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Home >> Chevrolet >> 2018 >> Sonic Premier, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 176 (Trailer Brake Controls System) >> Diagnostic Information and Procedures >> DTC C111A >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2018 GMC Canyon and 2018 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC C111A 54 or C1114 00 is not set.
    • If DTC C111A 54 or C1114 00 is set 

      Refer to the diagnostic procedure for DTC C1114 00 to diagnose this concern.

    • Go to next step: If DTC C111A 54 or C1114 00 is not set 
  3. Verify DTC C111A 43 is not set
    • If DTC C111A 43 is set 

      Replace the K133 Trailer Brake Power Control Module

    • Go to next step: If DTC C111A 43 is not set 
  4. All OK
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