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 VSV ON and closes the IACV. At all other times, the VSV is OFF, so the IACV is open.

WIRING DIAGRAM

INSPECTION PROCEDURE

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LEXUS hand-held tester

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OBD II scan tool (excluding LEXUS hand-held tester)