ACIS Control Circuit

ACIS Control Circuit

Wiring Diagram:

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 between 2,200 and 4,100 rpm and the throttle valve opening angle is 60° or more, the ECM supplies current to the VSV (ON status), so the IACV will close. Besides that condition, the VSV is usually OFF and the IACV is open.



INSPECTION PROCEDURE

Step 1 - 2:

Step 3 - 4:

Step 5:

Hand-held tester

Step 1 - 2:

Step 2 (Continued) - 4:

Step 5:

OBD II scan tool (excluding hand-held tester)