System and Component Description

Anti-Theft System, Passive
The passive anti-theft system uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user.

- During each vehicle start sequence, the ignition key identification code is requested by the vehicle protection anti-theft electronics.

- If the key's ID code has been programmed into the system, the Powertrain Control Module (PCM) is signaled to enable the vehicle to start.

- If the key's ID code is not programmed into the system, or if no encoded key is detected, then the PCM is signaled to disable the vehicle from starting.

The passive anti-theft system communicates the state of the security system to the PCM via the J 1850 communications network. The PCM, based on the communication from the passive vehicle system, will determine if the vehicle's engine is enabled to start.

The passive anti-theft system differs from the active anti-theft alarm system in that the passive anti-theft system enables/disables the vehicle from starting and only operates with the ignition switch in RUN/START position. The active anti-theft alarm system has perimeter protection capabilities and operates only with the ignition switch OFF.


Components

The passive anti-theft system contains the following components:
- passive anti-theft system module
- THEFT indicator in instrument cluster
- transceiver electronics
- PCM
- encoded ignition key
- J 1850 communications network
- Data Link Connector (DLC)