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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 135 (12 V Starting And Charging - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC C15C5 >> 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 DTC's P0615, P0616 or P0617 are not set
    • Go to next step: If the DTC is not set 
  2. Clear the DTC C15C5.
  3. Test drive the vehicle under the condition for setting the DTC,
  4. Verify the DTC does not set
    • If the DTC resets 

      Replace the K160 Brake System Control Module.

    • Go to next step: If the DTC does not reset 
  5. A fault is not currently present and may be an intermittent condition. Refer to Diagnostic Instructions.
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