Vehicle Theft Security System

This passive system is designed to protect against vehicle theft. The vehicle theft security system (VTSS) is part of the body control module (BCM), which monitors vehicle doors and the ignition for unauthorized operation. The alarm activates by sounding the horn, flashing the headlamps, park and tail lamps, and the VTSS indicator lamp. Passive arming occurs upon normal vehicle exit by turning the ignition off, opening the driver's door, locking the doors with the power lock, and closing the driver's door or locking the doors with RKE. Manual arming occurs by using the key to lock the doors after closing them. The indicator lamp on the dash will flash for 15 seconds, showing that arming is in progress. If no monitored systems are activated during this period, the system will arm and the indicator will flash at a slow rate. If the indicator lamp remains steadily lit during the arming process, this can indicate a possible loss of communication with the PCM or loss of trunk knock out switch. When something triggers the alarm, the system will signal the headlamps, park lamps, and horn for about 3 minutes.

For complaints about the Theft Alarm going off on it's own use the DRBIII® and select "BCM" then "Input/Output" and read the "Last VTSS cause" status.

Tamper Alert  - The VTSS indicator lamp will flash twice quickly to indicate a tamper condition has occurred.

Manual Override  - The system will not arm if the doors are locked using the manual lock control (by hand) or if the locks are actuated by an inside occupant after the door is closed.

To verify the system, proceed as follows:

1. Open the driver's door.
2. Remove the ignition key (but keep it in hand).
3. Lock the doors with the power lock switch or the RKE.
4. Close the driver's door.