18 · Body & interior

Seats

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

BodySeats

Seats

Section 501-10 · Diagnosis and testing · revised 06/20/2006

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

Restraint System Diagnostic Tool Warning

WARNING: This 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.

Principles of Operation

Power Seats

The 6-way power seat feature moves the seat in 6 possible directions: the base of the seat can be moved forward or rearward and the front and back of the seat cushion can be moved up and down independently. The power seat feature operates independent of the position of the ignition.

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

Heated Seats

The driver and passenger heated seats share a common battery feed to the heated seat relay junction box. The ignition circuit powers the logic board and illumination of the heated seat switches located internal to the electronic manual temperature control assembly (EMTC). The battery feed is used to provide voltage to the heater mats.

There are 2 power supplies to the heated seat relay. One power supply energizes the relay and heated switch LED when the key is in the RUN position and the heated seat switch is activated. This closes the relay and power is provided to the heated seat elements through the other power circuit. The heated seat module will remain ON until the heated seat switch button is depressed to cycle the heated seat module OFF or a 10-minute time-out period occurs. If ignition power is switched OFF, the heated seat module will enter an OFF state.

The driver seat cushion and backrest heater elements are wired in series as are the passenger seat cushion and backrest heater elements. The heated seat system is designed to maintain the temperature by the opening (no voltage to the heated seat mats) and closing (voltage supplied to the heated seat mats) of the bi-metallic thermostat.

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 Seat at limit(s) of travel Seat tracks obstructed or damaged Power lumbar assembly damaged	Heated seat fuse bussed electrical center (BEC) fuse 66 (25A) Driver power seat and lumbar (BEC) fuse 14 (30A) Passenger power seat (BEC) fuse 15 (30A) Loose, corroded or damaged connectors Seat control switch Heated seat switch (internal to EMTC) Heated seat relays Lumbar seat control switch Heat seat cushion element Heat seat backrest element

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 not visually evident, verify the symptom. GO to Symptom Chart.

Symptom Chart

Refer to the Wiring Diagram manual for the connector numbers cited in the pinpoint tests.

SYMPTOM CHART
Condition	Possible Sources	Action
The power seat is inoperative — Driver	Fuse Circuitry Seat control switch	Go To Pinpoint Test A.
The power seat is inoperative — Passenger	Fuse Circuitry Seat control switch	Go To Pinpoint Test B.
The power seat moves but is noisy	Seat track alignment 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	Circuitry Seat control switch Seat track	Go To Pinpoint Test F.
The power seat does not move horizontally/vertically — Passenger	Circuitry Seat control switch Seat track	Go To Pinpoint Test G.
The power lumbar is inoperative	Fuse Circuitry Lumbar control switch Lumbar assembly	Go To Pinpoint Test H.
The heated seat is inoperative	Fuse Circuitry	Go To Pinpoint Test I.
The heated seat is inoperative — seat does not heat but the heated seat indicator illuminates when pressed—driver	Circuitry Heated seat cushion Heated seat backrest Heated seat relay	Go To Pinpoint Test J.
the heated seat is inoperative — seat does not heat but the heated seat indicator illuminates when pressed—Passenger	Circuitry Heated seat cushion Heated seat backrest Heated seat relay	Go To Pinpoint Test K.

Pinpoint Tests

Refer to Inspection and Verification 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, Seating for schematic and connector information.

Normal Operation

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

Possible Causes

An inoperative power seat can be caused by:

a fuse.
wiring, terminals or connectors.
a faulty power seat switch.

PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE — DRIVER

Test Step	Result / Action to Take
A1 CHECK VOLTAGE TO SEAT CONTROL SWITCH CIRCUIT 566 (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: The air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect driver seat side air bag C367. Connect restraint system diagnostic tool 418-133 to driver seat side air bag C367. Disconnect: Driver Seat Control Switch C360. Connect the battery ground cable. Measure the voltage between driver seat control switch C360-4, circuit 566 (DG), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to A2. No VERIFY bussed electrical center (BEC) fuse 14 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
A2 CHECK SEAT CONTROL SWITCH CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between driver seat control switch C360-2, circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes INSTALL a new seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.

