Vehicle Theft Security System (VTSS)

VTSS is part of the Body Control Module (BCM) that monitors vehicle doors, hood, liftgate key cylinder and ignition for unauthorized operation/entry. When alarm is triggered, the horn will sound for 3 minutes and the headlights will flash for 15-18 minutes.

When an unauthorized entry into vehicle occurs, the VTSS module signals the Powertrain Control Module (PCM) via CCD bus that it is not okay to start the engine. The PCM then "zeros out" the pulse width of the fuel injectors, thus preventing the engine from starting (start/stall condition). The engine will not start until VTSS is disarmed. An initialization procedure included in VTSS requires that vehicle record 4 engine cranking cycles before allowing VTSS module to function. For this reason, VTSS requires verification. This procedure must also be performed if Body Control Module (BCM) is replaced. To verify VTSS, see VEHICLE THEFT SECURITY SYSTEM (VTSS)  under PROGRAMMING.