage between power seat motor assembly C357-4, circuit 980 (YE/WH), harness side and C357-1, circuit 981 (RD/WH), harness side while pushing the forward/reverse switch FORWARD and BACKWARD. Is the voltage greater than -10 volts when the forward/reverse switch is pressed FORWARD, greater than +10 volts when the forward/reverse switch is pressed BACKWARD and 0 volts when the switch is in the REST position?	Yes INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to F3.
F3 CHECK CIRCUIT 980 (YE/WH) FOR AN OPEN OR A SHORT TO GROUND
Disconnect: Seat Control Switch C360. Measure the resistance between seat control switch C360-G, circuit 980 (YE/WH), harness side and power seat motor assembly C357-4, circuit 980 (YE/WH), harness side; and between seat control switch C360-G, circuit 980 (YE/WH), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes GO to F4. No REPAIR circuit 980 (YE/WH). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
F4 CHECK CIRCUIT 981 (RD/WH) FOR AN OPEN OR A SHORT TO GROUND
Measure the resistance between seat control switch C360-F, circuit 981 (RD/WH), harness side and power seat motor assembly C357-1, circuit 981 (RD/WH), harness side; and between seat control switch C360-F, circuit 981 (RD/WH), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 981 (RD/WH). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
F5 DETERMINE SEAT TILTING FAILURE
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Driver Safety Belt Buckle Pretensioner C323. Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323. Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Determine seat tilting failure. Can the seat be tilted FORWARD or REARWARD?	Yes If only the forward tilting operates, GO to F6 . If only the rear tilting operates, GO to F9 . No INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
F6 CHECK THE VOLTAGE TO THE REAR HEIGHT MOTOR
Disconnect: Power Seat Motor C357. Measure the voltage between power seat motor assembly C357-2, circuit 982 (YE/LG), harness side and C357-3, circuit 983 (RD/LG), harness side while depressing the rear tilt switch UP and DOWN. Is the voltage greater than +10 volts when the rear tilt switch is pressed UP, greater than -10 volts when the rear tilt switch is pressed DOWN and 0 volts when the switch is in the REST position?	Yes INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to F7.
F7 CHECK CIRCUIT 983 (RD/LG) FOR AN OPEN OR A SHORT TO GROUND
Disconnect: Seat Control Switch C360. Measure the resistance between seat control switch C360-D, circuit 983 (RD/LG), harness side and power seat motor assembly C357-3, circuit 983 (RD/LG), harness side; and between seat control switch C360-D, circuit 983 (RD/LG), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes GO to F8. No REPAIR circuit 983 (RD/LG). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
F8 CHECK CIRCUIT 982 (YE/LG) FOR AN OPEN OR A SHORT TO GROUND
Measure the resistance between seat control switch C360-C, circuit 982 (YE/LG), harness side and power seat motor assembly C357-2, circuit 982 (YE/LG), harness side; and between seat control switch C360-C, circuit 982 (YE/LG), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 982 (YE/LG). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
F9 CHECK THE VOLTAGE TO FRONT HEIGHT MOTOR
Disconnect: Power Seat Motor C357. Measure the voltage between power seat motor assembly C357-5, circuit 990 (YE/LB), harness side and C357-6, circuit 979 (RD/LB), harness side while pushing the rear tilting switch UP and DOWN. Is the voltage greater than +10 volts when the front tilt switch is pressed UP, greater than -10 volts when the front tilt switch is pressed DOWN and 0 volts when the switch is in the REST position?	Yes INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to F10.
F10 CHECK CIRCUIT 979 (RD/LB) FOR AN OPEN OR A SHORT TO GROUND
Disconnect: Seat Control Switch C360. Measure the resistance between seat control switch C360-A, circuit 979 (RD/LB), harness side and power seat motor assembly C357-6, circuit 979 (RD/LB), harness side; and between seat control switch C360-A, circuit 979 (RD/LB), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes GO to F11. No REPAIR circuit 979 (RD/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
F11 CHECK CIRCUIT 990 (YE/LB) FOR AN OPEN
Measure the resistance between seat control switch C360-B, circuit 990 (YE/LB), harness side and power seat motor assembly C357-5, circuit 990 (YE/LB), harness side; and between seat control switch C360-B, circuit 990 (YE/LB), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 990 (YE/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test G: The Power Seat Does Not Move Horizontally/Vertically — Passenger

Refer to Wiring Diagrams Cell 120, Power Seats for schematic and connector information.

Normal Operation

The passenger seat control switch is powered by battery voltage on circuit 51 (BK/WH) and is supplied ground on circuit 1205 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (FORWARD/REVERSE) and vertically (front UP/DOWN and rear UP/DOWN).

Possible Causes

A passenger power seat that does not move horizontally and/or vertically can be caused by:

faulty wiring, terminals or connectors.
a faulty seat control switch.
a faulty seat track motor (seat track).

PINPOINT TEST G: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY — PASSENGER

Test Step	Result / Action to Take
G1 DETERMINE WHICH DIRECTION HAS FAILED
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Operate the power seat FORWARD and REARWARD. Will the track move horizontally?	Yes GO to G5. No GO to G2.
G2 CHECK THE VOLTAGE TO FORWARD/REVERSE SEAT MOTOR
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Passenger Safety Belt Buckle Pretensioner C303. Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303. Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Power Seat Motor C3015. Measure the voltage between power seat motor assembly C3015-4, circuit 986 (YE/WH), harness side and C3015-1, circuit 987 (RD/WH), harness side while pushing the forward/reverse switch FORWARD and BACKWARD. Is the voltage greater than -10 volts when the forward/reverse switch is pressed FORWARD, greater than +10 volts when the forward/reverse switch is pressed BACKWARD and 0 volts when the switch is in the REST position?	Yes INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to G3.
G3 CHECK CIRCUIT 986 (YE/WH) FOR AN OPEN OR A SHORT TO GROUND
Disconnect: Seat Control Switch C330. Measure the resistance between seat control switch C330-G, circuit 986 (YE/WH), harness side and power seat motor assembly C3015-4, circuit 986 (YE/WH), harness side; and between seat control switch C330-G, circuit 986 (YE/WH), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes GO to G4. No REPAIR circuit 986 (YE/WH). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
G4 CHECK CIRCUIT 987 (RD/WH) FOR AN OPEN OR A SHORT TO GROUND
Measure the resistance between seat control switch C330-F, circuit 987 (RD/WH), harness side and power seat motor assembly C3015-1, circuit 987 (RD/WH), harness side; and between seat control switch C330-F, circuit 987 (RD/WH), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 987 (RD/WH). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
G5 DETERMINE SEAT TILTING FAILURE
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Passenger Safety Belt Buckle Pretensioner C303. Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303. Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Determine seat tilting failure. Can the seat be tilted FORWARD or REARWARD?	Yes If only the forward tilting operates, GO to G6 . If only the rear tilting operates, GO to G9 . No INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
G6 CHECK THE VOLTAGE TO THE REAR HEIGHT MOTOR
Disconnect: Power Seat Motor C3015. Measure the voltage between power seat motor assembly C3015-2, circuit 988 (YE/LG), harness side and C3015-3, circuit 989 (RD/LG), harness side while depressing the rear tilt switch UP and DOWN. Is the voltage greater than -10 volts when the rear tilt switch is pressed UP, greater than +10 volts when the rear tilt switch is pressed DOWN and 0 volts when the switch is in the REST position?	Yes INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to G7.
G7 CHECK CIRCUIT 988 (YE/LG) FOR AN OPEN OR A SHORT TO GROUND
Disconnect: Seat Control Switch C330. Measure the resistance between seat control switch C330-D, circuit 988 (YE/LG), harness side and power seat motor assembly C3015-2, circuit 988 (YE/LG), harness side; and between seat control switch C330-D, circuit 988 (YE/LG), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes GO to G8. No REPAIR circuit 988 (YE/LG). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
G8 CHECK CIRCUIT 989 (RD/LG) FOR AN OPEN OR A SHORT TO GROUND
Measure the resistance between seat control switch C330-C, circuit 989 (RD/LG), harness side and power seat motor assembly C3015-3, circuit 989 (RD/LG), harness side; and between seat control switch C330-C, circuit 989 (RD/LG), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 989 (RD/LG). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
G9 CHECK THE VOLTAGE TO FRONT HEIGHT MOTOR
Disconnect: Power Seat Motor C3015. Measure the voltage between power seat motor assembly C3015-5, circuit 985 (RD/LB), harness side and C3015-6, circuit 984 (YE/LB), harness side while pushing the rear tilting switch UP and DOWN. Is the voltage greater than +10 volts when the front tilt switch is pressed UP, greater than -10 volts when the front tilt switch is pressed DOWN and 0 volts when the switch is in the REST position?	Yes INSTALL a new seat track. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to G10.
G10 CHECK CIRCUIT 985 (RD/LB) FOR AN OPEN OR A SHORT TO GROUND
Disconnect: Seat Control Switch C330. Measure the resistance between seat control switch C330-A, circuit 985 (RD/LB), harness side and power seat motor assembly C3015-5, circuit 985 (RD/LB), harness side; and between seat control switch C330-A, circuit 985 (RD/LB), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes GO to G11. No REPAIR circuit 985 (RD/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
G11 CHECK CIRCUIT 984 (YE/LB) FOR AN OPEN
Measure the resistance between seat control switch C330-B, circuit 984 (YE/LB), harness side and power seat motor assembly C3015-6, circuit 984 (YE/LB), harness side; and between seat control switch C330-B, circuit 984 (YE/LB), harness side and ground. Is the resistance less than 5 ohms between the power seat motor and the seat control switch and greater than 10,000 ohms between the seat control switch and ground?	Yes INSTALL a new seat control switch. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 984 (YE/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test H: The Memory Seat Is Inoperative

Refer to Wiring Diagrams Cell 123, Memory Seats for schematic and connector information.

Refer to Wiring Diagrams Cell 149, Component Testing for schematic and connector information.

NOTE: Before carrying out diagnostic testing for the driver seat module (DSM), wake the module by activating the power seat using the seat control switch, otherwise module communication failure will occur.

Normal Operation

The driver seat control switch is powered by battery voltage on circuit 1567 (RD/LB). When pressed, the seat control switch supplies the voltage to the driver seat module (DSM). The DSM then supplies voltage and ground to the appropriate power seat track motor based on the inputs received from the seat control switch. When pressed in the opposite direction, the seat control switch reverses the polarity to the DSM, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat horizontally (FORWARD/REVERSE) and vertically (front UP/DOWN and rear UP/DOWN).

The following pinpoint test diagnoses a memory seat that does not operate in one or more directions when using the seat control switch. If the memory seat moves in all directions using the seat control switch, Go To Pinpoint Test I.

Possible Causes

An inoperative memory seat can be caused by:

an open fuse.
faulty wiring, terminals or connectors.
a faulty seat control switch.
a faulty seat track motor (seat track).
a faulty DSM.

PINPOINT TEST H: THE MEMORY SEAT IS INOPERATIVE

Test Step

Result / Action to Take

H1 RETRIEVE THE DTCs

NOTE:

the SRS must be depowered.

Section 501-20B

NOTE:

Key in OFF position.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B.
Disconnect: Driver Safety Belt Buckle Pretensioner C323.
Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323.
Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only).
Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only).
WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.
Connect the battery ground cable.
Connect the diagnostic tool.
Enter the following diagnostic mode on the diagnostic tool: Retrieve and Document Continuous DTCs.
Enter the following diagnostic mode on the diagnostic tool: Clear the Continuous DTCs.
Enter the following diagnostic mode on the diagnostic tool: On-Demand Self-Test.
Are any DTCs retrieved?

