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 heated seat system operates.
- If the heated seat system does not operate
  Refer to Front Heated Seat Malfunction (With Vented Seat KU9) Front Heated Seat Malfunction (Without Vented Seat KU9)
- If the heated seat system operates
Verify the scan tool Body Control Module Driver Seat Heating/Venting/Cooling Mode parameter changes between Off and Seat Venting/Cooling - High when pressing the driver vented seat switch.
- If the parameter does not change
  Replace the S31D Seat Heating and Cooling Switch - Driver.
- If the parameter changes
Verify the scan tool Body Control Module Passenger Seat Heating/Venting/Cooling Mode parameter changes between Off and Seat Venting/Cooling - High when pressing the passenger vented seat switch.
- If the parameter does not change
  Replace the S31P Seat Heating and Cooling Switch - Passenger.
- If the parameter changes
Verify the seat cushion and seat back blower motors turn ON and OFF.
- If either one or both the seat cushion and seat back blower motors are inoperative
  Refer to Circuit/System Testing.
- If the blower motors do not change speed or are always ON
  Refer to Circuit/System Testing.
- If the seat cushion and seat back blower motors operate
All OK.