Operation CHARM: Car repair manuals for everyone.
Home >> Toyota >> 2001 >> Sienna XLE V6-3.0L (1MZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> IACV Control VSV Circuit
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

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)

pro multis · About Operation CHARM