PASSLOCK(tm) SYSTEM

When mechanical key turns the Passlock(tm) lock cylinder, a signal is created by a rotating magnet turning past a stationary Hall effect sensor. This signal is sent to the Body Control Module (BCM). The BCM determines the validity of the signal within a preset time window, then sends a coded password to the Power Control Module (PCM), which then allows the fuel injectors to operate normally.

If the signal is not read within the preset time window, the Vehicle Theft Deterrent (VTD) system will go into SHORT TAMPER mode. During this short tamper mode, the vehicle will not operate for 4 seconds and theft warning light will flash. After 3 consecutive failed time window readings, or if wrong signal is read, the VTD will go into LONG TAMPER mode. During the long tamper mode, the fuel injectors will be shut off for 10 minutes and SECURITY indicator light will flash. Vehicle may crank and temporarily start during tamper modes, but will soon stall due to fuel shut-off.