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Home >> Cadillac >> 2017 >> ATS Base, 2D Coupe, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 264 (Object Detection System And Pedestrian Protection System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B391E: Night Vision Camera >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2016 Cadillac CT6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC B391E 66 is not set.
    • If the DTC is not set 
  3. Verify DTC B391E 00, B391E 03, B391E 04, B391E 07, B391E 08, B391E 0B, B391E 3A, or B391E 74 is not set.
    • If DTC is set 
    1. Replace the K172 Night Vision Control Module to B276 Night Vision Camera cable.
    2. Verify DTC DTC B391E 00, B391E 03, B391E 04, B391E 07, B391E 08, B391E 0B, B391E 3A, or B391E 74 is set after replacing the cable.
      • If the DTC does not set

        All OK.

      • If the DTC sets after cable replacement
    3. Replace the B276 Night Vision Camera
    4. Verify DTC DTC B391E 00, B391E 03, B391E 04, B391E 07, B391E 08, B391E 0B, B391E 3A, or B391E 74 is set after replacing the B276 Night Vision Camera.
      • If the DTC does not set

        All OK.

      • If the DTC is set
    5. Replace the K172 Night Vision Control Module.
    • If the DTC is not set 
  4. Verify DTC B391E 3B, B391E 59, or B391E 7F is not set.
    • If DTC is set 
    1. Replace the B276 Night Vision Camera
    2. Verify DTC B391E 3B, B391E 59, or B391E 7F is set after replacing the B276 Night Vision Camera.
      • If the DTC does not set

        All OK.

      • If the DTC is set
    3. Replace the K172 Night Vision Control Module.
    • If the DTC is not set 
  5. Verify DTC B391E 31, B391E 34, B391E 36, B391E 38, or B391E 39 is not set.
    • If DTC is set 

      Replace the B276 Night Vision Camera

    • If the DTC is not set 
  6. Verify DTC B391E 55, B391E 56, B391E 61, B391E 62, or DTC B391E 63 is not set.
    • If DTC is set 

      Replace the B276 Night Vision Camera

    • If the DTC is not set 
  7. Verify DTC B391E 54 is not set.
    8. NOTE:

    Allow the vehicle to cool if the ambient temperature is excessive before proceeding with this diagnostic procedure. The camera will not operate with internal temperatures higher than 176 °F (80 °C)

    • If DTC is set 
    1. Allow the camera to cool.
    2. Clear the DTC. Verify the DTC does not set.
      • If the DTC is set, replace the B276 Night Vision Camera
      • If the DTC does not set
    3. All OK.
    • If the DTC is not set 
  9. All OK.
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