Pinpoint Test B: The Power Seat Is Inoperative — Passenger

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

Normal Operation

The seat control switch is powered by battery voltage on circuit 1462 (RD/WH) and is supplied ground on circuit 1205 (BK).

Possible Causes

An inoperative power seat can be caused by:

a fuse.
wiring, terminals or connectors.
a faulty power seat switch.

PINPOINT TEST B: THE POWER SEAT IS INOPERATIVE — PASSENGER

Test Step	Result / Action to Take
B1 CHECK THE VOLTAGE TO SEAT CONTROL SWITCH CIRCUIT 1462 (RD/WH)
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 air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect passenger seat side air bag C337. Connect restraint system diagnostic tool 418-133 to passenger seat side air bag C337. Disconnect: Passenger Seat Control Switch C3190. Connect the battery ground cable. Measure the voltage between passenger seat control switch C3190-4, circuit 1462 (RD/WH), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to B2. No VERIFY bussed electrical center (BEC) fuse 15 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
B2 CHECK SEAT CONTROL SWITCH CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between passenger seat control switch C3190-2, circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes INSTALL a new seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the 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:

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

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: The air bag warning lamp illuminates when the restraints control module (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. 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. No IDENTIFY the cause and REPAIR as necessary. TEST the system for normal operation.

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:

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.

No
IDENTIFY the cause and REPAIR as necessary. TEST the system for normal operation.

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 component.

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: The air bag warning lamp illuminates when the restraints control module (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. Inspect the seat fastening hardware. Is the fastening hardware loose?	Yes TIGHTEN all fastening hardware to specification. TEST the system for normal operation. No IDENTIFY the cause and REPAIR as necessary. TEST the system for normal operation.

Test Step

Result / Action to Take

D1 CHECK THE FASTENING HARDWARE

NOTE:

Inspect the seat fastening hardware.
Is the fastening hardware loose?

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

No
IDENTIFY the cause and REPAIR as necessary. TEST the system for normal operation.

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

Normal Operation

The power seat should travel fully horizontal (forward/rearward) and vertical (front up/down and rear up/down).

Possible Causes

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

an obstruction.
a faulty seat track component.

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

Test Step	Result / Action to Take
E1 CHECK FOR AN 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: The air bag warning lamp illuminates when the restraints control module (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. Remove the affected seat. Refer to Seat — Front in this section. Are there any obstructions in the track?	Yes REMOVE the obstruction(s) and LUBRICATE the track(s). TEST the system for normal operation. REPOWER the SRS. REFER to Section 501-20B. No IDENTIFY the cause and REPAIR as necessary. TEST the system for normal operation. REPOWER the SRS. REFER to Section 501-20B.

Test Step

Result / Action to Take

E1 CHECK FOR AN OBSTRUCTION IN THE SEAT TRACK

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.
Remove the affected seat. Refer to Seat — Front in this section.
Are there any obstructions in the track?

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

REPOWER the SRS. REFER to Section 501-20B.

No
IDENTIFY the cause and REPAIR as necessary. TEST the system for normal operation.

REPOWER the SRS. REFER to Section 501-20B.

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

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

Normal Operation

The 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 power seat switch reverses the polarity to the 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 power seat that does not move horizontally and/or vertically can be caused by:

