ACIS Control Circuit: Description
WARNING: This page is about a different variant/trim than selected.
This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is between 0 and 4, 450 rpm and the throttle valve opening angle is 60° or more, the ECM supplies current to the VSV (ON status) to close the IACV. Under other conditions, the VSV is usually OFF and the IACV is open.