Diagnostic Instructions
Circuit/System Description
The left and right rear passenger heated seats are controlled by separate heated seat switches located in the auxiliary heater and air conditioning control module. The heated seats operate in the high and low modes for the seat cushion only. When a heated
seat switch is pressed, the auxiliary heater and air conditioning control module illuminates appropriate switch indicators and sends a serial data message to the rear heated seat module (RHSM) indicating the heated seat request. The RHSM then determines the
mode of operation and turns the heated seat system ON or OFF.
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 Verification
- Engine running, observe the scan tool Rear HVAC/RSA parameters listed below while pressing and releasing the appropriate heated seat switch. The reading should change between Inactive and Active and the appropriate switch indicators should illuminate.
• | Left Rear Heated Seat Switch |
• | Right Rear Heated Seat Switch |
⇒ | If not the specified values, replace the auxiliary heater and air conditioning control module. |
⇒ | If the scan tool parameters test normal, but, the switch indicators do not illuminate, replace the auxiliary heater
and air conditioning control module. |
- If all scan tool parameters test normal and there are no DTCs set, replace the RHSM.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for RHSM and auxiliary heater and air conditioning control module replacement, setup, and programming