OEM Immobilizer Equipped Vehicles There are three (3) types of OEM immobilizers: the Passkey system, the Passlock system, and the Transponder (RFID) system. It should be noted that all keyless electronic ignition equipped vehicles are Transponder equipped. The GM Passkey anti-theft system. The GM Passkey anti-theft system uses one of 15 different resistor chips, which are mounted in the key blade. There are two (2) Passkey electrical contacts mounted inside the ignition lock outer cap. Once the key is inserted through the ignition lock outer cap and into the ignition lock keyway, the Passkey electrical contacts determine the resistor chip value. If the resistor value is authenticated, engine functions are enabled. The GM Passlock anti-theft system. The GM Passlock system contains a Passlock sensor, which is mounted on either the assembly housing or on the ignition lock cylinder, depending if the ignition lock is steering column mounted or dashboard mounted. A magnet is mounted on the ignition lock core. Rotation of the ignition lock passes the magnet past the Passlock sensor creating the proper Passlock signal to enable engine functions. The Transponder (RFID) anti-theft system. The Transponder (RFID) anti-theft system is equipped with a ring antenna and a transceiver. The transponder chip/data is stored in the key head/fob. This data is passed by electromagnetic induction at the ring antenna and sent via the transceiver to a control module. Once the transponder data is authenticated the vehicle engine functions are enabled. If there is no key present, or the transponder data is incorrect, the vehicle engine functions remain disabled. Note: Please reach out to us via email or phone to inquire if a vehicle is equipped with an OEM Transponder (RFID) anti-theft immobilizer system. Post navigation The Key Is The Key