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

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: The air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect driver seat side air bag C367. Connect restraint system diagnostic tool 418-133 to driver seat side air bag C367. Connect the battery ground cable. Push the driver seat control switch to the front and rear. Does the power seat move to the front and rear?	Yes GO to F2. No GO to F9.
F2 DETERMINE POWER SEAT TILTING FAILURE
Verify the power seat tilting feature. Can the power seat be tilted forward and rearward?	Yes If only the forward tilting operates, GO to F3 . If only the rearward tilting operates, GO to F6 . No INSTALL a new seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
F3 CHECK VOLTAGE TO THE REAR HEIGHT MOTOR
Disconnect: Driver Power Seat Motor Assembly C353. Measure the voltage between driver power seat motor assembly C353-8, circuit 983 (RD/LG) and C353-2, circuit 982 (YE/LG), harness side, while pushing the seat control switch rear up and rear down. Is the voltage greater than 10 volts when the seat control switch is in the rear up position, greater than negative (-) 10 volts in the rear down position and 0 volts in the NEUTRAL position?	Yes INSTALL a new driver seat track assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No GO to F4.
F4 CHECK CIRCUIT 983 (RD/LG) FOR AN OPEN
Disconnect: Driver Seat Control Switch C360. Measure the resistance between driver seat control switch C360-5, circuit 983 (RD/LG), harness side and driver power seat motor assembly C353-8, circuit 983 (RD/LG), harness side. Is the resistance less than 5 ohms?	Yes GO to F5. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
F5 CHECK CIRCUIT 982 (YE/LG) FOR AN OPEN
Measure the resistance between driver seat control switch C360-7, circuit 982 (YE/LG), harness side and driver power seat motor assembly C353-2, circuit 982 (YE/LG), harness side. Is the resistance less than 5 ohms?	Yes INSTALL a new driver seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
F6 CHECK VOLTAGE TO THE FRONT HEIGHT MOTOR
Disconnect: Driver Power Seat Motor Assembly C353. Measure the voltage between driver power seat motor assembly C353-1, circuit 979 (RD/LB) and C353-7, circuit 990 (YE/LB), harness side while pushing the driver seat control switch front up and front down. Is the voltage greater than 10 volts when the seat control switch front height adjustment is in the front up position, greater than negative (-) 10 volts in the front down position and 0 volts in the NEUTRAL position?	Yes INSTALL a new driver seat track assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No GO to F7.
F7 CHECK CIRCUIT 979 (RD/LB) FOR AN OPEN
Disconnect: Driver Seat Control Switch C360. Measure the resistance between driver seat control switch C360-1, circuit 979 (RD/LB), harness side and driver power seat motor assembly C353-1, circuit 979 (RD/LB), harness side. Is the resistance less than 5 ohms?	Yes GO to F8. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
F8 CHECK CIRCUIT 990 (YE/LB) FOR AN OPEN
Measure the resistance between driver seat control switch C360-8, circuit 990 (YE/LB), harness side and driver power seat motor assembly C353-7, circuit 990 (YE/LB), harness side. Is the resistance less than 5 ohms?	Yes INSTALL a new driver seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
F9 CHECK VOLTAGE TO THE HORIZONTAL MOTOR
Disconnect: Driver Power Seat Motor Assembly C353. Measure the voltage between driver power seat motor assembly C353-3, circuit 981 (RD/WH) and C353-5, circuit 980 (YE/WH), harness side while pushing the seat control switch forward and rearward. Is the voltage greater than 10 volts when the seat control switch is in the rearward position, greater than negative (-) 10 volts in the forward position and 0 volts in the NEUTRAL position?	Yes INSTALL a new driver seat track assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No GO to F10.
F10 CHECK CIRCUIT 981 (RD/WH) FOR AN OPEN
Disconnect: Driver Seat Control Switch C360. Measure the resistance between driver seat control switch C360-6, circuit 981 (RD/WH), harness side, and driver power seat motor assembly C353-3, circuit 981 (RD/WH), harness side. Is the resistance less than 5 ohms?	Yes GO to F11. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
F11 CHECK CIRCUIT 980 (YE/WH) FOR AN OPEN
Measure the resistance between driver seat control switch C360-3, circuit 980 (YE/WH), harness side and driver power seat motor assembly C353-5, circuit 980 (YE/WH), harness side. Is the resistance less than 5 ohms?	Yes INSTALL a new driver seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.

