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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 125 (Image Display Camera System) >> Diagnostic Information and Procedures >> Rear Vision Camera System Malfunction (with UVB) >> Circuit/System Verification

Circuit/System Verification

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.
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. Verify P17 Info Display Module displays infotainment system information properly.
    • Go to next step: If infotainment system information displays properly 
  2. 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 
  3. Engine running, parking brake applied, transmission in REVERSE.
    NOTE: An open in the backup lamp control circuit, defective backup lamps, or incorrect/aftermarket backup lamps can cause erratic circuit behavior such as unwanted voltage on circuit when vehicle is no longer in REVERSE. The rear vision image display remaining active after the vehicle is shifted out of REVERSE can also be an indication of backup lamp control circuit issues.
  4. Verify the backup lamps are illuminated.
    • Go to next step: If the backup lamps are illuminated 
  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.

  6. Verify a clear rear vision image is displayed on the P17 Info Display Module.
    • Go to next step: If a clear image is displayed 
  7. All OK.
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