Yes
If DTCs B1663, B1664 and B1665 are all retrieved, GO to H9 .

If DTC B1663 is retrieved, GO to H17 .

If DTC B1664 is retrieved, GO to H20 .

If DTC B1665 is retrieved, GO to H23 .

If DTC B1711 is retrieved, GO to H3 .

If DTC B1715 is retrieved, GO to H3 .

If DTC B1719 is retrieved, GO to H3 .

If DTC B1723 is retrieved, GO to H3 .

If DTC B1727 is retrieved, GO to H3 .

If DTC B1731 is retrieved, GO to H3 .

If DTC B1342 is retrieved, INSTALL a new DSM. REFER to Section 419-10. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
GO to H2.

H2 CHECK THE DSM PIDs FOR CORRECT MEMORY SEAT SWITCH INPUT STATUS

Enter the following diagnostic mode on the diagnostic tool: Monitor Driver Seat Input Switch Status PIDs.
Monitor the driver seat input switch status PIDs while activating the seat switch.
Do the PID values agree with the switch positions?

Yes
GO to H8.

No
If bussed electrical center (BEC) fuse 51 (10A) fails while operating the seat control switch, GO to H6 .

If BEC fuse 51 (10A) is OK, GO to H3 .

H3 CHECK THE SEAT CONTROL SWITCH

Key in OFF position.
Disconnect: Seat Control Switch C360.
Check the seat control switch.
Refer to Wiring Diagrams Cell 149 for schematic and connector information.
Is the seat control switch OK?

Yes
GO to H4.

No
INSTALL a new seat control switch. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

H4 CHECK FOR VOLTAGE TO THE SEAT CONTROL SWITCH — CIRCUIT 1567 (RD/LB)

Measure the voltage between seat control switch C360-H, circuit 1567 (RD/LB), harness side and ground.

Is the voltage greater than 10 volts?

Yes
GO to H5.

No
VERIFY bussed electrical center (BEC) fuse 51 (10A) is OK. If OK, REPAIR circuit 1567 (RD/LB). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

H5 CHECK CIRCUITS 1468 (GY/LB), 1467 (GY/YE), 1466 (GY/OG), 1463 (RD/YE), 1465 (GY/WH) AND 1464 (YE) FOR A SHORT TO VOLTAGE

Disconnect: Driver Seat Module (DSM) C341b.
Key in ON position.
Measure the voltage between the following seat control switch C360 pins, harness side and ground.

Connector-Pin	Circuit
C360-A	1463 (RD/YE)
C360-B	1464 (YE)
C360-C	1468 (GY/LB)
C360-D	1467 (GY/YE)
C360-F	1466 (GY/OG)
C360-G	1465 (GY/WH)

Yes REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test. DIS

Is voltage indicated?

H6 CHECK CIRCUITS 1468 (GY/LB), 1467 (GY/YE), 1466 (GY/OG), 1463 (RD/YE), 1465 (GY/WH) AND 1464 (YE) FOR A SHORT TO GROUND

Key in OFF position.
Measure the resistance between the following seat control switch C360 pins, harness side and ground.

Connector-Pin	Circuit
C360-A	1463 (RD/YE)
C360-B	1464 (YE)
C360-C	1468 (GY/LB)
C360-D	1467 (GY/YE)
C360-F	1466 (GY/OG)
C360-G	1465 (GY/WH)

Are the resistances greater than 10,000 ohms?

H7 CHECK CIRCUITS 1468 (GY/LB), 1467 (GY/YE), 1466 (GY/OG), 1463 (RD/YE), 1465 (GY/WH) AND 1464 (YE) FOR AN OPEN

Measure the resistance between the following seat control switch C360 pins harness side and driver seat module (DSM) C341b pins, harness side.

Seat Control Switch C360-Pin	Circuit	Driver Seat Module (DSM) C341b-Pin
C360-A	1463 (RD/YE)	C341b-7
C360-B	1464 (YE)	C341b-16
C360-C	1468 (GY/LB)	C341b-4
C360-D	1467 (GY/YE)	C341b-3
C360-F	1466 (GY/OG)	C341b-14
C360-G	1465 (GY/WH)	C341b-15

Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM. REFER to Section 419-10. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

H8 CHECK THE DRIVER SEAT MODULE (DSM) FOR CORRECT OUTPUTS USING ACTIVE COMMANDS

Enter the following diagnostic mode on the diagnostic tool: Active Command Menu.
Toggle the following DSM active commands ON and OFF:

Front motor up

Front motor down

Rear motor up

Rear motor down

Horizontal motor forward

Horizontal motor backward

Does the driver seat operate correctly using the active commands?

H9 CHECK THE DRIVER SEAT MODULE (DSM) FOR VOLTAGE — CIRCUIT 566 (DG)

Key in OFF position.
Disconnect: Driver Seat Module (DSM) C341e.
Measure the voltage between driver seat module (DSM) C341a-1, circuit 566 (DG), harness side and ground.

Is the voltage greater than 10 volts?

Yes
GO to H10.

No
VERIFY the bussed electrical center (BEC) fuse 11 (30A) is OK. If OK, REPAIR circuit 566 (DG). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

H10 CHECK CIRCUIT 1205 (BK) FOR AN OPEN

Measure the resistance between driver seat module (DSM) C341a-2, circuit 1205 (BK), harness side and ground.

Is the resistance less than 5 ohms?

Yes
GO to H11.

No
REPAIR circuit 1205 (BK). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

H11 CHECK CIRCUITS 1469 (RD/LB) AND 1470 (YE/LB) FOR A SHORT TO GROUND

Disconnect: Driver Seat Module (DSM) C341b.
Measure the resistance between driver seat module (DSM) C341b-1, circuit 1469 (RD/LB), harness side and ground; and between DSM C341b-24, circuit 1470 (YE/LB), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes
GO to H13.

No
GO to H12.

H12 CHECK POWER SEAT MOTOR FOR A SHORT TO GROUND — CIRCUITS 1469 (RD/LB) AND 1470 (YE/LB)

Disconnect: Driver Seat Module (DSM) C341b.
Disconnect: Power Seat Motor C353.
Measure the resistance between driver seat module (DSM) C341b-1, circuit 1469 (RD/LB), harness side and ground; and between DSM C341b-24, circuit 1470 (YE/LB), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new seat track. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

H13 CHECK CIRCUITS 1474 (RD/LG) AND 1473 (YE/LG) FOR A SHORT TO GROUND

Measure the resistance between driver seat module (DSM) C341b-9, circuit 1474 (RD/LG), harness side and ground; and between DSM C341b-23, circuit 1473 (YE/LG), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes
GO to H15.

No
GO to H14.

H14 CHECK THE POWER SEAT MOTOR FOR A SHORT TO GROUND — CIRCUITS 1474 (RD/LG) AND 1473 (YE/LG)

Disconnect: Power Seat Motor C353.
Measure the resistance between driver seat module (DSM) C341b-9, circuit 1474 (RD/LG), harness side and ground; and between DSM C341b-23, circuit 1473 (YE/LG), harness side and ground.

Are the resistances greater than 10,000 ohms?

H15 CHECK CIRCUITS 1472 (YE/WH) AND 1471 (RD/WH) FOR A SHORT TO GROUND

Measure the resistance between driver seat module (DSM) C341b-22, circuit 1472 (YE/WH), harness side and ground; and between DSM C341b-11, circuit 1471 (RD/WH), harness side and ground.

Are the resistances greater than 10,000 ohms?

H16 CHECK THE POWER SEAT MOTOR FOR A SHORT TO GROUND — CIRCUITS 1472 (YE/WH) AND 1471 (RD/WH)

Disconnect: Power Seat Motor C353.
Measure the resistance between driver seat module (DSM) C341b-22, circuit 1472 (YE/WH), harness side and ground; and between DSM C341b-11, circuit 1471 (RD/WH), harness side and ground.

Are the resistances greater than 10,000 ohms?

H17 CHECK THE POWER SEAT MOTOR FOR CORRECT OPERATION

Key in OFF position.
Disconnect: Power Seat Motor C353.
Key in ON position.
Measure the voltage between power seat motor assembly C353-5, circuit 1470 (YE/LB) and C353-6, circuit 1469 (RD/LB), harness side while toggling DSM active commands front motor up and front motor down ON and OFF.

Does the voltage change from zero volts?

H18 CHECK CIRCUITS 1469 (RD/LB) AND 1470 (YE/LB) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: Driver Seat Module (DSM) C341b.
Key in ON position.
Measure the voltage between driver seat module (DSM) C341b-1, circuit 1469 (RD/LB), harness side and ground; and between DSM C341B-24, circuit 1470 (YE/LB), harness side and ground.

Is voltage indicated?

H19 CHECK CIRCUITS 1469 (RD/LB) AND 1470 (YE/LB) FOR AN OPEN

Key in OFF position.
Measure the resistance between driver seat module (DSM) C341b-1, circuit 1469 (RD/LB), harness side and power seat motor assembly C353-6, circuit 1469 (RD/LB), harness side; and between DSM C341B-24, circuit 1470 (YE/LB), harness side and power seat motor assembly C353-5, circuit 1470 (YE/LB), harness side.

Are the resistances less than 5 ohms?

H20 CHECK THE POWER SEAT MOTOR FOR CORRECT OPERATION

Key in OFF position.
Disconnect: Power Seat Motor C353.
Key in ON position.
Measure the voltage between power seat motor assembly C353-2, circuit 1474 (RD/LG), harness side and C353-3, circuit 1473 (YE/LG), harness side while toggling DSM active commands rear motor up and rear motor down ON and OFF.

Does the voltage change from zero volts?

H21 CHECK CIRCUITS 1474 (RD/LG) AND 1473 (YE/LG) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: Driver Seat Module (DSM) C341b.
Key in ON position.
Measure the voltage between driver seat module (DSM) C341b-9, circuit 1474 (RD/LG), harness side and ground; and between DSM C341b-23, circuit 1473 (YE/LG), harness side and ground.

Is voltage indicated?

H22 CHECK CIRCUITS 1474 (RD/LG) AND 1473 (YE/LG) FOR AN OPEN

Key in OFF position.
Measure the resistance between driver seat module (DSM) C341b-9, circuit 1474 (RD/LG), harness side and power seat motor assembly C353-2, circuit 1474 (RD/LG), harness side; and between DSM C341b-23, circuit 1473 (YE/LG), harness side and power seat motor assembly C353-3, circuit 1473 (YE/LG), harness side.

Are the resistances less than 5 ohms?

H23 CHECK THE POWER SEAT MOTOR FOR CORRECT OPERATION

Key in OFF position.
Disconnect: Power Seat Motor C353.
Key in ON position.
Measure the voltage between power seat motor assembly C353-4, circuit 1471 (RD/WH) and C353-1, circuit 1472 (YE/WH), harness side while toggling DSM active commands horizontal motor forward and horizontal motor backward ON and OFF.

Does the voltage change from zero volt?

H24 CHECK CIRCUITS 1472 (YE/WH) AND 1471 (RD/WH) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: Driver Seat Module (DSM) C341b.
Key in ON position.
Measure the voltage between driver seat module (DSM) C341b-22, circuit 1472 (YE/WH), harness side and ground; and between DSM C341b-11, circuit 1471 (RD/WH), harness side and ground.

Is voltage indicated?

H25 CHECK CIRCUITS 1472 (YE/WH) AND 1471 (RD/WH) FOR AN OPEN

Key in OFF position.
Measure the resistance between driver seat module (DSM) C341b-22, circuit 1472 (YE/WH), harness side and power seat motor assembly C353-1, circuit 1472 (YE/WH), harness side; and between DSM C341b-11, circuit 1471 (RD/WH), harness side and power seat motor assembly C353-4, circuit 1471 (RD/WH), harness side.

