Circuit Description
The climate control seat module (CCSM) modes are controlled by a 100 Hertz pulse width modulation (PWM) signal that is generated by the door control module. When a door module receives a heated or cool seat request, it sends this PWM signal through the heated/cool seat mode signal circuit to the CCSM. The CCSM then activates the heated or cool seat system as requested.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2507 Seat Temperature and Mode Signal
Conditions for Running the DTC
The door control module must be powered and can not have B1327 - Battery Voltage Low or B1328 - Battery Voltage High set as an active DTC for this DTC to set.
Conditions for Setting the DTC
| • | This DTC will set, when the ignition is in the ON position, the CCS system is OFF, and the door control module detects that the voltage from the CCSM is less than 2.0 volts for 2 seconds. |
| • | This DTC will set, when the ignition is in the ON position, the CCS system is ON, and the door control module detects that the voltage from the CCSM is greater than 10 volts for 2 seconds. |
Action Taken When the DTC Sets
The CCSM will discontinue operation when this DTC is set.
Conditions for Clearing the DTC
The DTC automatically clears when the door module detects that the voltage from the CCSM is greater than 2 volts but less than 10 volts.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics Connector End View Reference: Power Seat Connector End Views or Power Door Systems Connector End Views in Doors | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool display DTC B2507? | -- | Go to Step 4 | Go to Step 3 |
3 |
Does the scan tool display DTC B2507? | -- | Go to Step 6 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
4 |
Does the voltage measure near the specified value? | 12 V | Go to Step 7 | Go to Step 5 |
5 | Test the heated/cool seat mode signal circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 8 |
6 | Test the heated/cool seat mode signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 7 |
7 | Inspect for poor connections at the harness connector of the door control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the climate control seat module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 10 |
9 | Replace the door control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 11 | -- |
10 | Replace the climate control seat module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 11 | -- |
11 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
