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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Mirror System) >> Diagnostic Information and Procedures >> Power Mirror Tilt Inoperative in Reverse >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine running, shift the vehicle in REVERSE.
  2. Verify that the appropriate A9 Outside Rearview Mirror moves DOWN.
    • If the A9 Outside Rearview Mirror does not move DOWN 

      Replace the K40 Seat Memory Control Module

    • Go to next step: If the A9 Outside Rearview Mirror does move DOWN 
  3. All OK.