Circuit/System Verification

WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify the scan tool Immobilizer Allows Engine to Start parameter is Valid when using each vehicle key.
- If Authentication Error
  NOTE:
  Perform the appropriate key procedures for this vehicle. Not all vehicle models and years are the same.
  
  Replace the keys.
- Go to next step: If Valid
Verify DTC B3935 does not set while operating the vehicle under the conditions for running the DTC.
- If the DTC is set
  Replace the K9 Body Control Module.
- Go to next step: If the DTC is not set
All OK.