Antitheft and Alarm Systems: Description and Operation

VEHICLE THEFT/SECURITY SYSTEM

Vehicle Theft/Security System
Vehicles equipped with the Vehicle Theft/Security System (VTSS), the doors, deck lid, hood and ignition circuit are monitored by the Body Control Module (BCM) when the system is armed.

The VTSS will prevent the engine from starting until the BCM receives a disarm signal. If the VTSS is triggered, the horn will pulse, headlamps/marker lamps will flash, and the VTSS warning lamp will flash. If BCM determines the threat to be false and the VTSS is not triggered again, the system will shut down and rearm itself after three minutes. The VTSS monitoring portion of the system is split into two sections. The engine compartment and the passenger compartment. If a malfunction occurs in the engine compartment, the passenger compartment would still arm and function normally. If an electrical malfunction occurs in either of the system a Diagnostic Trouble Code (DTC) would be stored in the BCM memory to aid system repair. DTC(s) can be retrieved using DRB III(R) scan tool attached to the data link connector located at the left cowl panel.

Time-out Period
The VTSS requires 16 consecutive seconds to time-out and arm the VTSS.

If a door is key unlocked, key fob unlocked, or the ignition is switched ON, the VTSS will cancel out. To reset the VTSS, perform Methods A or B.

Triggering The VTSS
After the VTSS is armed, any of the following actions will trigger the system:
- Opening of either door.
- Opening the hood
- Opening the deck lid
- Turning the ignition switch to the ON or unlock position.

Enabling
The Body Control Module is shipped with the VTSS feature enabled state. Upon enabling the VTSS on the BCM, it will start transmitting the OK to start message to the Powertrain Control Module. At this time the visual alarm outputs the headlamps and marker lamps will function. However the audio alarm output the horn and engine disable portion of the VTSS will not function until there has been four consecutive engine run cycles. When this has occurred the total VTSS will function.

If during alarm being set the BCM receives a request from the RKE module to enter PANIC mode the BCM will cancel the alarm, return VTSS armed state and then perform the RKE PANIC feature.

Deck Lid
Access to the deck lid area of the vehicle will not be allowed without disarming the system. When the VTSS is properly disarmed the tamper alert feature will pulse the horn three times if an attempt tamper with the deck lid has taken place.