Anti-Theft Systems - Passive: Description

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

• THEFT indicator Light.
• Encoded ignition key.
• PATS transceiver module.
• Powertrain Control Module (PCM).
• Data Link Connector (DLC).
• System related fuses and wiring.

Passive Anti-Theft System (PATS) transceiver module, located behind steering wheel column shroud, that contains an antenna connected to a small electronic module, reads encoded ignition key identification code during each vehicle start sequence. If identification code is programmed into anti-theft system, vehicle is capable of starting. If identification code is incorrect or missing, vehicle is prevented from starting.

PATS transceiver module communicates with Powertrain Control Module (PCM) through Module Communication Network. PCM then determines if engine will be enabled to start. If PCM prevents vehicles from starting because of PATS, a Diagnostic Trouble Code (DTC) will be stored in memory.

PATS is also known as SecuriLock. PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. Remote start systems must be removed before investigation of PATS-related no start issues. The PATS will be activated and will disable the vehicle from starting if there is a:

• Damaged encoded ignition key.
• Damaged transceiver.
• Damaged PCM.
• Damaged wiring.
• Improper encoded ignition key.
• Non-encoded key (key has no electronics).
• Unprogrammed key.