Are the resistances less than 5 ohms?

Pinpoint Test I: The Memory Seat Does Not Operate Correctly — Does Not Operate Using The Memory Set Switch

Refer to Wiring Diagrams Cell 123, Memory Seats for schematic and connector information.

Normal Operation

Each power seat track motor includes a position sensor, which is a potentiometer. The DSM supplies a shared reference voltage and ground to each position sensor. This enables the position sensor to send a variable voltage back to the DSM to indicate the position of the power seat track motor. The DSM uses this information to return the seat to a stored pre-programmed position when pressing the memory set switch or a remote transmitter. Refer to Seats and the owner's literature for additional information on programming the DSM for storing memory seat, adjustable pedal and adjustable mirror positions.

The following pinpoint test diagnoses a memory seat that does not operate correctly using the memory set switch. If the memory seat does not move in all directions using the seat control switch, Go To Pinpoint Test H.

Possible Causes

A memory seat that does not operate correctly can be caused by:

an open fuse.
faulty wiring, terminals or connectors.
a faulty memory set switch.
a faulty memory seat position sensor.
a faulty DSM.
a faulty smart junction box (SJB).

PINPOINT TEST I: THE MEMORY SEAT DOES NOT OPERATE CORRECTLY — DOES NOT OPERATE USING THE MEMORY SET SWITCH

Test Step

Result / Action to Take

I1 RETRIEVE THE DTCs

NOTE:

the SRS must be depowered.

Section 501-20B

NOTE:

Key in OFF position.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B.
Disconnect: Driver Safety Belt Buckle Pretensioner C323.
Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323.
Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only).
Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only).
WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.
Connect the battery ground cable.
Connect the diagnostic tool.
Enter the following diagnostic mode on the diagnostic tool: Retrieve and Document Continuous DTCs from the DSM and Smart Junction Box (SJB).
Enter the following diagnostic mode on the diagnostic tool: Clear All Continuous DTCs (DSM and SJB).
Enter the following diagnostic mode on the diagnostic tool: On-Demand Self-Test (DSM and SJB).
NOTE: During the on-demand self-test of the DSM, document when the memory set LED illuminates and turns off.
Are any DTCs retrieved or does the memory set LED fail to illuminate during the on-demand self-test?

Yes
If the memory set LED fails to illuminate during the on-demand self-test, GO to I5 .

If DTCs B1950, B1954 and B1962 are all retrieved, GO to I8 .

If DTC B1530 is retrieved, GO to I3 .

If DTC B1533 is retrieved, GO to I5 .

If DTC B1534 is retrieved, GO to I3 .

If DTC B1537 is retrieved, GO to I5 .

If DTC B1538 is retrieved, GO to I3 .

If DTC B1663 is retrieved, GO to I9 .

If DTC B1664 is retrieved, GO to I13 .

If DTC B1665 is retrieved, GO to I15 .

If DTC B1950 is retrieved, GO to I12 .

If DTC B1952 is retrieved, GO to I12 .

If DTC B1954 is retrieved, GO to I9 .

If DTC B1956 is retrieved, GO to I9 .

If DTC B1962 is retrieved, GO to I15 .

If DTC B1964 is retrieved, GO to I15 .

If DTC B1342 is retrieved, INSTALL a new DSM. REFER to Section 419-10. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
GO to I2.

I2 CHECK THE DSM PIDs FOR CORRECT MEMORY SET SWITCH INPUT STATUS

Enter the following diagnostic mode on the diagnostic tool: Monitor Memory Set/Recall Input Switch Status PIDs.
Monitor the DSM memory set/recall input switch status PIDs while activating the seat switch.
Do the PID values agree with the switch positions?

Yes
GO to I8.

No
GO to I3.

I3 CHECK THE MEMORY SET SWITCH

Key in OFF position.
Disconnect: Memory Set Switch C9023.
Using the following table to check the memory set switch, measure the resistance between the memory set switch pins, component side, while pressing the indicated switch buttons and compare the results to the table.

Switch Button	Pins	Ohms
Memory Switch 1	7 and 2	Less than 5
Memory Switch 2	7 and 6	Less than 5
Memory Set Switch	7 and 5	Less than 5

Yes GO to I4 . No INSTALL a new memory set switch. CLEAR the DTCs. REPEAT the se

NOTE: Refer to multimeter user's manual for testing diodes.
Using the diode testing meter function and the following table, connect the meter leads to the memory set switch pins, component side. Measure the voltages and compare the results to the table, to check the switch LED indicator.

Positive Lead	Negative Lead	Volts
Pin 7	Pin 1	Greater than 0.3
Pin 1	Pin 7	OL

Does the memory set switch check OK?

Yes
GO to I4.

No
INSTALL a new memory set switch. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. REPOWER the SRS.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I4 CHECK GROUND CIRCUIT TO THE MEMORY SET SWITCH — CIRCUIT 1205 (BK)

Measure the resistance between memory set switch C9023-7, circuit 1205 (BK), harness side and ground.

Is the resistance less than 5 ohms?

Yes
GO to I5.

No
REPAIR circuit 1205 (BK). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I5 CHECK CIRCUITS 267 (BN/LG), 268 (BK/OG), 270 (BN/OG) AND 272 (WH/OG) FOR A SHORT TO VOLTAGE

Disconnect: DSM C341c.
Key in ON position.
Measure the voltage between the following memory set switch C9023 pins, harness side and ground:

Connector-Pin	Circuit
C9023-1	272 (WH/OG)
C9023-2	267 (BN/LG)
C9023-5	270 (BN/OG)
C9023-6	268 (BK/OG)

Is voltage indicated?

Yes
GO to I18.

No
GO to I6.

I6 CHECK CIRCUITS 267 (BN/LG), 268 (BK/OG), 270 (BN/OG) AND 272 (WH/OG) FOR A SHORT TO GROUND

Key in OFF position.
Measure the resistance between the following memory set C9023 switch pins, harness side and ground:

Connector-Pin	Circuit
C9023-1	272 (WH/OG)
C9023-2	267 (BN/LG)
C9023-5	270 (BN/OG)
C9023-6	268 (BK/OG)

Are the resistances greater than 10,000 ohms?

Yes
GO to I7.

No
GO to I19.

I7 CHECK CIRCUITS 267 (BN/LG), 268 (BK/OG), 270 (BN/OG) AND 272 (WH/OG) FOR AN OPEN

Measure the resistance between the following memory set switch C9023 pins and DSM C341c pins:

Memory Set Switch C9023-Pin	Circuit	DSM C341c-Pin
C9023-2	267 (BN/LG)	C341c-4
C9023-6	268 (BK/OG)	C341c-3
C9023-5	270 (BN/OG)	C341c-5
C9023-1	272 (WH/OG)	C341c-10

Are the resistances less than 5 ohms?

I8 CHECK THE DSM SEAT POSITION PIDs FOR CORRECT OUTPUT STATUS

Place the seat in a central position, using the seat control switch.
Enter the following diagnostic mode on the diagnostic tool: Monitor PIDs.
Monitor the following DSM PIDs:

Driver seat horizontal position

Driver seat front vertical position

Driver seat rear vertical position

Do the PID values increase with FORWARD/DOWN movement and decrease with REARWARD/UP movement throughout entire travel?

Yes
INSTALL a new DSM. REFER to Section 419-10. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
If the driver seat horizontal position PID values do not increase or decrease, GO to I15 .

If the driver seat front vertical position PID values do not increase or decrease, GO to I9 .

If the driver seat rear vertical position PID values do not increase or decrease, GO to I12 .

I9 CHECK CIRCUITS 443 (LG/RD), 447 (OG/RD) AND 446 (OG/WH) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: DSM C341b.
Disconnect: Front Height Memory Position Sensor C383.
Key in ON position.
Measure the voltage between memory seat position sensor C383-2, circuit 443 (LG/RD), harness side and ground; and between memory seat position sensor C383-1, circuit 447 (OG/RD), harness side and ground; and between memory seat position sensor C383-3, circuit 446 (OG/WH), harness side and ground.

Is voltage indicated?

I10 CHECK CIRCUITS 443 (LG/RD), 447 (OG/RD) AND 446 (OG/WH) FOR A SHORT TO GROUND

Key in OFF position.
Measure the resistance between memory seat position sensor C383-2, circuit 443 (LG/RD), harness side and ground; and between memory seat position sensor C383-1, circuit 447 (OG/RD), harness side and ground; and between memory seat position sensor C383-3, circuit 446 (OG/WH), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes
GO to I11.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I11 CHECK CIRCUITS 443 (LG/RD), 447 (OG/RD) AND 446 (OG/WH) FOR AN OPEN

Measure the resistance between memory seat position sensor C383-2, circuit 443 (LG/RD), harness side and DSM C341b-6, circuit 443 (LG/RD), harness side; between memory seat position sensor C383-1, circuit 447 (OG/RD), harness side and DSM C341b-13, circuit 447 (OG/RD), harness side; and between memory seat position sensor C383-3, circuit 446 (OG/WH), harness side and DSM C341b-19, circuit 446 (OG/WH), harness side.

Are the resistances less than 5 ohms?

Yes
INSTALL a new memory seat position sensor. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I12 CHECK CIRCUITS 444 (LG/BK), 447 (OG/RD) AND 446 (OG/WH) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: DSM C341b.
Disconnect: Rear Height Memory Seat Position Sensor C373.
Key in ON position.
Measure the voltage between memory seat position sensor C373-2, circuit 444 (LG/BK), harness side and ground; between memory seat position sensor C373-1, circuit 447 (OG/RD), harness side and ground; and between memory seat position sensor C373-3, circuit 446 (OG/WH), harness side and ground.

Is voltage indicated?

I13 CHECK CIRCUITS 444 (LG/BK), 447 (OG/RD) AND 446 (OG/WH) FOR A SHORT TO GROUND

Key in OFF position.
Measure the resistance between memory seat position sensor C373-2, circuit 444 (LG/BK), harness side and ground; between memory seat position sensor C373-1, circuit 447 (OG/RD), harness side and ground; and between memory seat position sensor C373-3, circuit 446 (OG/WH), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes
GO to I14.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I14 CHECK CIRCUITS 444 (LG/BK), 447 (OG/RD) AND 446 (OG/WH) FOR OPEN

Measure the resistance between memory seat position sensor C373-2, circuit 444 (LG/BK), harness side and DSM C341b-17, circuit 444 (LG/BK), harness side; between memory seat position sensor C373-1, circuit 447 (OG/RD), harness side and DSM C341b-13, circuit 447 (OG/RD), harness side; and between memory seat position sensor C373-3, circuit 446 (OG/WH), harness side and DSM C341b-19, circuit 446 (OG/WH), harness side.

Are the resistances less than 5 ohms?

I15 CHECK CIRCUITS 442 (LG/OG), 447 (OG/RD) AND 446 (OG/WH) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: DSM C341b.
Disconnect: Forward/Rearward Memory Seat Position Sensor C372.
Key in ON position.
Measure the voltage between memory seat position sensor C372-2, circuit 442 (LG/OG), harness side and ground; between memory seat position sensor C372-1, circuit 447 (OG/RD), harness side and ground; and between memory seat position sensor C372-3, circuit 446 (OG/WH), harness side and ground.

Is voltage indicated?

