General System Description

DESCRIPTION and OPERATION
The theft warning system provides the vehicle with protection from unauthorized entry into the passenger compartment and engine compartment (hood opening). It also protects against engine starting through ignition keylock cylinder tampering. If triggered, the system provides both audio and visual alarm signals and disables the starter circuit.

The system is controlled by a receiver assembly. This assembly also controls the electronic door lock control system functions. System anti-theft functions are:
- Perimeter sensing - doors, trunk, hood
- Ignition keylock cylinder sensing
- Starter interrupt
- LED flashing when system is armed
- Alarm (horn and lights)

When armed, unauthorized entry into the vehicle is detected by a hood switch or the door ajar switches. The hood switch is monitored directly by the receiver assembly. The door ajar switches are monitored by the Generic Electronic Module (GEM). The GEM module signals the receiver assembly when a door is ajar (opened). If the anti-theft system is armed, this signal will trigger the receiver assembly. The door ajar signal will also prevent arming of the system if a door or liftgate is not fully closed.

Once triggered, the system flashes, the parking lamps, the theft LED indicator, and sounds the horn. In addition, the starter circuit is interrupted until the system is disarmed.

COMPONENTS
The system is composed of the following components:
- Receiver assembly
- Anti-theft warning indicator (output)
- Door/liftgate disarm (input)
- Hood switch (input)
- Ignition keylock cylinder sensor (input)
- Starter interrupt relay (output)

The following components already exist on the vehicle and are also used in the anti-theft system
- Horn relay (output)
- Parking lamps
- Generic Electronic Module (input and output)
- Starter relay
- Park lamp autolamp/exit delay relay (output)