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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 336 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B243A or B243B: Front Seat Heating Switch >> Circuit/System Verification

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.

DTC B243A

  1. Ignition ON.
  2. Verify DTC B243A is not set.
    • If the DTC is set 

      Replace the appropriate S31D Seat Heating and Cooling Switch - Driver.

    • If the DTC is not set 
  3. All OK.

DTC B243B

  1. Ignition ON.
  2. Verify DTC B243B is not set.
    • If the DTC is set 

      Replace the appropriate S31P Seat Heating and Cooling Switch - Passenger.

    • If the DTC is not set 
  3. All OK.
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