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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 B1AC0 >> 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.
  1. Verify the USB cable between K161 Vehicle Performance Data Recorder connector X4 and X20 Card Reader Receptacle connector X2 is properly connected and there is no damage to the cable or connections.
    • If connection problems or cable damage is noted. 

      Perform the appropriate repair or replacement to correct any issues.

    • Go to next step: If no connection problems or cable damage is noted. 
  2. Connect the EL-50334-50 to the X20 Card Reader Receptacle connector X2 and the K161 Vehicle Performance Data Recorder connector X4.
  3. Ignition ON, performance data recorder system ON.
  4. Operate system and verify DTC does not set.
    • If DTC sets 
    1. Replace the X20 Card Reader Receptacle.
    2. Operate system and verify DTC does not set.
      • If DTC sets 

        Replace the K161 Vehicle Performance Data Recorder.

      • Go to next step: If DTCs not set 

        Go to next step: All OK.

    • Go to next step: If DTCs not set 
  5. Replace the USB harness.
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