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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Power Seats) >> Diagnostic Information and Procedures >> Lumbar/Bolster/Massage Malfunction (Lumbar/Bolster/Massage Malfunction (4-Way Without AHE, AHH, AF6, or AKE)) >> Circuit/System Verification

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.
  1. Ignition/Vehicle in Service Mode.
  2. Verify that no DTCs are set.
    • Go to next step: If no DTCs are set 
  3. Operate the seat lumbar UP / DOWN / FORWARD / REARWARD. Verify each function operates.
    • If any of the lumbar functions do not operate 

      Refer to: Circuit/System Testing

    • Go to next step: If all of the lumbar functions operate 
  4. A fault is currently not present and may be an intermittent condition.
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