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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 (Passenger 8-Way Seat Coupe) >> 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. Verify the seat directional motors listed below operate while operating the appropriate seat switches in both directions.
    • M51P Horizontal Motor - Passenger
    • M50P Front Vertical Motor - Passenger
    • M55P Rear Vertical Motor - Passenger
    • M56P Recline Motor - Passenger
    • If all seat motors do not operate 

      Refer to Circuit/System Testing - Seat Adjuster Switch Circuit Test.

    • if only the seat horizontal motor does not operate 
    1. Ignition ON.
    2. Verify the scan tool Passenger Seat Horizontal switch parameter changes between Inactive and Forward/Rearward when pressing the seat horizontal switch in both directions.
      • If the parameter does not change, Refer to Circuit/System Testing - Seat Horizontal Switch Signal Circuit Test.
      • If the parameter changes, refer to the Refer to Circuit/System Testing - Seat Horizontal Motor Control Circuit Test.
    • If 1 or more seat motors operate but not all 

      Refer to Circuit/System Testing - Seat Motor Control Circuit Test.

    • If all seat motors operate 
  2. All OK.
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