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.
- Engine ON.
- Verify the scan tool Body Control Module Left Rear Seat Heating/Venting/Cooling Mode parameter changes between Off and Seat Back and Cushion Heating when pressing the left rear heated seat switch.
- If the parameter does not change
Replace the A34 HVAC Controls - Auxiliary.
- If the parameter changes
- If the parameter does not change
- Verify the scan tool Right Rear Seat Heating/Venting/Cooling Mode parameter changes between Off and Seat Back and Cushion Heating when pressing the right rear heated seat switch.
- If the parameter does not change
Replace the A34 HVAC Controls - Auxiliary.
- If the parameter changes
- If the parameter does not change
- Verify the left and right rear heated seats operate.
- If both rear heated seats are inoperative
Refer to Circuit/System Testing - Both Rear Heated Seats are Inoperative
- If just one of the rear heated seats is inoperative
Refer to Circuit/System Testing - One Rear Heated Seat is Inoperative
- If the left rear seat exhibits a degraded heated seat operation
Refer to Circuit/System Testing - Degraded Heated Seat Operation Left Rear Seat
- If the right rear seat exhibits a degraded heated seat operation
Refer to Circuit/System Testing - Degraded Heated Seat Operation Right Rear Seat
- If both heated seats operate
- If both rear 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.