DTC B2345
Diagnostic Instructions
DTC Descriptors
| DTC B2345 13: Seat Heater Disable Circuit Low
Voltage High/Temperature |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Driver Heated Seat Element Control Terminal 3 X2
|
B242A 02
|
B2425 0D
|
B242A 01
|
B2425 0E
|
Driver Heated Seat Element Control Terminal 1 X2
|
B242A 02
|
B2425 0D
|
B242A 01
|
B2425 0E
|
Driver Heated Seat Cushion Temperature Sensor Signal
|
B1925 02
|
B1925 05
|
B1925 05
|
B2345 13
|
Driver Heated Seat Cushion Temperature Sensor Low Reference
|
-
|
B1925 05
|
-
|
B2345 13
|
Passenger Heated Seat Element Control Terminal 5 X2
|
B242A 02
|
B2430 0D
|
B242A 01
|
B2430 0E
|
Passenger Heated Seat Element Control Terminal 2 X2
|
B242A 02
|
B2430 0D
|
B242A 01
|
B2430 0E
|
Passenger Heated Seat Cushion Temperature Sensor Signal
|
B2170 02
|
B2170 05
|
B2170 05
|
B2345 13
|
Passenger Heated Seat Cushion Temperature Sensor Low Reference
|
-
|
B2170 05
|
-
|
B2345 13
|
|
| |
Circuit/System Description
The seat heating control module controls seat heating operation
for both the driver and front passenger seats. The heating elements
are controlled through individual high side and low side control
circuits. The low side control circuits for both seats are
connected to a common reference point internal to the module. This
reference point is biased to approximately 2.5 V. Before the seat
heating control module will allow heated seat operation, it checks
to see if this biased voltage is shorted to ground or voltage. Once
the module verifies that it is not closing to a shorted heating
element, it allows for heated seat operation. The module then
continues to monitor the heating elements for a shorted
circuit.
Conditions for Running the DTC
The seat heating control module must be powered.
Conditions for Setting the DTC
B2345 13
Any temperature sensor input that remains below 1.5 V for more than
1 second.
Action Taken When the DTC Sets
The heated seat function for both seats will be disabled.
Conditions for Clearing the DTC
| • |
The current DTC will clear and
set the code to history 3 seconds after the reference voltage
returns to the normal operating range and the ignition is cycled
OFF then back to ACC or RUN. |
| • |
The history DTC will clear
after 40 consecutive fault-free ignition cycles have
occurred. |
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Heated Seats Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
X2, X3 harness connectors at the K29 seat heating control
module. |
| 2. |
Test for greater than 3.0
kΩ between the signal and the low reference circuits listed
below: |
| |
• |
E14B driver seat cushion
terminal 3 X3 and terminal 13 X2 |
| |
• |
E14D passenger seat cushion
terminal 4 X3 and terminal 14 X2 |
| ⇒ |
If less than the specified value, test for a short
between the signal and low reference circuits. If the circuits test
normal, replace the appropriate E14 seat cushion heating
element. |
| 3. |
If all circuits test normal,
replace the K29 seat heating control module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the repair.
|