I16 CHECK CIRCUITS 442 (LG/OG), 447 (OG/RD) AND 446 (OG/WH) FOR A SHORT TO GROUND

Key in OFF position.
Measure the resistance between memory seat position sensor C372-2, circuit 442 (LG/OG), harness side and ground; between memory seat position sensor C372-1, circuit 447 (OG/RD), harness side and ground; and between memory seat position sensor C372-3, circuit 446 (OG/WH), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes
GO to I17.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I17 CHECK CIRCUITS 442 (LG/OG), 447 (OG/RD) AND 446 (OG/WH) FOR AN OPEN

Measure the resistance between memory seat position sensor C372-2, circuit 442 (LG/OG), harness side and DSM C341b-5, circuit 442 (LG/OG), harness side; between memory seat position sensor C372-1, circuit 447 (OG/RD), harness side and DSM C341b-13, circuit 447 (OG/RD), harness side; and between memory seat position sensor C372-3, circuit 446 (OG/WH), harness side and DSM C341b-19, circuit 446 (OG/WH), harness side.

Are the resistances less than 5 ohms?

I18 CHECK CIRCUITS 267 (BN/LG), 268 (BK/OG), 270 (BN/OG) AND 272 (WH/OG) FOR A SHORT TO VOLTAGE

Key in OFF position.
Disconnect: Smart Junction Box (SJB) C2280c and C2280e.
Key in ON position.
Measure the voltage between the following memory set switch C9023 pins, harness side and ground:

Connector-Pin	Circuit
C9023-1	272 (WH/OG)
C9023-2	267 (BN/LG)
C9023-5	270 (BN/OG)
C9023-6	268 (BK/OG)

Is voltage indicated?

Yes
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
INSTALL a new SJB. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

I19 CHECK CIRCUITS 267 (BN/LG), 268 (BK/OG), 270 (BN/OG) AND 272 (WH/OG) FOR A SHORT TO GROUND

Disconnect: Smart Junction Box (SJB) C2280c and C2280e.
Measure the resistance between the following memory set C9023 switch pins, harness side and ground:

Connector-Pin	Circuit
C9023-1	272 (WH/OG)
C9023-2	267 (BN/LG)
C9023-5	270 (BN/OG)
C9023-6	268 (BK/OG)

Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new SJB. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

No
REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323.

For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367.

REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test J: DTC B1358 — Ignition Switch Or Blower Electronics Circuit Short To Ground/DTC B2521 — Tach Circuit Failure

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

The climate controlled seat module (CCSM) provides voltage on circuit 1552 (RD) and ground on circuit 1553 (BK) to operate the climate controlled seat blower fan. The CCSM also supplies voltage on circuit 1565 (VT) that is used by the climate controlled seat blower fan to provide a feedback voltage to the CCSM indicating climate controlled seat blower fan speed.

Possible Causes

A tach circuit failure, ignition switch or blower electronics circuit short to ground fault can be caused by:

faulty wiring, terminals or connectors.
a faulty CCSM.
a faulty climate controlled seat blower fan.

PINPOINT TEST J: DTC B1358 — IGNITION SWITCH OR BLOWER ELECTRONICS CIRCUIT SHORT TO GROUND/DTC B2521 — TACH CIRCUIT FAILURE

Test Step	Result / Action to Take
J1 CHECK CIRCUIT 566 (DG) OR CIRCUIT 51 (DG)
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: The Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Disconnect: The Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Driver CCSM C3031a or Passenger CCSM C3036a. Key in ON position. Measure the voltage between driver CCSM C3031a-4, circuit 566 (BK/WH) or passenger CCSM C3036a-4, circuit 51 (BK/WH), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to J2. No VERIFY the bussed electrical center (BEC) fuse 11 (30A) or BEC fuse 15 (30A) are OK. If OK, REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J2 CHECK THE FAN MOTOR RPM INPUT
Key in OFF position. Connect: Driver CCSM C3031a or Passenger CCSM C3036a. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu Turn Climate Controlled Seat Blower Full Power. NOTE: The climate controlled seat blower fan will only operate for 15 seconds when using the active command to activate. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Monitor the climate controlled seat blower RPM PID while commanding the turn climate controlled seat blower full power active command ON then OFF. Does the PID value change when the climate controlled seat blower fan was commanded ON and OFF?	Yes CHECK for causes of the intermittent fault. INSPECT the connectors, terminals and wiring. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to J3.
J3 VERIFY THE CLIMATE CONTROLLED SEAT BLOWER FAN OPERATION
NOTE: The climate controlled seat blower fan will only operate for 15 seconds when using the active command. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Operate the seat blower fan ON and OFF using the active command turn climate controlled seat blower full power and monitor the blower fan operation. Does the climate controlled seat blower fan operate?	Yes GO to J4. No GO to J9.
J4 CHECK CIRCUITS 1554 (WH) AND 1565 (VT) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver CCSM C3031b or Passenger CCSM C3036b. Disconnect: Driver Climate Controlled Seat Blower Fan C3033 or Passenger Climate Controlled Seat Blower Fan C3038. Key in ON position. Measure the voltage between driver CCSM C3031b-10 (or passenger CCSM C3036b-10), circuit 1565 (VT), harness side and ground; and between driver CCSM C3031b-14 (or passenger CCSM C3036b-14), circuit 1554 (WH), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to J6. No GO to J5
J5 CHECK CIRCUITS 1554 (WH) AND 1565 (VT) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver Climate Controlled Seat Blower Fan C3033 or Passenger Climate Controlled Seat Blower Fan C3038. Key in ON position. Measure the voltage between driver CCSM C3031a-10 (or passenger CCSM C3036a-10), circuit 1565 (VT), harness side and ground; and between driver CCSM C3031a-14 (or passenger CCSM C3036a-14), circuit 1554 (WH), harness side and ground. Are the voltages less than 0.2 volt?	Yes INSTALL a new climate controlled seat blower fan. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J6 CHECK CIRCUITS 1554 (WH) AND 1565 (VT) FOR SHORT TO GROUND
Key in OFF position. Measure the resistance between driver CCSM C3031b-10 (or passenger CCSM C3036b-10), circuit 1565 (VT), harness side and ground; and between driver CCSM C3031b-14 (or passenger CCSM C3036b-14), circuit 1554 (WH), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to J7. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J7 CHECK CIRCUITS 1554 (WH) AND 1565 (VT) FOR AN OPEN
Measure the resistance between driver CCSM C3031b-10 (or passenger CCSM C3036b-10), circuit 1565 (VT), harness side and driver climate controlled seat blower fan C3033-1 (or passenger climate controlled seat blower fan C3038-1), circuit 1565 (VT), harness side; and between driver CCSM C3031b-14 (or passenger CCSM C3036b-14), circuit 1554 (WH), harness side and driver climate controlled seat blower fan C3033-2 (or passenger climate controlled seat blower fan C3038-2), circuit 1554 (WH), harness side. Are the resistances less than 5 ohms?	Yes GO to J8. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J8 CHECK THE CLIMATE CONTROLLED SEAT BLOWER FAN OUTPUT
Connect: Driver Climate Controlled Seat Blower Fan C3033 or Passenger Climate Controlled Seat Blower Fan C3038. Connect fused (5A) jumper leads between driver CCSM C3031a (or passenger CCSM C3036a) as follows: Driver CCSM C3031b-10 (or passenger CCSM C3036b-10), circuit 1565 (VT), harness side and battery positive. Driver CCSM C3031b-13 (or passenger CCSM C3036b-13), circuit 1552 (RD), harness side and battery positive. Driver CCSM C3031b-3 (or passenger CCSM C3036b-3), circuit 1553 (BK), harness side and ground. Measure the voltage between driver CCSM C3031b-14 (or passenger CCSM C3036b-14), circuit 1554 (WH), harness side and ground. Are the voltages less than 0.2 volt? Is voltage present?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new climate controlled seat blower fan. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J9 CHECK CIRCUITS 1553 (BK) AND 1552 (RD) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver CCSM C3031b or Passenger CCSM C3036b. Disconnect: Driver Climate Controlled Seat Blower Fan C3033 or Passenger Climate Controlled Seat Blower Fan C3038. Key in ON position. Measure the voltage between driver CCSM C3031b-3 (or passenger CCSM C3036b-3), circuit 1553 (BK), harness side and ground; and between driver CCSM C3031b-13 (or passenger CCSM C3036b-13), circuit 1552 (RD), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to J10. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J10 CHECK CIRCUITS 1553 (BK) AND 1552 (RD) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between driver CCSM C3031b-3 (or passenger CCSM C3036b-3), circuit 1553 (BK), harness side and ground; and between driver CCSM C3031b-13 (or passenger CCSM C3036b-13), circuit 1552 (RD), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to J11. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J11 CHECK CIRCUITS 1553 (BK) AND 1552 (RD) FOR AN OPEN
Measure the resistance between driver CCSM C3031b-3 (or passenger CCSM C3036b-3), circuit 1553 (BK), harness side and driver climate controlled seat blower fan C3033-4 (or passenger climate controlled seat blower fan C3038-4), circuit 1553 (BK), harness side; and between driver CCSM C3031b-13 (or passenger CCSM C3036b-13), circuit 1552 (RD), harness side and driver climate controlled seat blower fan C3033-3 (or passenger climate controlled seat blower fan C3038-3), circuit 1552 (RD), harness side. Are the resistances less than 5 ohms?	Yes GO to J12. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
J12 CHECK THE CLIMATE CONTROLLED BLOWER FAN OPERATION
Connect: Driver Climate Controlled Seat Blower Fan C3033 or Passenger Climate Controlled Seat Blower Fan C3038. Connect fused (5A) jumper leads between driver CCSM C3031b (or passenger CCSM C3036b) as follows: Driver CCSM C3031b-10 (or passenger CCSM C3036b-10), circuit 1565 (VT), harness side and battery positive. Driver CCSM C3031b-13 (or passenger CCSM C3036b-13), circuit 1552 (RD), harness side and battery positive. Driver CCSM C3031b-3 (or passenger CCSM C3036b-3), circuit 1553 (BK), harness side and ground. Does the climate controlled seat blower fan operate?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new climate controlled seat blower fan. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test K: DTC B2729 — Cushion Overtemp Detected/DTC B2730 — Back Overtemp Detected/DTC B2731 — Differential Temperature Fault — Driver Seat

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

Each thermo-electric device (TED) contains an internal temperature sensor (thermistor) that is used by the climate controlled seat module (CCSM) to monitor the temperature of each TED. Based on the temperature of a TED, the internal sensor resistance will vary the voltage on circuit 1548 (DG/LG) (seat cushion TED) and circuit 1549 (DB/OG) (backrest TED).

Possible Causes

An overtemp or differential temperature fault can be caused by:

faulty wiring, terminals or connectors.
damaged, restricted or disconnected air ducts.
worn, damaged or incorrectly installed foam wedge, cushion foam or seat cushion trim cover.
airflow leaks.
collapsed airflow channels in the seat cushion foam.
incorrect installation of a TED.
a faulty TED.
a faulty CCSM.

