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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Antilock Brake System - Except Hybrid) >> Diagnostic Information and Procedures >> DTC C1255: Electronic Control Unit Performance Malfunction >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition ON.
  2. Verify DTC C1255 does not set while operating the vehicle within the Conditions for Running the DTC.
    • If DTC sets 

      Replace the module that set the DTC

    • If DTC does not set 
  3. All OK.
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