PASSLOCK System Operation

Engineers design the Passlock(TM) system in order to prevent the theft of the vehicle if a mechanical key does not start the vehicle. During normal operation, the mechanical key turns the Passlock(TM) lock cylinder. The Passlock(TM) lock cylinder relays a resistance code (R-Code) to the instrument cluster. The instrument cluster determines the validity of the R-Code within a preset time window. The window begins when the ignition switch turns. The instrument cluster sends a coded password to the powertrain control module (PCM). If the PCM receives the correct code, the PCM will allow the fuel injectors to operate normally.


The system contains the following components:
^ The Passlock(TM) lock cylinder
^ The ignition switch
^ The instrument cluster
^ The powertrain control module (PCM)