Circuit/System Verification
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify the scan tool Body Control Module Driver Seat Heating/Venting/Cooling Mode parameter changes between Off and Seat Back and Cushion Heating when pressing the driver heated seat switch.
- If the parameter does not change
Replace the S31D Seat Heating and Cooling Switch - Driver.
- If the parameter changes
- If the parameter does not change
- Verify the scan tool Passenger Seat Heating/Venting/Cooling Mode parameter changes between Off and Seat Back and Cushion Heating when pressing the passenger heated seat switch.
- If the parameter does not change
Replace the S31P Seat Heating and Cooling Switch - Passenger.
- If the parameter changes
- If the parameter does not change
- Verify the driver and passenger heated seats operate.
- If the driver and passenger heated seats are inoperative
Refer to Circuit/System Testing - Both Heated Seats are Inoperative
- If the seat cushion and back heating elements are inoperative of one seat
Refer to Circuit/System Testing - One Heated Seat is Inoperative
- If just one of the heating elements is inoperative
Refer to Circuit/System Testing - One Heating Element is Inoperative.
- If the driver seat exhibits a degraded heated seat operation
Refer to Circuit/System Testing - Degraded Heated Seat Operation Driver Seat
- If the passenger seat exhibits a degraded heated seat operation
Refer to Circuit/System Testing - Degraded Heated Seat Operation Passenger Seat
- If both heated seats operate
- If the driver and passenger heated seats are inoperative
- All OK.
NOTE:
Review the Diagnostic Fault Information table and Diagnostic Aids in order to get a better understanding of the possible heated seat system faults before proceeding Circuit/System Verification and Circuit/System Testing.