ACIS Control Circuit

ACIS CONTROL CIRCUIT

CIRCUIT DESCRIPTION

HINT: The engine has 2 VSVs (No.1 and No.2)
ACIS stands for "Acoustic Control Induction System".




This circuit opens and closes the Intake Air Control (IAC) valve No. 1 and No. 2 in response to the engine load in order to increase the intake efficiency.

When the engine speed is 4,100 rpm or less and the throttle valve opening angle is 30° or more, the ECM turns the two VSVs On or Off and operates the IAC valve.

Wiring Diagram:

INSPECTION PROCEDURE

Step 1:

Step 2:

Step 3:

Step 4 - 5:

Hand-held Tester

Step 1:

Step 2:

Step 3:

Step 4:

OBD II scan tool (Excluding hand-held tester)