• The immobilizer system is a vehicle theft prevention device that only allows keys that have previously been registered to the vehicle to start the engine and prevents it from being started in any other manner (such as with an unregistered key or by starter relay short).
• The immobilizer system consists of the key (built-in transponder), coil, keyless unit, PCM, and security light (in the instrument cluster).
• Ignition keys for use with the immobilizer system have an electronic communication device (transponder) built into the key head that retains specific electronic codes (key ID number).
• The immobilizer system operates automatically when the ignition switch is turned to the LOCK or ACC position. When this occurs, the security light flashes repeatedly 0.1 s every 2 s.
• In order to start the engine, the immobilizer system must be made inoperable using a key previously registered with the vehicle. No special operation is required to release the immobilizer system but rather the vehicle is started similar to vehicles without the system: the ignition switch is turned from the LOCK or ACC position to the ON or START position and the release operation begins automatically. The engine can only be started after the key, keyless unit and PCM successfully perform their parts of the verification procedure. For details, refer to "IMMOBILIZER SYSTEM OPERATION".
• If the immobilizer system is not released due to a malfunction or verification failure, the security light in the instrument cluster displays a DTC. At the same time, DTCs are stored respectively in the PCM and keyless unit. The stored DTCs can be verified using the WDS. Repair the malfunctioning part using the verified DTCs. For details, refer to "ON-BOARD DIAGNOSTIC SYSTEM (IMMOBILIZER SYSTEM) MALFUNCTION DIAGNOSIS FUNCTION".
• The immobilizer system cannot be deactivated.