4.30.1 Hardware Check

This monitor checks the oil control valve on both Banks A and B. The commanded and the actual state of the valve are continually checked as long as the PWM drive signal remains within limits. If the commanded and the actual state differ for longer than a predefined time period then a failure is registered. The ECM determines the type of failure by examining which state the valve was unable to attain and the output signal to the valve. If a failure is registered on two drive cycles, the MIL will illuminate.