Vehicle Theft Security System

Vehicle Theft Security System (VTSS) is part of the Body Control Module (BCM) that monitors vehicle doors, hood, liftgate, 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 Programmable Communication Interface (PCI) 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 must be enabled. This procedure must also be performed if BCM is replaced. To enable VTSS, see BODY CONTROL MODULE  under PROGRAMMING.