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Circuit/System Testing

WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC C012A is not set.
    • If DTC C012A is set 
    1. Replace the Q5 Brake Pressure Modulator.
    2. Verify that DTC C012A is not set while driving the vehicle under normal braking conditions.
      • If DTC C012A is set, replace the K17 Electronic Brake Control Module.
      • Go to next step: If DTC C012A is not set.
    3. All OK.
    • Go to next step: If DTC C012A is not set 
  3. All OK.
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