Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT5. 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
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no DTCs are set
Verify the scan tool 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
Verify the scan tool 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
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
A fault is currently not present and may be an intermittent condition.