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

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

Normal Operation

The seat control switch is powered by battery voltage on circuit 1462 (RD/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 power seat switch reverses the polarity to the 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 power seat that does not move horizontally and/or vertically can be caused by:

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

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: The air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect passenger seat side air bag C337. Connect restraint system diagnostic tool 418-133 to passenger seat side air bag C337. Connect the battery ground cable. Push the passenger seat control switch to the front and rear. Does the power seat move to the front and rear?	Yes GO to G2. No GO to G9.
G2 DETERMINE POWER SEAT TILTING FAILURE
Verify the power seat tilting feature. Can the power seat be tilted forward and rearward?	Yes If only the rearward tilting operates, GO to G3 . If only the forward tilting operates, GO to G6 . No INSTALL a new seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
G3 CHECK VOLTAGE TO THE FRONT HEIGHT MOTOR
Disconnect: Passenger Power Seat Motor Assembly C3015. Measure the voltage between passenger power seat motor assembly C3015-8, circuit 984 (YE/LB) and C3015-2, circuit 985 (RD/LB), harness side, while pushing the seat control switch rear up and rear down. Is the voltage greater than 10 volts when the seat control switch front height adjustment is in the front up position, greater than negative (-) 10 volts in the front down position and 0 volts in the NEUTRAL position?	Yes INSTALL a new passenger seat track assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No GO to G4.
G4 CHECK CIRCUIT 984 (YE/LB) FOR AN OPEN
Disconnect: Passenger Seat Control Switch C3190. Measure the resistance between passenger seat control switch C3190-7, circuit 984 (YE/LB), harness side and passenger power seat motor assembly C3015-8, circuit 984 (YE/LB), harness side. Is the resistance less than 5 ohms?	Yes GO to G5. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
G5 CHECK CIRCUIT 985 (RD/LB) FOR AN OPEN
Measure the resistance between passenger seat control switch C3190-5, circuit 985 (RD/LB), harness side and passenger power seat motor assembly C3015-2, circuit 985 (RD/LB), harness side. Is the resistance less than 5 ohms?	Yes INSTALL a new passenger seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
G6 CHECK VOLTAGE TO THE REAR HEIGHT MOTOR
Disconnect: Passenger Power Seat Motor Assembly C3015. Measure the voltage between passenger power seat motor assembly C3015-1, circuit 988 (YE/LG) and C3015-7, circuit 989 (RD/LG), harness side while pushing the passenger seat control switch front up and front down. Is the voltage greater than 10 volts when the seat control switch is in the rear up position, greater than negative (-) 10 volts in the rear down position and 0 volts in the NEUTRAL position?	Yes INSTALL a new passenger seat track assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No GO to G7.
G7 CHECK CIRCUIT 988 (YE/LG) FOR AN OPEN
Disconnect: Passenger Seat Control Switch C3190. Measure the resistance between passenger seat control switch C3190-8, circuit 988 (YE/LG), harness side and passenger power seat motor assembly C3015-1, circuit 988 (YE/LG), harness side. Is the resistance less than 5 ohms?	Yes GO to G8. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
G8 CHECK CIRCUIT 989 (RD/LG) FOR AN OPEN
Measure the resistance between passenger seat control switch C3190-1, circuit 989 (RD/LG), harness side and passenger power seat motor assembly C3015-7, circuit 989 (RD/LG), harness side. Is the resistance less than 5 ohms?	Yes INSTALL a new passenger seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT driver seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
G9 CHECK VOLTAGE TO THE HORIZONTAL MOTOR
Disconnect: Passenger Power Seat Motor Assembly C3015. Measure the voltage between passenger power seat motor assembly C3015-3, circuit 987 (RD/WH) and C3015-5, circuit 986 (YE/WH), harness side while pushing the seat control switch forward and rearward. Is the voltage greater than 10 volts when the seat control switch is in the rearward position, greater than negative (-) 10 volts in the forward position and 0 volts in the NEUTRAL position?	Yes INSTALL a new passenger seat track assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No GO to G10.
G10 CHECK CIRCUIT 987 (RD/WH) FOR AN OPEN
Disconnect: Passenger Seat Control Switch C3190. Measure the resistance between passenger seat control switch C3190-6, circuit 987 (RD/WH), harness side, and driver power seat motor assembly C3015-3, circuit 987 (RD/WH), harness side. Is the resistance less than 5 ohms?	Yes GO to G11. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
G11 CHECK CIRCUIT 986 (YE/WH) FOR AN OPEN
Measure the resistance between passenger seat control switch C3190-3, circuit 986 (YE/WH), harness side and driver power seat motor assembly C3015-5, circuit 986 (YE/WH), harness side. Is the resistance less than 5 ohms?	Yes INSTALL a new passenger seat control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.

