ACIS Control Circuit: Description
This circuit opens and closes the intake air control valve assembly in response to changes in the engine load in order to increase the intake efficiency using the acoustic control induction system.
When the engine speed is between 0 and 4450 rpm and the throttle valve opening angle is 60° or more, the ECM supplies current to the actuator (on status), to close the intake air control valve assembly. Under other conditions, the actuator is usually off and the intake air control valve assembly is open.