Antitheft and Alarm Systems: Description and Operation

Anti-Theft

Passive Anti-Theft System (PATS) consists of the following components:

- Anti-theft indicator

- PATS (Passive Anti-Theft System) key

- PATS (Passive Anti-Theft System) transceiver

- Instrument Cluster (IC)

- PCM

PATS (Passive Anti-Theft System) protects the vehicle from theft by preventing the engine from starting unless a programmed key is used.

Passive Anti-Theft System (PATS) Operation

PATS (Passive Anti-Theft System) prevents the engine from starting by disabling the starter relay and fuel injector operation. If an unprogrammed key is used or if there is a PATS (Passive Anti-Theft System) system concern, the anti-theft indicator in the IC (Instrument Cluster) flashes rapidly and the engine does not start. PATS (Passive Anti-Theft System) cannot disable an already running engine.

Passive Anti-Theft System (PATS) Keys

Depending upon option content, the vehicle comes from the factory with one of three different key options.

Integrated Keyhead Transmitter (IKT)





For vehicles equipped with Remote Keyless Entry (RKE), the vehicle comes equipped from the factory with two programmed IKTs (Integrated Keyhead Transmitters). The IKT (Integrated Keyhead Transmitter) incorporates both the PATS (Passive Anti-Theft System) and RKE (Remote Keyless Entry) transmitter functions in a single device. The key programming is a two step procedure. PATS (Passive Anti-Theft System) information is programmed into the IC (Instrument Cluster) and then the RKE (Remote Keyless Entry) transmitter is programmed into the Generic Electronic Module (GEM). The vehicle accepts the programming of up to 8 keys. Refer to the key programming procedures for PATS (Passive Anti-Theft System) programming, and then refer to RKE (Remote Keyless Entry) Transmitter Programming in Doors, Hood and Trunk &/or Locks to program the RKE (Remote Keyless Entry) transmitter.

Conventional Passive Anti-Theft System (PATS) Key

NOTE: The conventional PATS (Passive Anti-Theft System) key can be identified by a blue cap with "W1" stamped in it.





The vehicle can also come equipped from the factory with two programmed conventional PATS (Passive Anti-Theft System) keys (Canadian vehicles only). The vehicle accepts the programming of up to 8 keys. Refer to the key programming procedures for PATS (Passive Anti-Theft System) programming. If requested by the customer this conventional key can be programmed to a vehicle equipped with IKTs (Integrated Keyhead Transmitters).

Conventional Non-Passive Anti-Theft System (PATS) Key

NOTE: The conventional non-PATS (Passive Anti-Theft System) key can be identified by a black cap.

NOTE: If this key is used on a vehicle equipped with PATS (Passive Anti-Theft System), the vehicle will experience a PATS (Passive Anti-Theft System) no start.





For vehicles without PATS (Passive Anti-Theft System), the vehicle comes equipped from the factory with a conventional non-PATS (Passive Anti-Theft System) key (U.S. vehicles only).