Anti-Theft Systems - Passive: Description

Passive Anti-Theft System (PATS) is designed to prevent driveaway thefts. PATS is passive in that it does not require any activity from the user. System uses radio frequency identification technology to verify if proper key is being used to attempt to start the vehicle.

During each starting sequence, the encoded ignition key is interrogated by vehicle anti-theft electronics. If key's identification code is programmed into anti-theft system, vehicle is capable of starting. If key's identification code is incorrect or missing, vehicle is prevented from starting.

PATS module communicates with the Powertrain Control Module (PCM) through Standard Corporate Protocol (SCP) network. PCM then determines if engine will be enabled to start. All elements of PATS must be functional, or vehicle will not start. If PCM prevents vehicle from starting because of PATS, PCM will store a Diagnostic Trouble Code (DTC) in memory.

PATS vehicle protection system consists of these components: PATS module, PCM, anti-theft indicator (THEFT) light, PATS transceiver module, encoded ignition key, SCP communication network and Data Link Connector (DLC).