Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSIACV CONTROL CIRCUIT
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
IACV Control Circuit
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION IACV Control Circuit
IACV Control Circuit
DESCRIPTION
This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is 4,700 rpm or more and the throttle valve opening angle is 60 degree or more, the IACV is open (VSV: OFF). At all other times, the IACV is closed (VSV: ON).
INSPECTION PROCEDURE
DESCRIPTION
IACV Control Circuit:
This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is 4,700 rpm or more and the throttle valve opening angle is 60 degree or more, the IACV is open (VSV: OFF). At all other times, the IACV is closed (VSV: ON).
Wiring Diagram:
Step 1-3:
Step 4-5:
Step 5(continued):
INSPECTION PROCEDURE
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.