Vehicle Theft Alarm (VTA) System

The optional Vehicle Theft Alarm (VTA) 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 alarm 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 groups. 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 VTA system uses a Light Emitting Diode (LED) located on the top of the instrument panel to indicate when the system is ARMED. The LED is supplied power on circuit M1. This circuit is the Ignition-Off Draw (IOD) circuit and protected by a 10 Amp fuse located in cavity 13 of the junction block. The BCM controls ground for the LED on circuit G69.