PINPOINT TEST K: DTC B2729 — CUSHION OVERTEMP DETECTED/DTC B2730 — BACK OVERTEMP DETECTED/DTC B2731 — DIFFERENTIAL TEMPERATURE FAULT — DRIVER SEAT

Test Step	Result / Action to Take
K1 CHECK THE SEAT CUSHION TED EXHAUST NOZZLE FOR WASTE AIRFLOW
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Driver Safety Belt Buckle Pretensioner C323. Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323. Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Key in ON position. Set both front seats to LOW COOL (1 LED illuminated) at the electronic automatic temperature control (EATC) module. Check for air exhausting from the seat cushion TED exhaust nozzle and compare it to the air exhausting from the opposite seat. Is air exhausting from the seat cushion TED exhaust nozzle comparable to the air exhausting from the opposite seat?	Yes GO to K4. No GO to K2.
K2 INSPECT THE SEAT CUSHION DUCTS
Key in OFF position. Inspect the seat cushion ducts for damaged, restricted or disconnected ducts. Are any duct(s) damaged, restricted or disconnected?	Yes REPAIR or INSTALL new duct(s) as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to K3.
K3 INSPECT THE SEAT CUSHION TED FOR CORRECT INSTALLATION
Inspect the TED for correct installation to the seat cushion. Is the seat cushion TED correctly installed?	Yes REMOVE the seat and the seat cushion trim cover. INSPECT for a worn, damaged or incorrectly installed foam wedge, cushion foam or seat cushion trim cover. INSPECT for collapsed airflow channels in the seat cushion foam. REPAIR or INSTALL a new foam wedge, seat cushion foam or seat cushion trim cover as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL the seat cushion TED correctly. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K4 CHECK THE SEAT BACKREST TED EXHAUST NOZZLE FOR WASTE AIRFLOW
Set both front seats to LOW COOL (1 LED illuminated) at the electronic automatic temperature control (EATC) module. Check for air exhausting from the seat backrest TED exhaust nozzle and compare it to the air exhausting from the opposite seat. Is air exhausting from the seat backrest TED exhaust nozzle comparable to the air exhausting from the opposite seat?	Yes GO to K7. No GO to K5.
K5 INSPECT THE SEAT BACKREST DUCTS
Inspect the seat backrest ducts for damaged, restricted or disconnected ducts. Are any duct(s) damaged, restricted or disconnected?	Yes REPAIR or INSTALL new duct(s) as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to K6.
K6 INSPECT THE SEAT BACKREST TED FOR CORRECT INSTALLATION
Inspect the TED for correct installation to the seat backrest. Is the seat backrest TED correctly installed?	Yes REMOVE the seat and the seat backrest trim cover. INSPECT for a worn, damaged or incorrectly installed foam wedge, backrest foam or seat backrest trim cover. INSPECT for collapsed airflow channels in the seat backrest foam. REPAIR or INSTALL a new foam wedge, seat backrest foam or seat backrest trim cover as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL the seat backrest TED correctly. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K7 CHECK THE SEAT CUSHION AND SEAT BACKREST TEMPERATURE PIDs
Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu Thermo-Electric Device (TED) Heat Mode. NOTE: The climate controlled seat TED will only operate for 15 seconds when using the active command to activate. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Monitor the cushion TED temperature and backrest thermo-electric device TED temperature PIDs while commanding the active command TED heat mode ON. Is either PID value greater than 185°F (85°C)?	Yes If cushion TED temperature PID is greater than 185°F (85°C), GO to K8 . If backrest TED temperature PID is greater than 185°F (85°C), GO to K17 . No GO to K12.
K8 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver Seat Cushion TED C3035. Disconnect: Driver CCSM C3031b. Key in ON position. Measure the voltage between driver seat cushion TED C3035-3, circuit 1548 (DG/LG), harness side and ground; and between driver seat cushion TED C3035-2, circuit 2073 (BK/YE), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to K9. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K9 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between driver seat cushion TED C3035-3, circuit 1548 (DG/LG), harness side and ground; and between driver seat cushion TED C3035-2, circuit 2073 (BK/YE), harness side and ground. Is the resistance greater than 10,000 ohms?	Yes GO to K10. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K10 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR AN OPEN
Measure the resistance between driver seat cushion TED C3035-3, circuit 1548 (DG/LG), harness side and driver CCSM C3031b-18, circuit 1548 (DG/LG), harness side; and between driver seat cushion TED C3035-2, circuit 2073 (BK/YE), harness side and driver CCSM C3031b-17, circuit 2073 (BK/YE), harness side. Are the resistances less than 5 ohms?	Yes GO to K11. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K11 CHECK THE SEAT CUSHION TEMPERATURE SENSOR
Measure the resistance between the seat cushion TED pins 2 and 3, component side. Is the resistance greater than 1,000 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat cushion TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K12 CHECK THE SEAT CUSHION AND SEAT BACKREST TEMPERATURE PIDs
Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu Thermo-Electric Device (TED) Heat Mode. NOTE: The climate controlled seat TED will only operate for 15 seconds when using the active command to activate. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Monitor the cushion thermo-electric device (TED) temperature and backrest thermo-electric device TED temperature PIDs while commanding the active command thermo-electric device (TED) heat mode ON. Did the PID values change?	Yes REPAIR the climate controlled seat for airflow leaks. INSPECT the fan, TEDs, ducts, foam wedges, foam pads, trim covers and their connection points and REPAIR as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No If cushion thermo-electric device (TED) temperature PID does not change, GO to K13 . If backrest thermo-electric device TED temperature PID does not change, GO to K21 .
K13 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver Seat Cushion TED C3035. Disconnect: Driver CCSM C3031b. Key in ON position. Measure the voltage between driver seat cushion TED C3035-4, circuit 2072 (DG/YE), harness side and ground; and between driver seat cushion TED C3035-6, circuit 2071 (DB/WH), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to K14. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K14 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between driver seat cushion TED C3035-4, circuit 2072 (DG/YE), harness side and ground; and between driver seat cushion TED C3035-6, circuit 2071 (DB/WH), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to K15. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K15 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR AN OPEN
Measure the resistance between driver seat cushion TED C3035-4, circuit 2072 (DG/YE), harness side and driver CCSM C3031b-2, circuit 2072 (DG/YE), harness side; and between driver seat cushion TED C3035-6, circuit 2071 (DB/WH), harness side and driver CCSM C3031b-1, circuit 2071 (DB/WH), harness side. Are the resistances less than 5 ohms?	Yes GO to K16. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K16 CHECK THE SEAT CUSHION TED
Measure the resistance between seat cushion TED pins 4 and 6, component side. Is the resistance between 0.5 and 7 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat cushion TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K17 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver Seat Backrest TED C3034. Disconnect: Driver CCSM C3031b. Key in ON position. Measure the voltage between driver seat backrest TED C3034-3, circuit 1549 (DB/OG), harness side and ground; and between driver seat backrest TED C3034-2, circuit 2076 (BK/PK), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to K18. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K18 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR A SHORT TO GROUND
Measure the resistance between driver seat backrest TED C3034-3, circuit 1549 (DB/OG), harness side and ground; and between driver seat backrest TED C3034-2, circuit 2076 (BK/PK), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to K19. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K19 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR AN OPEN
Measure the resistance between driver seat backrest TED C3034-3, circuit 1549 (DB/OG), harness side and driver CCSM C3031b-19, circuit 1549 (DB/OG), harness side; and between driver seat backrest TED C3034-2, circuit 2076 (BK/PK), harness side and driver CCSM C3031b-20, circuit 2076 (BK/PK), harness side. Are the resistances less than 5 ohms?	Yes GO to K20. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K20 CHECK THE SEAT BACKREST TEMPERATURE SENSOR
Measure the resistance between the seat backrest TED pins 2 and 3, component side. Is the resistance greater than 1,000 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat backrest TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K21 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Driver Seat Backrest TED C3034. Disconnect: Driver CCSM C3031b. Key in ON position. Measure the voltage between driver seat backrest TED C3034-4, circuit 2075 (WH/LB), harness side and ground; and between driver seat backrest TED C3034-6, circuit 2074 (LB/BK), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to K22. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K22 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR A SHORT TO GROUND
Measure the resistance between driver seat backrest TED C3034-4, circuit 2075 (WH/LB), harness side and ground; and between driver seat backrest TED C3034-6, circuit 2074 (LB/BK), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to K23. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K23 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR AN OPEN
Measure the resistance between driver seat backrest TED C3034-4, circuit 2075 (WH/LB), harness side and driver CCSM C3031b-12, circuit 2075 (WH/LB), harness side; and between driver seat backrest TED C3034-6, circuit 2074 (LB/BK), harness side and driver CCSM C3031b-11, circuit 2074 (LB/BK), harness side. Are the resistances less than 5 ohms?	Yes GO to K24. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
K24 CHECK THE SEAT BACKREST TED
Measure the resistance between the seat backrest TED pins 4 and 6, component side. Is the resistance between 0.5 and 7 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat backrest TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test L: DTC B2729 — Cushion Overtemp Detected/DTC B2730 — Back Overtemp Detected/DTC B2731 — Differential Temperature Fault — Passenger Seat

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

Possible Causes

An overtemp or differential temperature fault can be caused by:

wiring, terminals or connectors.
damaged, restricted or disconnected air ducts.
worn, damaged or incorrectly installed foam wedge, cushion foam or seat cushion trim cover.
airflow leaks.
collapsed airflow channels in the seat cushion foam.
incorrect installation of a TED.
a faulty TED.
a faulty CCSM.

PINPOINT TEST L: DTC B2729 — CUSHION OVERTEMP DETECTED/DTC B2730 — BACK OVERTEMP DETECTED/DTC B2731 — DIFFERENTIAL TEMPERATURE FAULT — PASSENGER SEAT

Test Step	Result / Action to Take
L1 CHECK THE SEAT CUSHION TED EXHAUST NOZZLE FOR WASTE AIRFLOW
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Passenger Safety Belt Buckle Pretensioner C303. Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303. Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Key in ON position. Set both front seats to the LOW COOL (1 LED illuminated) at the electronic automatic temperature control (EATC) module. Check for air exhausting from the seat cushion TED exhaust nozzle and compare it to the air exhausting from the opposite seat. Is air exhausting from the seat cushion TED exhaust nozzle comparable to the air exhausting from the opposite seat?	Yes GO to L4. No GO to L2.
L2 INSPECT THE SEAT CUSHION DUCTS
Key in OFF position. Inspect the seat cushion ducts for damaged, restricted or disconnected ducts. Are any duct(s) damaged, restricted or disconnected?	Yes REPAIR or INSTALL new duct(s) as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to L3.
L3 INSPECT THE SEAT CUSHION TED FOR CORRECT INSTALLATION
Inspect the TED for correct installation to the seat cushion. Is the seat cushion TED correctly installed?	Yes REMOVE the seat and the seat cushion trim cover. INSPECT for a worn, damaged or incorrectly installed foam wedge, cushion foam or seat cushion trim cover. INSPECT for collapsed airflow channels in the seat cushion foam. REPAIR or INSTALL a new foam wedge, seat cushion foam or seat cushion trim cover as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL the seat cushion TED correctly. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L4 CHECK THE SEAT BACKREST TED EXHAUST NOZZLE FOR WASTE AIRFLOW
Set both front seats to LOW COOL (1 LED illuminated) at the electronic automatic temperature control (EATC) module. Check for air exhausting from the seat backrest TED exhaust nozzle and compare it to the air exhausting from the opposite seat. Is air exhausting from the seat backrest TED exhaust nozzle comparable to the air exhausting from the opposite seat?	Yes GO to L7. No GO to L5.
L5 INSPECT THE SEAT BACKREST DUCTS
Inspect the seat backrest ducts for damaged, restricted or disconnected ducts. Are any duct(s) damaged, restricted or disconnected?	Yes REPAIR or INSTALL new duct(s) as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to L6.
L6 INSPECT THE SEAT BACKREST TED FOR CORRECT INSTALLATION
Inspect the TED for correct installation to the seat cushion. Is the seat backrest TED correctly installed?	Yes REMOVE the seat and the seat backrest trim cover. INSPECT for a worn, damaged or incorrectly installed foam wedge, backrest foam or seat backrest trim cover. INSPECT for collapsed airflow channels in the seat backrest foam. REPAIR or INSTALL a new foam wedge, seat backrest foam or seat backrest trim cover as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL the seat backrest TED correctly. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L7 CHECK THE SEAT CUSHION AND SEAT BACKREST TEMPERATURE PIDs
Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu Thermo-Electric Device (TED) Heat Mode. NOTE: The climate controlled seat TED will only operate for 15 seconds when using the active command to activate. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Monitor the cushion TED temperature and backrest thermo-electric device TED temperature PIDs while commanding the active command TED heat mode ON. Is either PID greater than 185°F (85°C)?	Yes If cushion TED temperature PID is greater than 185°F (85°C), GO to L8 . If backrest TED temperature PID is greater than 185°F (85°C), GO to L17 . No GO to L12.
L8 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Passenger Seat Cushion TED C3040. Disconnect: Passenger CCSM C3036b. Key in ON position. Measure the voltage between passenger seat cushion TED C3040-3, circuit 1548 (DG/LG), harness side and ground; and between passenger seat cushion TED C3040-2, circuit 2073 (BK/YE), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to L9. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L9 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between passenger seat cushion TED C3040-3, circuit 1548 (DG/LG), harness side and ground; and between passenger seat cushion TED C3040-2, circuit 2073 (BK/YE), harness side and ground. Is the resistance greater than 10,000 ohms?	Yes GO to L10. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L10 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR AN OPEN
Measure the resistance between passenger seat cushion TED C3040-3, circuit 1548 (DG/LG), harness side and passenger CCSM C3036b-18, circuit 1548 (DG/LG), harness side; and between passenger seat cushion TED C3040-2, circuit 2073 (BK/YE), harness side and passenger CCSM C3036b-17, circuit 2073 (BK/YE), harness side. Are the resistances less than 5 ohms?	Yes GO to L11. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L11 CHECK THE SEAT CUSHION TEMPERATURE SENSOR
Measure the resistance between the seat cushion TED pins 3 and 2, component side. Is the resistance greater than 1,000 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat cushion TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L12 CHECK THE SEAT CUSHION AND SEAT BACKREST TEMPERATURE PIDs
Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu Thermo-Electric Device (TED) Heat Mode. NOTE: The climate controlled seat TED will only operate for 15 seconds when using the active command to activate. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Monitor the cushion TED temperature and backrest thermo-electric device TED temperature PIDs while commanding the active command TED heat mode ON. Did the PID values change?	Yes REPAIR the climate controlled seat for airflow leaks. INSPECT the fan, TEDs, ducts, foam wedges, foam pads, trim covers and their connection points and REPAIR as needed. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No If cushion TED temperature PID does not change, GO to L13 . If backrest thermo-electric device TED temperature PID does not change, GO to L21 .
L13 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Passenger Seat Cushion TED C3040. Disconnect: Passenger CCSM C3036b. Key in ON position. Measure the voltage between passenger seat cushion TED C3040-4, circuit 2072 (DG/YE), harness side and ground; and between passenger seat cushion TED C3040-6, circuit 2071 (DB/WH), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to L14. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L14 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between passenger seat cushion TED C3040-4, circuit 2072 (DG/YE), harness side and ground; and between passenger seat cushion TED C3040-6, circuit 2071 (DB/WH), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to L15. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L15 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR AN OPEN
Measure the resistance between passenger seat cushion TED C3040-4, circuit 2072 (DG/YE), harness side and passenger CCSM C3036b-2, circuit 2072 (DG/YE), harness side; and between passenger seat cushion TED C3040-6, circuit 2071 (DB/WH), harness side and passenger CCSM C3036b-1, circuit 2071 (DB/WH), harness side. Are the resistances less than 5 ohms?	Yes GO to L16. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L16 CHECK THE SEAT CUSHION TED
Measure the resistance between seat cushion TED pins 4 and 6, component side. Is the resistance between 0.5 and 7 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat cushion TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L17 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Passenger Seat Backrest TED C3039. Disconnect: Passenger CCSM C3036b. Key in ON position. Measure the voltage between passenger seat backrest TED C3039-3, circuit 1549 (DB/OG), harness side and ground; and between passenger seat backrest TED C3039-2, circuit 2076 (BK/PK), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to L18. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L18 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR A SHORT TO GROUND
Measure the resistance between passenger seat backrest TED C3039-3, circuit 1549 (DB/OG), harness side and ground; and between passenger seat backrest TED C3039-2, circuit 2076 (BK/PK), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to L19. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L19 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR AN OPEN
Measure the resistance between passenger seat backrest TED C3039-3, circuit 1549 (DB/OG), harness side and passenger CCSM C3036b-19, circuit 1549 (DB/OG), harness side; and between passenger seat backrest TED C3039-2, circuit 2076 (BK/PK), harness side and passenger CCSM C3036b-20, circuit 2076 (BK/PK), harness side. Are the resistances less than 5 ohms?	Yes GO to L20. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L20 CHECK THE SEAT BACKREST TEMPERATURE SENSOR
Measure the resistance between seat backrest TED pins 2 and 3, component side. Is the resistance greater than 1,000 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat backrest TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L21 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Passenger Seat Backrest TED C3039. Disconnect: Passenger CCSM C3036b. Key in ON position. Measure the voltage between passenger seat backrest TED C3039-4, circuit 2075 (WH/LB), harness side and ground; and between passenger seat backrest TED C3039-6, circuit 2074 (LB/BK), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to L22. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L22 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR A SHORT TO GROUND
Measure the resistance between passenger seat backrest TED C3039-4, circuit 2075 (WH/LB), harness side and ground; and between passenger seat backrest TED C3039-6, circuit 2074 (LB/BK), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to L23. No REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L23 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR AN OPEN
Measure the resistance between passenger seat backrest TED C3039-4, circuit 2075 (WH/LB), harness side and passenger CCSM C3036b-12, circuit 2075 (WH/LB), harness side; and between passenger seat backrest TED C3039-6, circuit 2074 (LB/BK), harness side and passenger CCSM C3036b-11, circuit 2074 (LB/BK), harness side. Are the resistances less than 5 ohms?	Yes GO to L24. No REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
L24 CHECK THE SEAT BACKREST TED
Measure the resistance between seat backrest TED pins 4 and 6, component side. Is the resistance between 0.5 and 7 ohms?	Yes INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new seat backrest TED. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test M: A Single Climate Controlled Seat Does Not Operate/Does Not Operate Correctly

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

The climate controlled seat module (CCSM) controls are incorporated into the electronic automatic temperature control (EATC) module. The EATC module communicates with the CCSM via the UBP bus.

Possible Causes

A climate controlled seat that does not operate or does not operate correctly can be caused by:

wiring, terminals or connectors.
UBP network communication fault.
EATC module.
CCSM.

PINPOINT TEST M: A SINGLE CLIMATE CONTROLLED SEAT DOES NOT OPERATE/DOES NOT OPERATE CORRECTLY

Test Step	Result / Action to Take
M1 CHECK FOR CCSM DTCs
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: The Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Connect: Restraint System Diagnostic Tool 501-097 to the Safety Belt Buckle Pretensioner C323 (Driver) and C303 (Passenger). Disconnect: The Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Seat Side Air Bag C367 (Driver) and C337 (Passenger) (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Connect the diagnostic tool. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: On-Demand Self-Test. Were any DTCs retrieved?	Yes GO to the Climate Controlled Seat Module (CCSM) Diagnostic Trouble Code (DTC) Index. No If the scan tool communicates with the CCSM, GO to M2 . If the scan tool does not communicate with the CCSM, REFER to Section 418-00.
M2 CHECK FOR EATC MODULE DTCs
Enter the following diagnostic mode on the diagnostic tool: On-Demand Self-Test. Were any DTCs retrieved?	Yes GO to Section 412-00. No If the scan tool communicates with the EATC module, GO to M3 . If the scan tool does not communicate with the EATC module, GO to Section 418-00.
M3 CHECK THE EATC MODULE-TO-CCSM COMMUNICATION
Key in OFF position. Connect: Driver CCSM C3031a or Passenger CCSM C3036a. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: CCSM PID EATC State Encoded Seat Mode. Monitor the CCSM PID EATC state encoded seat mode with the EATC module placed in the following climate controlled seat settings: high heat (press HEAT button, 3 LEDs illuminated). medium heat (press HEAT button, 2 LEDs illuminated). low heat (press HEAT button, 1 LED illuminated). high cool (press COOL button, 3 LEDs illuminated). medium cool (press COOL button, 2 LEDs illuminated). low cool (press COOL button, 1 LED illuminated). AUTO mode (press COOL and HEAT buttons simultaneously, center LED only illuminated). Does the CCSM PID match the EATC module setting?	Yes The climate controlled seat system is operating correctly. No GO to M4.
M4 CHECK THE CCSM
Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu Thermo-Electric Device (TED) Heat Mode. Enter the following diagnostic mode on the diagnostic tool: CCSM PID EATC State Encoded Seat Mode. NOTE: The climate controlled seat TED will only operate for 15 seconds when using the active command to activate. NOTE: The CCSM is not the source of the fault if the active command mode is operational. Monitor the CCSM PID EATC state encoded seat mode while commanding the thermo-electric device (TED) heat mode active command ON then OFF. Does the CCSM go into HEAT mode?	Yes INSTALL a new EATC module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new CCSM and CARRY OUT programmable module installation (PMI). REFER to Climate Controlled Seat Module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tools from safety belt buckle pretensioner C323 (driver) and C303 (passenger). CONNECT safety belt buckle pretensioner C323 (driver) and C303 (passenger). For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tools from seat side air bag C367 (driver), C337 (passenger). CONNECT seat side air bag C367 (driver), C337 (passenger). REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test N: The Heated Seat Is Inoperative — Driver

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

The driver and passenger heated seat modules share a common ignition feed and have a separate battery and ground source. The electronic automatic temperature control (EATC) module includes the heated seat control buttons and indicators. The heated seat system will function when the EATC module is ON or OFF. When a heated seat control button on the EATC module is pressed with the ignition switch in RUN or START, a momentary ground signal is sent to the heated seat module. Upon receiving a signal, the heated seat module will decrease one setting (the sequence is HI, LO, OFF, HI, etc.). When the heated seat system is ON, the heated seat module then supplies power to the heater mat circuit. The cushion and backrest heater mats are wired in series and powered by the same output. The heated seat module will remain on until the heated seat control button is pressed to cycle the heated seat module to the OFF state. If the ignition source is removed from the module, the heated seat module will enter an OFF state and will not return to ON until the heated seat control button is once again pressed with the ignition switch in RUN.

Possible Causes

An inoperative heated seat can be caused by:

an open fuse.
faulty wiring, terminals or connectors.
a faulty heater mat.
a faulty heated seat module.
a faulty EATC module.