Pinpoint Test H: The Power Lumbar Is Inoperative

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

Normal Operation

The lumbar control switch is powered by battery voltage on circuit 566 (DG) and is supplied ground on circuit 1205 (BK). When the knob of the lumbar control switch is pressed, voltage and ground are supplied to the power lumbar motor. When pressing the lumbar knob in the opposite direction, the lumbar control switch reverses the polarity to the power lumbar motor, which moves the lumbar mechanism in the opposite direction.

Possible Causes

An inoperative power lumbar can be caused by:

wiring, terminals or connectors.
a faulty lumbar control switch.
a faulty power lumbar motor assembly.

PINPOINT TEST H: THE POWER LUMBAR IS INOPERATIVE

Test Step	Result / Action to Take
H1 CHECK CIRCUIT 566 (DG) FOR AN OPEN
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 air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect driver seat side air bag C367. Connect restraint system diagnostic tool 418-133 to driver seat side air bag C367. Connect the battery ground cable. Disconnect: Lumbar Control Switch C361. Measure the voltage between lumbar control switch C361-4, circuit 566 (DG), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to H2. No VERIFY bussed electrical center (BEC) fuse 14 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
H2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between lumbar control switch C361-2, circuit 1205 (BK), harness side and ground; and between lumbar control switch C361-8, circuit 1205 (BK), harness side and ground. Are the resistances less than 5 ohms?	Yes GO to H3. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
H3 CHECK THE LUMBAR MOTOR
Connect: Lumbar Control Switch C361. Disconnect: Power Lumbar Motor C366. Measure the voltage between power lumbar motor C366-1, circuit 1097 (BN), harness side and power lumbar motor C366-2, circuit 1094 (PK), harness side. Operate the power lumbar control switch in both directions. Is the voltage greater than 10 volts in both directions?	Yes INSTALL a new power lumbar assembly. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No GO to H4.
H4 CHECK CIRCUIT 1094 (PK) AND CIRCUIT 1097 (BN) FOR A SHORT TO GROUND
Disconnect: Lumbar Control Switch C361. Measure the resistance between lumbar control switch C361-3, circuit 1097 (BN), harness side and ground; and between lumbar control switch C361-7, circuit 1094 (PK), harness side and ground. Are the resistances greater than 10,000 ohms.	Yes GO to H5. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
H5 CHECK CIRCUIT 1094 (PK) AND CIRCUIT 1097 (BN) FOR AN OPEN
Measure the resistance between power lumbar control switch C361-3, circuit 1097 (BN), harness side and power lumbar motor C366-1, circuit 1097 (BN), harness side; and between lumbar control switch C361-7, circuit 1094 (PK), harness side and power lumbar motor C366-2, circuit 1094 (PK), harness side. Are the resistances less than 5 ohms?	Yes INSTALL a new lumbar control switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No REPAIR the circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.

Pinpoint Test I: The Heated Seat Is Inoperative

Normal Operation

The electronic manual temperature control (EMTC) module includes the heated seat control buttons and indicators. The heated seat system will function when the EMTC module is ON or OFF. There is a relay box located behind the headlamp switch area containing 2 micro relays for the driver and passenger heated seats. There are 2 power supplies to the heated seat relay. One power supply energizes the relay and heated switch LED when the key is in the run position and the heated seat switch is activated. This closes the relay and power is provided to the heated seat elements through the other power circuit. If the heated seat switch is ON when the ignition is turned OFF, the heated seat switch will be ON when the ignition is turned back ON.

