Anti-Theft System: Operation

When mechanical key turns the Passlock™ lock cylinder, a Resistance Code (R-Code), is created by a rotating magnet turning past a stationary hall effect sensor. R-Code is sent to the BCM. The BCM determines the validity of the R-Code within a preset time window, then sends a coded password to the PCM, which then allows the fuel injectors to operate normally.

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