Acoustic Control Induction System (ACIS) Control Circuit: Notes
WARNING: This page is about a different variant/trim than selected.
NOTE:
ACIS control circuit may also be referred to as Intake Air Control Valve (IACV) system control circuit.
NOTE:
On Avalon models, 2 intake air control valve VSVs are used. Intake air control valve No. 1 VSV is for intake air control valve near throttle bodies which may also be referred to as No. 1 intake air control valve. Intake air control valve No. 2 VSV is for intake air control valve on end of air intake chamber which may also be referred to as No. 2 intake air control valve.
CAUTION:
If Engine Control Module (ECM) replacement is instructed in the following testing, always ensure ECM wiring harness electrical connector and ground circuits are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction.