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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC B3031: Security Controller In Learn Mode Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Verify all available keyless entry transmitters are correct for the vehicle. This can be accomplished by comparing the part number that is laser etched on the transmitter to the part number listed in the parts catalog.
    • If a transmitter is not correct 

      Replace the transmitter.

    • If all transmitters are correct 
  2. Verify the scan tool Immobilizer data displays two or more keys learned to the vehicle.
    • If two or more keys are not displayed 

      Add one additional key

    • If two or more keys are learned to the vehicle 
  3. Perform the Replacing Transmitters procedure. Refer to Remote Control Door Lock and Theft Deterrent Transmitter Programming .
  4. Verify the K9 Body Control Module learns the transmitter and exits the learn mode. The scan tool Master Keys Learned parameter should increment to 1.
    • If the K9 Body Control Module does not exit the learn mode after the programming attempt 

      Replace the K9 Body Control Module.

    • If the K9 Body Control Module exits the learn mode after the programming attempt 
  5. All OK.
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