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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC B302A: Mobile Telephone Communications Interface Requested Immobilization >> Circuit/System Verification
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Circuit/System Verification

  1. Verify the OnStar® system is not damaged and is operating properly, with no DTCs set.
    • If the OnStar® system is damaged, inoperative or any OnStar® DTCs are set 

      These concerns must be corrected before the start disable can be removed.

    • If the OnStar® system is not damaged and is operating properly 
  2. Press the blue OnStar® button and ask the advisor to be transferred to the stolen vehicle team to verify the vehicle account has been updated.
  3. Verify that OnStar® is aware the vehicle has been recovered and that the vehicle account has been updated.
    • If OnStar® has not been notified that the vehicle has been recovered 

      Contact the customer and advise them that for security purposes, they must contact OnStar® and the law enforcement agency to update the vehicle account.

    • If the account has been properly updated 
  4. Once the vehicle account has been updated and the start disable request has been removed, DTC B302A will transition to a history DTC. Clear the history DTC.