IACV Control Circuit

IACV CONTROL CIRCUIT

CIRCUIT DESCRIPTION




This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).

When the engine speed is 4,700 rpm or more and the throttle valve opening angle is 60° or more, the VSV is OFF, so the IACV is open. All the other times, the ECM turns the VSV ON and closes the IACV.

Wiring Diagram:

INSPECTION PROCEDURE

Step 1 - 2:

Step 3 - 4:

Step 5 - 6:

Hand-held tester

Step 1:

Step 2:

Step 3 - 4:

Step 5 - 6:

OBD II scan tool (excluding hand-held tester)