Alarm Module: Description and Operation

The Passlock(TM) Module contains the theft deterrent system logic. The Passlock(TM) Module reads the Passlock(TM) data from the Passlock(TM) Sensor. If the Passlock(TM) data is correct, the Passlock(TM) Module will pass the theft test. The Passlock(TM) Module will then transmit the password to the VCM/PCM.

During the tamper mode the vehicle may Start. The vehicle will quickly stall. If the Passlock(TM) Module receives the wrong Passlock(TM) data, the VTD will immediately go into the tamper mode. The tamper mode will lock-out the vehicle fuel injectors for 10 minutes. The SECURITY indicator will flash while the VTD is in the tamper mode.

If the Passlock(TM) Sensor sends a correct password to the Passlock(TM) Module when the ignition is in the ON position, the Passlock(TM) Module will send a fuel enable signal to the VCM/PCM. The VCM/PCM will not disable the fuel due to any Passlock(TM) Module message for the remainder of the ignition cycle.