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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection And Pedestrian Protection System >> Diagnostic Information and Procedures >> DTC B127B: Video Signal From Rearview Camera Not Received By Human Machine Interface Control Module >> Circuit/System Verification

Circuit/System Verification

  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. Ignition ON, transmission in R.
  4. Verify the backup lamps are illuminated.

    5. If the backup lamps are not illuminated 

    Refer to BACKUP LAMPS MALFUNCTION (AUTOMATIC TRANSMISSION) or BACKUP LAMPS MALFUNCTION (MANUAL TRANSMISSION)

    If the backup lamps are illuminated 

  5. Engine running, transmission in R.
  6. Verify a clear rear vision image is displayed on the P17 Info Display Module.

    7. If a clear image is not displayed 

    Refer to Circuit/System Testing.

    If a clear image is displayed 

  7. All OK
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