Immobilizer System Symptom Troubleshooting Procedures
  1. Troubleshoot the immobilizer system by the order of the priority shown:
    Order of Priority
    Symptom
    Possible cause
    1
    Immobilizer indicator blinks after the ignition switch turned OFF.
    Symptom troubleshooting.
    2
    Engine does not start with the immobilizer key.
    Symptom troubleshooting.
    3
    Immobilizer indicator does not come on.
    Check the MIL indication.
    • If the MIL comes on, go to the Fuel and Emissions system MIL circuit troubleshooting.
    • If the MIL does not come on, go to the gauge control module (tach) self-diagnostic function.
    4
    Immobilizer indicator does not go off.
    Symptom troubleshooting.