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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 335 (Mirror System) >> Diagnostic Information and Procedures >> Power Mirror Tilt Inoperative in Reverse >> 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.
  1. Ignition ON.
  2. Verify the park assist option is activated in the driver information center (DIC).
  3. Select the driver outside mirror on S52 Outside Rearview Mirror Switch.
  4. Verify mirror functions properly when operating the S52 Outside Rearview Mirror Switch in UP/DOWN and LEFT/RIGHT positions.
    • If the mirror functions properly 
  5. Select the passenger outside mirror on S52 Outside Rearview Mirror Switch.
  6. Verify mirror functions properly when operating the S52 Outside Rearview Mirror Switch in UP/DOWN and LEFT/RIGHT positions..
    • If the mirror functions properly 
  7. Operate the memory 1 and 2 recall switches on S47D Seat Memory Switch - Driver.
  8. Verify the outside rearview mirrors adjust to the stored memory positions.
    • If the mirrors adjust to the stored positions 
  9. Park brake on, vehicle running, shift the vehicle in REVERSE.
  10. Verify that the outside rearview mirrors tilt.
    • If the driver outside mirror does not tilt 
    1. Ignition OFF.
    2. Replace the S52 Outside Rearview Mirror Switch.
    3. Park brake on, vehicle running, shift the vehicle in REVERSE.
    4. Verify the driver mirror tilts.
      • If the mirror does not tilt, replace the K40 Memory Seat Module.
      • If the mirror tilts
    5. All OK.
    • If the passenger outside mirror does not tilt 
    1. Ignition OFF.
    2. Replace the S79P Passenger Window Switch.
    3. Park brake on, vehicle running, shift the vehicle in REVERSE.
    4. Verify the driver mirror tilts.
      • If the mirror does not tilt, replace the K40 Memory Seat Control Module.
      • If the mirror tilts
    5. All OK.
    • If the mirrors tilt 
  11. All OK.
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