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HOMESERVICE MANUALSCHEVROLET2019TRAX PREMIER, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 88 (IMMOBILIZER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B3935CIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Trax Premier, AWD

Circuit/System Verification

2019 Chevrolet Trax Premier, AWDSECTION 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.
  1. Ignition ON.
  2. 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 
  3. 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 
  4. All OK.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.