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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 329 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> DTC B127B: Rearview Camera Input Signal Circuit >> Circuit/System Verification
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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.
NOTE:

If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the high resistance condition due to terminal fretting corrosion.

  1. Ignition ON.
  2. Verify the rearview camera has no debris on the lens and that the bezel and bezel seal are not damaged.
    • If debris is found on the lens 

      Clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary.

    • If no debris on the lens 
  3. Engine running, transmission in R.
  4. Verify a clear rear vision image is displayed on the P17 Info Display Module.
    • If a clear image is not displayed 

      Refer to the appropriate Circuit/System Testing.

    • If a clear image is displayed 
  5. All OK.
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