IACV Control VSV Circuit

CIRCUIT DESCRIPTION

Wiring Diagram:

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 60 ° 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.

INSPECTION PROCEDURE

Steps 1 - 2:

Step 3:

TOYOTA hand-held tester

Steps 1 - 2:

Step 3:

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