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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Image Display Cameras) >> Diagnostic Information and Procedures >> DTC B1A5C >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    Before testing the coax cable, check the cable's exterior for being pinched, cut, damaged, or having loose connections at the components, all of which can cause reception issues.

  1. Disconnect the electrical connector: B270 Vehicle Performance Camera and K161 Vehicle Performance Data Recorder harness connector X3.
  2. Locate the appropriate pinout adapter and load test loop adapter from EL-52552 COAX FAKRA Cable Adaptor Kit.
  3. Connect the 2 adapters together, measure and record the resistance between the terminals at the pinout adapter.
  4. Disconnect the 2 adapters and connect each one to the appropriate end of the coax cable.
  5. At the pinout adapter test terminals, measure the total resistance of the coax cable loop including the connected load test adapter.
    • If not within 5 Ω of the reading from step 10. 

      Replace the coax cable

    • Go to next step: If within 5 Ω of the reading from step 10. 
  6. Replace the component: B270 Vehicle Performance Camera
  7. Verify the DTC does not set.
    • If the DTC is not set 

      All OK.

    • Go to next step: If the DTC sets 
  8. Replace the component: K161 Vehicle Performance Data Recorder.
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