Idle Speed/Throttle Actuator - Electronic: Description and Operation

PURPOSE

The Air Control Valve (ACV) is used to maintain proper idle speeds during varying conditions.

OPERATION

The ACV receives a continuous signal the Engine Control Module (ECM). By varying the ON/OFF time ratio of the signal, the ECM is able to control the size of the air passage through the valve. Air passing through the valve bypasses the throttle which, causes an increase in idle speed.