Circuit/System Verification
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
- Engine ON.
- Verify that no DTCs are set for the heated seat system.
- If DTCs are set for the heated seat system
- Go to next step: If no DTCs are set
- Verify the scan tool Body Control Module Driver Seat Heating/Venting/Cooling Mode parameter changes state when pressing the driver heated seat switch.
- If the parameter does not change
Replace the S48A Multifunction Switch - Instrument Panel.
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the scan tool Body Control Module Passenger Seat Heating/Venting/Cooling Mode parameter changes state when pressing the passenger heated seat switch.
- If the parameter does not change
Replace the S48A Multifunction Switch - Instrument Panel.
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the driver and passenger heated seats operate.
- If the driver and front 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 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
- Go to next step: If both heated seats operate
- If the driver and front passenger heated seats are inoperative
- All OK.