Possible Causes

An inoperative heated seat can be caused by:

fuse(s).
wiring, terminals or connectors.
a faulty heated seat switch (EMTC).
a faulty heated seat relay.
a faulty heated seat element.

PINPOINT TEST I: THE HEATED SEAT IS INOPERATIVE

Test Step	Result / Action to Take
I1 CHECK HEATED SEAT SWITCH OPERATION
Key in ON position. Press both heated switches to ON. Do one or both heated switch indicators illuminate?	Yes If both indicators illuminate: For driver seat, Go To Pinpoint Test J. For passenger seat, Go To Pinpoint Test K. No GO to I2.
I2 CHECK THE HEATED SEAT POWER CIRCUITS
Key in OFF position. Disconnect: Heated Seat Relay Driver or Passenger. Key in ON position. Measure the voltage at heated seat relay pin 1, circuit 1048 (LB/WH), harness side and ground; and between pin 3, circuit 1048 (LB/WH), harness side and ground. Are the voltages greater than 10 volts?	Yes GO to I3. No VERIFY bussed electrical center (BEC) fuse 66 (25A) is OK. If OK, REPAIR circuit 1048 (LB/WH). TEST the system for normal operation.
I3 CHECK THE EMTC MODULE FOR DTCs
Key in OFF position. Connect: Heated Seat Relay Driver or Passenger. Key in ON position. Enter the following diagnostic mode on the diagnostic tool: Electronic Manual Temperature Control (EMTC) Module Self -Test / Retrieve DTCs. Were any DTCs retrieved?	Yes REFER to Section 412-00 to diagnose the EMTC fault. No INSTALL a new EMTC module. TEST the system for normal operation.

Pinpoint Test J: The Heated Seat Is Inoperative—Seat Does Not Heat But The Heated Seat Indicator Illuminates When Pressed—Driver

Normal Operation

There are 2 power supplies to the heated seat relay. One power supply energizes the relay and heated switch LED when the key is in the run position and the heated seat switch is activated. This closes the relay and power is provided to the heated seat elements through the other power circuit. If the heated seat switch is ON when the ignition is turned OFF, the heated seat switch will be ON when the ignition is turned back ON.

Possible Causes

An inoperative heated seat can be caused by:

wiring, terminals or connectors.
a faulty heated seat switch (EATC module).
a faulty heated seat relay.
a faulty heated seat mat.

PINPOINT TEST J: THE HEATED SEAT IS INOPERATIVE—SEAT DOES NOT HEAT BUT THE HEATED SEAT INDICATOR ILLUMINATES WHEN PRESSED — DRIVER

Test Step	Result / Action to Take
J1 CHECK CIRCUIT 1064 (YE/LB) FOR AN OPEN
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 air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect driver seat side air bag C367. Connect restraint system diagnostic tool 418-133 to driver seat side air bag C367. Connect the battery ground cable. Disconnect: Driver Seat Connector C311. Key in ON position. Measure the voltage between driver seat C311-1, circuit 1064 (YE/LB), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to J3. No GO to J2.
J2 CHECK THE HEATED SEAT RELAY
Key in OFF position. Swap the driver heated seat relay with the passenger heated seat relay. Does the seat heat when the heated seat switch is depressed?	Yes INSTALL a new heated seat relay. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No GO to J3.
J3 CHECK CIRCUIT 1064 (YE/LB) FOR AN OPEN
Key in OFF position. Measure the resistance between driver seat C311-1 circuit 1064 (YE/LB), harness side and driver heated seat relay pin 5, circuit 1064 (YE/LB), harness side. Is the resistance less than 5 ohms?	Yes GO to J4. No REPAIR circuit 1064 (YE/LB). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
J4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Measure the resistance between driver seat C311-9 circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes GO to J5. No REPAIR circuit 1205 (BK). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
J5 CHECK HEATED SEAT CUSHION ELEMENT FOR AN OPEN
Disconnect: Heated Seat Cushion Element C3300. Measure the resistance between driver heated seat cushion element C3300-1 and C3300-2 component side. Is the resistance between 0.8 and 1.3 ohms?	Yes GO to J6. No INSTALL a new heated seat cushion element. REFER to Seat Cushion Cover — Front. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
J6 CHECK HEATED SEAT BACKREST ELEMENT FOR AN OPEN
Disconnect: Heated Seat Backrest Element C3310. Measure the resistance between driver heated seat cushion element C3310-1 and C3310-2 component side. Is the resistance between 0.8 and 1.3 ohms?	Yes REPAIR seat harness. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B. No INSTALL a new heated seat cushion element. REFER to Seat Cushion Cover — Front. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.