PINPOINT TEST N: THE HEATED SEAT IS INOPERATIVE — DRIVER

Test Step	Result / Action to Take
N1 CHECK VOLTAGE TO THE HEATED SEAT MODULE
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Driver Safety Belt Buckle Pretensioner C323. Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323. Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Driver Heated Seat Module C359. Key in ON position. Measure the voltage between driver heated seat module C359-12, circuit 566 (DG), harness side and ground; and between driver heated seat module C359-5, circuit 294 (WH/LB), harness side and ground. Are the voltages greater than 10 volts?	Yes GO to N2. No VERIFY the bussed electrical center (BEC) fuse 11 (30A) or smart junction box (SJB) fuse 13 (5A) are OK. If OK, REPAIR circuit 566 (DG) or circuit 294 (WH/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N2 CHECK THE HEATED SEAT MODULE GROUND
Key in OFF position. Measure the resistance between driver heated seat module C359-1, circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes GO to N3. No REPAIR circuit 1205 (BK). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N3 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
Key in ON position. Measure the voltage between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and ground; and between C359-4, circuit 1060 (BK/LB), harness side and ground. Is voltage present on either circuit?	Yes REPAIR circuit 1061 (BN/LB) or circuit 1060 (BK/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to N4.
N4 CHECK THE HEATED SEAT TEMPERATURE SENSOR
Key in OFF position. Measure the resistance between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and C359-4, circuit 1060 (BK/LB), harness side; and between C359-3, circuit 1061 (BN/LB), harness side and ground. Is the resistance less than 300,000 ohms and greater than 50 ohms between C359-3 and C359-4 and greater than 10,000 ohms between C359-3 and ground?	Yes GO to N7. No GO to N5.
N5 CHECK CIRCUIT 1060 (BK/LB) FOR AN OPEN OR SHORT TO GROUND
Disconnect: Driver Seat Cushion Heater C364. Measure the resistance between driver heated seat module C359-4, circuit 1060 (BK/LB), harness side and driver seat cushion heater C364-2, circuit 1060 (BK/LB), harness side; and between driver heated seat module C359-4, circuit 1060 (BK/LB), harness side and ground. Is the resistance less than 5 ohms between C359-4 and C364-2 and greater than 10,000 ohms between C359-4 and ground?	Yes GO to N6. No REPAIR circuit 1060 (BK/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N6 CHECK CIRCUIT 1061 (BN/LB) FOR AN OPEN OR SHORT TO GROUND
Measure the resistance between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and driver seat cushion heater C364-3, circuit 1061 (BN/LB), harness side; and between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and ground. Is the resistance less than 5 ohms between C359-3 and C364-3 and greater than 10,000 ohms between C359-3 and ground?	Yes INSTALL a new driver seat cushion heater mat. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 1061 (BN/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N7 CHECK THE SEAT CUSHION AND BACKREST HEATER MATS FOR A SHORT TO VOLTAGE
Key in ON position. Measure the voltage between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and ground; and between C359-7, circuit 1067 (VT/LB), harness side and ground. Is voltage present on either circuit?	Yes REPAIR circuit 1064 (YE/LB) or circuit 1067 (VT/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to N8.
N8 CHECK THE SEAT CUSHION AND BACKREST HEATER CIRCUITS
Key in OFF position. Measure the resistance between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and C359-7, circuit 1067 (VT/LB), harness side; and between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and ground Is the resistance greater than 1.6 ohms and less than 10 ohms between C359-6 and C359-7 and greater than 10,000 ohms between C359-6 and ground?	Yes GO to N12. No GO to N9.
N9 CHECK CIRCUIT 1064 (YE/LB) FOR AN OPEN OR SHORT TO GROUND
Disconnect: Driver Seat Cushion Heater C364. Measure the resistance between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and driver seat cushion heater C364-1, circuit 1064 (YE/LB), harness side; and between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and ground. Is the resistance less than 5 ohms between C359-6 and C364-1 and greater than 10,000 ohms between C359-6 and ground?	Yes GO to N10. No REPAIR circuit 1064 (YE/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N10 CHECK CIRCUIT 1067 (VT/LB) FOR AN OPEN OR SHORT TO GROUND
Measure the resistance between driver heated seat module C359-7, circuit 1067 (VT/LB), harness side and driver seat cushion heater C364-4, circuit 1067 (VT/LB), harness side; and between driver heated seat module C359-7, circuit 1067 (VT/LB), harness side and ground. Is the resistance less than 5 ohms between C359-7 and C364-4 and greater than 10,000 ohms between C359-7 and ground?	Yes GO to N11. No REPAIR circuit 1067 (VT/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N11 CHECK THE DRIVER SEAT BACKREST HEATER
Disconnect: Driver Seat Backrest Heater 2-Pin Connector. Measure the resistance between driver seat backrest heater connector pins 1 and 2, component side. Is the resistance between 0.6 and 1.2 ohms?	Yes INSTALL a new driver seat cushion heater mat. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new driver seat backrest heater mat. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N12 CHECK CIRCUIT 1255 (WH/RD) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: EATC Module C228b. Key in ON position. Measure the voltage between driver heated seat module C359-8, circuit 1255 (WH/RD), harness side and ground. Is the voltage less than 0.2 volt?	Yes GO to N13. No REPAIR circuit 1255 (WH/RD). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N13 CHECK CIRCUIT 1255 (WH/RD) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between driver heated seat module C359-8, circuit 1255 (WH/RD), harness side and ground. Is the resistance greater than 10,000 ohms?	Yes GO to N14. No REPAIR circuit 1255 (WH/RD). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N14 CHECK CIRCUIT 1255 (WH/RD) FOR AN OPEN
Measure the resistance between driver heated seat module C359-8, circuit 1255 (WH/RD), harness side and EATC module C228b-6, circuit 1255 (WH/RD), harness side. Is the resistance less than 5 ohms?	Yes GO to N15. No REPAIR circuit 1255 (WH/RD). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N15 CHECK THE HEATED SEAT MODULE
Connect: Driver Heated Seat Module C359. Key in ON position. Measure the voltage between EATC module C228b-7, circuit 2070 (GY/LB), harness side and ground; and between EATC module C228b-8, circuit 2069 (VT/LG), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to N17. No GO to N16.
N16 CHECK CIRCUITS 2070 (GY/LB) AND 2069 (VT/LG) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Heated Seat Module C359. Key in ON position. Measure the voltage between EATC module C228b-7, circuit 2070 (GY/LB), harness side and ground; and between EATC module C228b-8, circuit 2069 (VT/LG), harness side and ground. Are the voltages less than 0.2 volt?	Yes INSTALL a new heated seat module. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR the affected circuits. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N17 CHECK CIRCUITS 2070 (GY/LB) AND 2069 (VT/LG) FOR A SHORT
Key in OFF position. Measure the resistance between EATC module C228b-7, circuit 2070 (GY/LB), harness side and C228b-8, circuit 2069 (VT/LG), harness side. Is the resistance greater than 10,000 ohms?	Yes GO to N18. No REPAIR circuits 2070 (GY/LB) and 2069 (VT/LG). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
N18 CHECK THE EATC MODULE OUTPUT
Connect: EATC Module C228b. Connect: Driver Heated Seat Module C359. Key in ON position. NOTE: The voltage on circuit 2069 (VT/LG) should drop momentarily when the driver heated seat control button is pressed. Measure the voltage between driver heated seat module C359-8, circuit 2069 (VT/LG), harness side and ground by back-probing the driver heated seat module C359-8. Press the driver heated seat control button on the EATC module and note the voltage. Is the voltage greater than 10 volts when the driver heated seat control button is not pressed then momentarily drop when the heated seat control button is pressed?	Yes INSTALL a new driver heated seat module. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No If the voltage is greater than 10 volts but did not drop when the driver heated seat button was pressed, INSTALL a new EATC module. REFER to Section 412-01. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. CLEAR the DTCs. REPEAT the self-test. If the voltage is less than 10 volts, INSTALL a new driver heated seat module. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test O: The Heated Seat Is Inoperative — Passenger

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

Possible Causes

An inoperative heated seat can be caused by:

an open fuse.
faulty wiring, terminals or connectors.
a faulty heater mat.
a faulty heated seat module.
a faulty EATC module.

