Circuit/System Testing

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify that DTC C0035, C0040, C0045, or C0050 is not set in the EBCM.
- If any listed DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle to diagnose that DTC prior to this diagnostic.
- Go to next step: If any listed DTC is not set
Replace the K17 Electronic Brake Control Module.
Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
- If the DTC sets
  Replace the module that set the DTC.
- Go to next step: If the DTC does not set
All OK.