Acoustic Control Induction System Control Circuit: Notes

NOTE: Acoustic Control Induction System (ACIS) control circuit may also be referred to as Intake Air Control Valve (IACV) system control circuit.

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 defective, repair and repeat testing to confirm ECM malfunction.