IACV Control Circuit

CIRCUIT DESCRIPTION
This circuit opens and closes the IACV (Intake Air Control Valve) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is 3,700 rpm or less and the throttle valve opening angle is 30° or more, the ECM turns the two VSV ON or OFF and operate the IACV.




WIRING DIAGRAM

INSPECTION PROCEDURE

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TOYOTA hand-held tester:

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Step 3:

OBD II scan tool (excluding TOYOTA hand-held tester):