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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Image Display Camera System >> Diagnostic Information And Procedures >> DTC B127B: Rearview Camera Input Signal Circuit (IO5/IO6 Without MAH/MBC) >> Circuit/System Verification

Circuit/System Verification

  1. Verify there is no debris on the B87 Rearview Camera lens and that the bezel and bezel seal are not damaged.
    • If debris is found on the lens 

      Clean the lens using water and a soft cloth. If the lens, bezel, or bezel seal are damaged, replace as necessary.

    • Go to next step: If there is no debris on the lens 
  2. Engine running, parking brake applied, transmission in REVERSE.
  3. Verify the backup lamps are illuminated.
    • Go to next step: If the backup lamps are illuminated 
  4. Ignition ON. Verify P17 Info Display Module displays the home screen and radio information properly.
    • Go to next step: If the P17 Info Display displays properly 
  5. Engine running, parking brake applied, transmission in REVERSE.
  6. NOTE:

    A poor quality image is an image that has flickering, blinking, excessively blue/yellow hue, and/or fog/haze such that it obstructs the driver's view out the rear of the vehicle.

  7. Verify a clear rear vision image is displayed on the P17 Info Display Module.
    • If a clear image is not displayed 

      Refer to Circuit/System Testing.

    • Go to next step: If a clear image is displayed 
  8. All OK.