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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 272 (Power Seat System) >> Diagnostic Information and Procedures >> Power Seat Malfunction (With W2E) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that no DTCs are set.
    • If no DTCs are set 
  3. Verify the appropriate scan tool Driver or Passenger seat switch parameters listed below change between Inactive and Forward/Rearward or Up/Down when pressing the appropriate switch.
    • Seat Horizontal Switch
    • Seat Cushion Front Vertical Switch
    • Seat Cushion Rear Vertical Switch
    • Seat Back Switch
    • If the parameter does not change 

      Test or replace the S64 Seat Adjuster Switch.

    • If the parameter changes 
  4. Verify the seat directional motors listed below operate while operating the appropriate seat switches in both directions.
    • M50 Seat Front Vertical Motor
    • M55 Seat Rear Vertical Motor
    • M51 Seat Horizontal Motor
    • M56 Seat Recline Motor
    • If any seat motor does not operate 

      Refer to Circuit/System Testing.

    • If all seat motors operate 
  5. All OK.
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