Pinpoint Test K: The Heated Seat Is Inoperative—Seat Does Not Heat But The Heated Seat Indicator Illuminates When Pressed—Passenger

Normal Operation

Possible Causes

An inoperative heated seat can be caused by:

wiring, terminals or connectors.
a faulty heated seat switch (EMTC module).
a faulty heated seat relay.
a faulty heated seat element.

PINPOINT TEST K: THE HEATED SEAT IS INOPERATIVE—SEAT DOES NOT HEAT BUT THE HEATED SEAT INDICATOR ILLUMINATES WHEN PRESSED—PASSENGER

Test Step	Result / Action to Take
K1 CHECK CIRCUIT 2124 (YE/LB) FOR AN OPEN
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 air bag warning lamp illuminates when the restraints control module (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. 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. For vehicles equipped with seat side air bags, carry out the following: Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Section 501-20B. Disconnect passenger seat side air bag C337. Connect restraint system diagnostic tool 418-133 to passenger seat side air bag C337. Connect the battery ground cable. Disconnect: Passenger Seat Connector C300. Key in ON position. Measure the voltage between passenger seat C300-1, circuit 2124 (YE/LB), harness side and ground. Is the voltage greater than 10 volts?	Yes GO to K3. No GO to K2.
K2 CHECK THE HEATED SEAT RELAY
Key in OFF position. Swap the passenger heated seat relay with the driver heated seat relay. Does the seat heat when the heated seat switch is depressed ?	Yes INSTALL a new heated seat relay. Test the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No GO to K3.
K3 CHECK CIRCUIT 2124 (YE/LB) FOR AN OPEN
Key in OFF position. Measure the resistance between passenger seat C300-1 circuit 2124 (YE/LB), harness side and passenger heated seat relay pin 5, circuit 2124 (YE/LB), harness side. Is the resistance less than 5 ohms?	Yes GO to K4. No REPAIR circuit 2124 (YE/LB). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C367. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Section 501-20B.
K4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
Key in OFF position. Measure the resistance between passenger seat C300-9 circuit 1205 (BK), harness side and ground. Is the resistance less than 5 ohms?	Yes GO to K5. No REPAIR circuit 1205 (BK). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
K5 CHECK HEATED SEAT CUSHION ELEMENT FOR AN OPEN
Disconnect: Heated Seat Cushion C334. Measure the resistance between passenger heated seat cushion element C334-1 and C334-2 component side. Is the resistance between 0.8 and 1.3 ohms?	Yes GO to K6. No INSTALL a new heated seat cushion. REFER to Seat Cushion Cover — Front. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.
K6 CHECK HEATED SEAT BACKREST ELEMENT FOR AN OPEN
Disconnect: Heated Seat Backrest C335. Measure the resistance between driver heated seat backrest element C335-1 and C335-2 component side. Is the resistance between 0.8 and 1.3 ohms?	Yes REPAIR the seat harness. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B. No INSTALL a new heated seat Backrest. REFER to Seat Backrest — Front. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C337. CONNECT passenger seat side air bag module C337. REPOWER the SRS. REFER to Section 501-20B.

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Parts & tools for this job For 2007 Ford Mustang

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