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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Park Brake) >> Diagnostic Information and Procedures >> DTC C1280 or C1281 >> 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. Ignition ON.
  2. Verify that no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Reprogram the K17 Electronic Brake Control Module/K160 Brake System Control Module. Refer to Control Module References
  4. Ignition ON. Apply and release the park brake.
  5. Verify that DTC C1280 or C1281 is not set.
    • If DTC C1280 or C1281 is set 
    1. Replace the K17 Electronic Brake Control Module/K160 Brake System Control Module.
    2. Ignition ON.
    3. Verify that DTC C1280 or C1281 is not set.
      • If DTC C1280 or C1281 is set, replace the Control Module that set the DTC.
      • Go to next step: If DTC C1280 or C1281 is not set
    4. All OK.
    • Go to next step: If DTC C1280 or C1281 is not set 
  6. All OK.
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