Disabling the engine unless the PASSLOCK™ lock cylinder is correctly engaged by a mechanical key. The PASSLOCK™ system is designed to prevent vehicle theft. This system is similar in concept to the Passkey system. The PASSLOCK™ eliminates the need for a key mounted resistor pellet. The components of this system are as follows:

If the mechanical key is not used to start the vehicle, the PASSLOCK™ system is designed to prevent vehicle operation. The mechanical key, in normal operation, will turn the PASSLOCK™ lock cylinder. The PASSLOCK™ lock cylinder will relay a Resistance Code (R-Code) to the instrument cluster. Within a preset time window started from an ignition switch input and will send a coded password to the powertrain control module (PCM). The instrument cluster will determine the validity of the R-Code. For the fuel injectors to operate normally, the powertrain control module (PCM) receives the correct code.