PINPOINT TEST O: THE HEATED SEAT IS INOPERATIVE — PASSENGER

Test Step	Result / Action to Take
O1 CHECK VOLTAGE TO THE HEATED SEAT MODULE
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Passenger Safety Belt Buckle Pretensioner C303. Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303. Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: Passenger Heated Seat Module C329. Key in ON position. Measure the voltage between passenger heated seat module C329-12, circuit 51 (BK/WH), harness side and ground; and between passenger heated seat module C329-5, circuit 294 (WH/LB), harness side and ground. Are the voltages greater than 10 volts?	Yes GO to O2. No VERIFY the bussed electrical center (BEC) fuse 15 (30A) or smart junction box (SJB) fuse 13 (5A) are OK. If OK, REPAIR circuit 51 (BK/WH) or circuit 294 (WH/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O2 CHECK THE HEATED SEAT MODULE GROUND
Key in OFF position. Measure the resistance between passenger heated seat module C329-1, circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes GO to O3. No REPAIR circuit 1205 (BK). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O3 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
Key in ON position. Measure the voltage between passenger heated seat module C329-3, circuit 1061 (BN/LB), harness side and ground; and between C329-4, circuit 1060 (BK/LB), harness side and ground. Is voltage present on either circuit?	Yes REPAIR circuit 1060 (BK/LB) or circuit 1061 (BN/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to O4.
O4 CHECK THE HEATED SEAT TEMPERATURE SENSOR
Key in OFF position. Measure the resistance between passenger heated seat module C329-3, circuit 1061 (BN/LB), harness side and C329-4, circuit 1060 (BK/LB), harness side; and between C329-3, circuit 1061 (BN/LB), harness side and ground. Is the resistance less than 300,000 ohms and greater than 50 ohms between C329-3 and C329-4 and greater than 10,000 ohms between C329-3 and ground?	Yes GO to O7. No GO to O5.
O5 CHECK CIRCUIT 1060 (BK/LB) FOR AN OPEN OR SHORT TO GROUND
Disconnect: Passenger Seat Cushion Heater C334. Measure the resistance between passenger heated seat module C329-4, circuit 1060 (BK/LB), harness side and passenger seat cushion heater C334-2, circuit 1060 (BK/LB), harness side; and between passenger heated seat module C329-4, circuit 1060 (BK/LB), harness side and ground. Is the resistance less than 5 ohms between C329-4 and C334-2 and greater than 10,000 ohms between C329-4 and ground?	Yes GO to O6. No REPAIR circuit 1060 (BK/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O6 CHECK CIRCUIT 1061 (BN/LB) FOR AN OPEN OR SHORT TO GROUND
Measure the resistance between passenger heated seat module C329-3, circuit 1061 (BN/LB), harness side and driver seat cushion heater C334-3, circuit 1061 (BN/LB), harness side; and between passenger heated seat module C329-3, circuit 1061 (BN/LB), harness side and ground. Is the resistance less than 5 ohms between C329-3 and C334-3 and greater than 10,000 ohms between C329-3 and ground?	Yes INSTALL a new passenger seat cushion heater mat. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR circuit 1061 (BN/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O7 CHECK THE SEAT CUSHION AND BACKREST HEATERS FOR A SHORT TO VOLTAGE
Key in ON position. Measure the voltage between passenger heated seat module C329-6, circuit 1064 (YE/LB), harness side and ground; and between C329-7, circuit 1067 (VT/LB), harness side and ground. Is voltage present on either circuit?	Yes REPAIR circuit 1064 (YE/LB), circuit 1067 (VT/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No GO to O8.
O8 CHECK THE SEAT CUSHION AND BACKREST HEATER CIRCUITS
Key in OFF position. Measure the resistance between passenger heated seat module C329-6, circuit 1064 (YE/LB), harness side and C329-7, circuit 1067 (VT/LB), harness side; and between passenger heated seat module C329-6, circuit 1064 (YE/LB), harness side and ground Is the resistance greater than 1.6 ohms and less than 10 ohms between C329-6 and C329-7 and greater than 10,000 ohms between C329-6 and ground?	Yes GO to O12. No GO to O9.
O9 CHECK CIRCUIT 1064 (YE/LB) FOR AN OPEN OR SHORT TO GROUND
Disconnect: Passenger Seat Cushion Heater C334. Measure the resistance between passenger heated seat module C329-6, circuit 1064 (YE/LB), harness side and passenger seat cushion heater C334-1, circuit 1064 (YE/LB), harness side; and between passenger heated seat module C329-6, circuit 1064 (YE/LB), harness side and ground. Is the resistance less than 5 ohms between C329-6 and C334-1 and greater than 10,000 ohms between C329-6 and ground?	Yes GO to O10. No REPAIR circuit 1064 (YE/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O10 CHECK CIRCUIT 1067 (VT/LB) FOR AN OPEN OR SHORT TO GROUND
Measure the resistance between passenger heated seat module C329-7, circuit 1067 (VT/LB), harness side and passenger seat backrest heater C334-4, circuit 1067 (VT/LB), harness side; and between passenger heated seat module C329-7, circuit 1067 (VT/LB), harness side and ground. Is the resistance less than 5 ohms between C329-7 and C334-1 and greater than 10,000 ohms between C329-7 and ground?	Yes GO to O11. No REPAIR circuit 1067 (VT/LB). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O11 CHECK THE PASSENGER SEAT BACKREST HEATER
Disconnect: Passenger Seat Backrest Heater 2-Pin Connector. Measure the resistance between passenger seat backrest heater connector pins 1 and 2, component side. Is the resistance between 0.6 and 1.2 ohms?	Yes INSTALL a new passenger seat cushion heater mat. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new passenger seat backrest heater mat. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O12 CHECK CIRCUIT 1256 (WH/YE) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: EATC Module C228b. Key in ON position. Measure the voltage between passenger heated seat module C329-8, circuit 1256 (WH/YE), harness side and ground. Is the voltage less than 0.2 volt?	Yes GO to O13. No REPAIR circuit 1256 (WH/YE). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O13 CHECK CIRCUIT 1256 (WH/YE) FOR A SHORT TO GROUND
Key in OFF position. Measure the resistance between passenger heated seat module C329-8, circuit 1256 (WH/YE), harness side and ground. Is the resistance greater than 10,000 ohms?	Yes GO to O14. No REPAIR circuit 1256 (WH/YE). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O14 CHECK CIRCUIT 1256 (WH/YE) FOR AN OPEN
Measure the resistance between passenger heated seat module C329-8, circuit 1256 (WH/YE), harness side and EATC module C228b-15, circuit 1256 (WH/YE), harness side. Is the resistance less than 5 ohms?	Yes GO to O15. No REPAIR circuit 1256 (WH/YE). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O15 CHECK THE HEATED SEAT MODULE
Connect: Passenger Heated Seat Module C329. Key in ON position. Measure the voltage between EATC module C228b-16, circuit 580 (BN), harness side and ground; and between EATC module C228b-17, circuit 579 (BK/OG), harness side and ground. Are the voltages less than 0.2 volt?	Yes GO to O17. No GO to O16.
O16 CHECK CIRCUITS 579 (BK/OG) AND 580 (BN) FOR A SHORT TO VOLTAGE
Key in OFF position. Disconnect: Passenger Heated Seat Module C329. Key in ON position. Measure the voltage between EATC module C228b-16, circuit 580 (BN), harness side and ground; and between EATC module C228b-17, circuit 579 (BK/OG), harness side and ground. Are the voltages less than 0.2 volt?	Yes INSTALL a new heated seat module. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No REPAIR the affected circuits. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O17 CHECK CIRCUITS 579 (BK/OG) AND 580 (BN) FOR A SHORT
Key in OFF position. Measure the resistance between EATC module C228b-16, circuit 580 (BN), harness side and C228b-17, circuit 579 (BK/OG), harness side. Is the resistance greater than 10,000 ohms?	Yes GO to O18. No REPAIR circuits 579 (BK/OG) and 580 (BN). TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
O18 CHECK THE EATC MODULE OUTPUT
Connect: EATC Module C228b. Connect: Passenger Heated Seat Module C329. Key in ON position. NOTE: The voltage on circuit 1256 (WH/YE) should drop momentarily when the passenger heated seat control button is pressed. Measure the voltage between passenger heated seat module C329-8, circuit 1256 (WH/YE), harness side and ground by back-probing the passenger heated seat module C329-8. Press the passenger heated seat control button on the EATC module and note the voltage. Is the voltage greater than 10 volts when the passenger heated seat control button is not pressed then momentarily drop when the heated seat control button is pressed?	Yes INSTALL a new passenger heated seat module. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No If the voltage is greater than 10 volts but did not drop when the driver heated seat button was pressed, INSTALL a new EATC module. REFER to Section 412-01. CLEAR the DTCs. REPEAT the self-test. If the voltage is less than 10 volts, INSTALL a new driver heated seat module. TEST the system for normal operation. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test P: The Heated Seat Does Not Operate Correctly — Seat Does Heat But The Heated Seat Indicator Does Not Illuminate When Pressed, Driver

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

Upon receiving a signal from the electronic automatic temperature control (EATC) module, the heated seat module will decrease one setting (the sequence is HI, LO, OFF, HI, etc.). When a heated seat is set to HI, both LED indicators above the heated seat control button will illuminate. When a heated seat is set to LO, only the left LED indicator will illuminate. When a heated seat is set to OFF, neither LED will be illuminated.

Possible Causes

An inoperative heated seat indicator can be caused by:

faulty wiring, terminals or connectors.
a faulty heated seat module.
a faulty EATC module.

PINPOINT TEST P: THE HEATED SEAT DOES NOT OPERATE CORRECTLY — SEAT DOES HEAT BUT THE HEATED SEAT INDICATOR DOES NOT ILLUMINATE WHEN PRESSED, DRIVER

Test Step	Result / Action to Take
P1 CHECK FOR EATC MODULE DTCs
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Enter the following diagnostic mode on the diagnostic tool: Retrieve and Document Continuous DTCs From the EATC Module. Enter the following diagnostic mode on the diagnostic tool: Clear the EATC Module Continuous DTCs. Enter the following diagnostic mode on the diagnostic tool: EATC Module On-Demand Self-Test. Was DTC B2963 retrieved?	Yes Go To Pinpoint Test N. No GO to P2.
P2 CHECK CIRCUITS 2070 (GY/LB) AND 2069 (VT/LG) FOR A SHORT TO GROUND
Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Driver Safety Belt Buckle Pretensioner C323. Connect: Restraint System Diagnostic Tool 501-097 to the Driver Safety Belt Buckle Pretensioner C323. Disconnect: Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Driver Seat Side Air Bag C367 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: EATC Module C228b. Disconnect: Driver Heated Seat Module C359. Measure the resistance between EATC module C228b-7, circuit 2070 (GY/LB), harness side and ground; and between EATC module C228b-8, circuit 2069 (VT/LG), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to P3. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
P3 CHECK CIRCUITS 2070 (GY/LB) AND 2069 (VT/LG) FOR AN OPEN
Key in ON position. Measure the resistance between EATC module C228b-7, circuit 2070 (GY/LB), harness side and driver heated seat module C359-9, circuit 2070 (GY/LB), harness side; and between EATC module C228b-8, circuit 2069 (VT/LG), harness side and driver heated seat module C359-10, circuit 2069 (VT/LG), harness side. Are the resistances less than 5 ohms?	Yes GO to P4. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
P4 CHECK THE HEATED SEAT MODULE HI INDICATOR ON THE EATC MODULE
Connect: EATC Module C228b. Key in ON position. Connect a 5A fused jumper lead between driver heated seat module C359-10, circuit 2069 (VT/LG), harness side and C359-12, circuit 566 (DG), harness side. Do both driver heated seat indicator LEDs illuminate on the EATC module?	Yes GO to P5. No INSTALL a new EATC module. REFER to Section 412-01. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
P5 CHECK THE HEATED SEAT MODULE LOW INDICATOR ON THE EATC MODULE
Connect a 5A fused jumper lead between driver heated seat module C359-9, circuit 2070 (GY/LB), harness side and C359-12, circuit 566 (DG), harness side. Does only the left driver heated seat indicator LEDs illuminate on the EATC module?	Yes INSTALL a new driver heated seat module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new EATC module. REFER to Section 412-01. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver safety belt buckle pretensioner C323. CONNECT driver safety belt buckle pretensioner C323. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from driver seat side air bag C367. CONNECT driver seat side air bag C367. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

Pinpoint Test Q: The Heated Seat Does Not Operate Correctly — Seat Does Heat But The Heated Seat Indicator Does Not Illuminate When Pressed, Passenger

Refer to Wiring Diagrams Cell 119, Climate Controlled Seats for schematic and connector information.

Normal Operation

Possible Causes

An inoperative heated seat indicator can be caused by:

faulty wiring, terminals or connectors.
a faulty heated seat module.
a faulty EATC module.

PINPOINT TEST Q: THE HEATED SEAT DOES NOT OPERATE CORRECTLY — SEAT DOES HEAT BUT THE HEATED SEAT INDICATOR DOES NOT ILLUMINATE WHEN PRESSED, PASSENGER

Test Step	Result / Action to Take
Q1 CHECK FOR EATC MODULE DTCs
WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards. NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to Section 501-20B. NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer. Enter the following diagnostic mode on the diagnostic tool: Retrieve and Document Continuous DTCs From the EATC Module. Enter the following diagnostic mode on the diagnostic tool: Clear the EATC Module Continuous DTCs. Enter the following diagnostic mode on the diagnostic tool: EATC Module On-Demand Self-Test. Was DTC B2964 retrieved?	Yes Go To Pinpoint Test O. No GO to Q2.
Q2 CHECK CIRCUITS 580 (BN) AND 579 (BK/OG) FOR A SHORT TO GROUND
Key in OFF position. Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect: Passenger Safety Belt Buckle Pretensioner C303. Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303. Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only). WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected. Connect the battery ground cable. Disconnect: EATC Module C228b. Disconnect: Passenger Heated Seat Module C329. Measure the resistance between EATC module C228b-16, circuit 580 (BN), harness side and ground; and between EATC module C228b-17, circuit 579 (BK/OG), harness side and ground. Are the resistances greater than 10,000 ohms?	Yes GO to Q3. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
Q3 CHECK CIRCUITS 580 (BN) AND 579 (BK/OG) FOR AN OPEN
Key in ON position. Measure the resistance between EATC module C228b-16, circuit 580 (BN), harness side and passenger heated seat module C329-9, circuit 580 (BN), harness side; and between EATC module C228b-16, circuit 579 (BK/OG), harness side and passenger heated seat module C329-10, circuit 579 (BK/OG), harness side. Are the resistances less than 5 ohms?	Yes GO to Q4. No REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
Q4 CHECK THE HEATED SEAT MODULE HI INDICATOR ON THE EATC MODULE
Connect: EATC Module C228b. Key in ON position. Connect a 5A fused jumper lead between passenger heated seat module C329-10, circuit 579 (BK/OG), harness side and C329-12, circuit 1153 (RD/BK), harness side. Do both passenger heated seat indicator LEDs illuminate on the EATC module?	Yes GO to Q5. No INSTALL a new EATC module. REFER to Section 412-01. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.
Q5 CHECK THE HEATED SEAT MODULE LOW INDICATOR ON THE EATC MODULE
Connect a 5A fused jumper lead between passenger heated seat module C329-9, circuit 580 (BN), harness side and C329-12, circuit 1153 (RD/BK), harness side. Does only the left passenger heated seat indicator LEDs illuminate on the EATC module?	Yes INSTALL a new passenger heated seat module. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B. No INSTALL a new EATC module. REFER to Section 412-01. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303. For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337. REPOWER the supplemental restraint system (SRS). REFER to Section 501-20B.

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Parts & tools for this job For 2007 Ford Freestar

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