Vehicle Control Module

The VCM communicates with the Passlock Module over the Class 2 serial data line. When the Passlock TM Module determines a no start condition, it sends a Class 2 serial data password to the VCM in order to disable the fuel injection system. If the Passlock TM Module receives the expected voltage from the Passlock TM sensor, the Passlock TM Module sends a Class 2 serial data password to the VCM in order to enable the fuel injection system. The VCM then allows the vehicle to start correctly. If the Class 2 serial data password from the Passlock TM Module to the VCM is not within the Vehicle Security Status Message, the fuel injectors will shut OFF during a start attempt. The SECURITY telltale will be ON STEADY for approximately 10 minutes and then turns OFF. If the VCM does not receive the same password from the Passlock TM Module as the last learned one, the vehicle will start and quickly stalls due to the Fuel Lockout.