Vehicle/Powertrain Control Module

The VCM/PCM communicates with the EVO/Passlock Module over the Class 2 serial data line. When the EVO/Passlock (TM) Module determines a no start condition, it sends a Class 2 serial data password to the VCM/PCM in order to disable the fuel injection system. If the EVO/Passlock (TM) Module receives the expected voltage from the Passlock (TM) sensor, the EVO/Passlock (TM) Module sends a Class 2 serial data password to the VCM/PCM in order to enable the fuel injection system. The VCM/PCM then allows the vehicle to start correctly. If the Class 2 serial data password from the EVO/Passlock (TM) Module to the VCM/PCM 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/PCM does not receive the same password from the EVO/Passlock (TM) Module as the last learned one, the vehicle will start and quickly stalls due to the Fuel Lockout.