Circuit Operation

CIRCUIT OPERATION
The optional Vehicle Theft Security System (VTSS) is used to protect the vehicle from theft, by monitoring the vehicle doors, ignition switch, power door lock circuits, and the trunk key cylinder to determine if the horn should be sounded and the ignition system disabled.

The Body Control Module (BCM) is used as the control for the system. The inputs for the system are divided in two sections. The trunk area and the passenger compartment. If there is a malfunction in the trunk area switch the system will still ARM but the switch will not be monitored. If the switch becomes functional while the system is ARMED it will be used as an input to the BCM. A problem in any passenger compartment switch will not allow the system to ARM.

The VTSS system uses a Light Emitting Diode (LED) located in the instrument cluster to indicate when the system is ARMED. The LED is supplied power on circuit F33 at the instrument cluster. The BCM controls ground for the LED on circuit G69.