IACV Control VSV Circuit
CIRCUIT DESCRIPTION
This circuit opens and closes the IACV (Intake Air Control Valve) in response to the engine load in order to in-
crease the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is 3,900 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.
(See page EG–216).
EG–452
–ENGINE TROUBLESHOOTING CIRCUIT INSPECTION
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