Vehicle Theft Security System

The Vehicle Theft Security System (VTSS) is part of the Body Control Module (BCM). The BCM monitors the vehicle doors, liftgate, and the ignition for unauthorized operation. The alarm activates by sounding the horn, flashing the headlamps and the VTSS indicator lamp. The VTSS does not prevent engine operation; this is done with the Sentry Key Remote Entry Module (SKREEM). The VTSS indicator lamp will flash for approximately 15 seconds during the arming process. If there is no interruption during the arming process, upon completion the VTSS indicator lamp will flash at a slower rate. When the BCM receives an input to trigger the alarm, the BCM will control the outputs of the headlamps, horn, and VTSS lamp for approximately 15 minutes.

Arming (Active and Passive)
Active arming occurs when the ignition key is removed, the RKE transmitter or door key cylinders are used to lock the vehicle doors, whether the doors are open or closed. The arming process is complete only after all doors are closed. Passive arming occurs when the ignition key is removed, the driver door is opened, and the doors are locked with the power door lock switch, and the door is closed.

Disarming (Active and Passive)
Active disarming occurs when the RKE transmitter is used to unlock the vehicle doors. This disarming will also halt the alarm once it has been activated. Passive disarming occurs upon normal vehicle entry (unlocking driver door with the key) or turning the ignition switch on with a valid skim key. This disarming will also halt the alarm once it has been activated.

Tamper Alert
The VTSS tamper alert will sound the horn three times upon disarming after an initial alarming has occurred to indicate a tamper condition has occurred.

Manual Override
The system will not arm if an occupant uses the manual lock control to lock the doors or actuates the locks after closing the doors.

Diagnosis
For complaints about the Vehicle Theft Alarm triggering on its own, use the DRBIII(R) and read the VTA Tripped By status.

SENTRY KEY REMOTE KEYLESS ENTRY (SKREEM)
For engine Immobilizer functions, see the Powertrain Diagnostic information. For the Remote Keyless Entry functions, see the Door Module -Remote Keyless Entry information.