Vehicle Control Module

The VCM communicates with the Passlock/EVO Module over the Class 2 serial data line. When the Passlock TM/EVO 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)/EVO Module receives the expected voltage from the Passlock(TM) sensor, the Passlock(TM)/EVO 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)/EVO 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/EVO Module as the last learned one, the vehicle will start and quickly stalls due to the Fuel Lockout.