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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 B3902: Incorrect Immobilizer Identifier Received >> Circuit/System Verification
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Circuit/System Verification

  1. Perform the Programming and Setup procedure for the control module that set DTC B3902.
    NOTE: When performing the following step, Immobilizer System Component Programming, the module may also need to be reset by using the SPS function Prepare For Removal.
  2. Perform the Immobilizer System Component Programming .
  3. Verify DTC B3902 does not set after programming.
    • If the DTC sets after programming 

      Replace the control module that set the DTC.

    • If the DTC does not set after programming 
  4. All OK.
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