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VEHICLE THEFT/SECURITY SYSTEMS

INTRODUCTION
The Vehicle Theft Security System (VTSS) is an available factory-installed option on this model. Refer to 8W-39 - Vehicle Theft Security System in Group 8W - Wiring Diagrams for complete circuit descriptions and diagrams.
VEHICLE THEFT SECURITY SYSTEM
The Vehicle Theft Security System (VTSS) is designed to provide perimeter protection against unauthorized use or tampering by monitoring the vehicle doors and the ignition system. If unauthorized use or tampering is detected, the system responds by sounding the horn, flashing the headlamps, and providing an engine no-run feature. Following are general descriptions of the features and major components of the VTSS. Refer to the owner’s manual in the vehicle glove box for more information on the features, use and operation of the vehicle theft security system.
ENABLING
If the vehicle is so equipped, the Vehicle Theft Security System (VTSS) feature is enabled in the high-line Central Timer Module (CTM) before the vehicle is shipped from the factory. However, if a vehicle with VTSS requires CTM replacement, the VTSS feature must be enabled in the new CTM using a DRB scan tool. Refer to the Vehicle Theft Security System menu item on the DRB scan tool for the procedures. The VTSS engine no-run feature is disabled when it is shipped from the factory. This is done by programming within the Powertrain Control Module (PCM). The logic in the PCM prevents the VTSS engine no-run feature from arming until the engine start counter within the PCM sees twenty engine starts. The VTSS no-run feature must be enabled when the vehicle is received from the assembly plant. Once the VTSS engine no-run feature has been enabled, it cannot be disabled unless the PCM is replaced with a new unit. The same VTSS engine norun feature enable logic will apply anytime the PCM is replaced with a new unit.
ARMING
Passive arming of the Vehicle Theft Security System (VTSS) occurs when the vehicle is exited with the key removed from the ignition switch, the headlamps are turned off, and the doors and liftgate are locked while they are open using the power lock switch or locked after they are closed by turning either front door lock cylinder or the liftgate lock cylinder to the lock position using the key. Passive arming will not begin until all the doors and the liftgate are closed. The power lock switch will not function if the key is in the ignition switch or the headlamps are turned on with the driver side front door open.