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 MANAGEMENTEMISSION CONTROL SYSTEMSAIR INJECTIONAIR INJECTION CONTROL VALVETESTING AND INSPECTION
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Air Injection Control Valve: Testing and Inspection
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Testing and Inspection
INSPECTION
1. INSPECT AIR SWITCHING VALVE
a. Blow air into port A and check that air is not discharged from port B.
b. Apply positive battery between the terminals.
c. Blow air into port A and check that air is discharged from port B.
If operation is not as specified, replace the air switching valve.
2. INSPECT NO.2 AIR SWITCHING VALVE
a. Blow air into port B and check that air is not discharged from port C.
b. Apply vacuum (30 kPa (306 gf/sq.cm, 4.35 psi) to port A, blow air into port B and check that air is discharged from port C.
If operation is not as specified, replace the No.2 air switching valve.
1. INSPECT AIR SWITCHING VALVE
a. Blow air into port A and check that air is not discharged from port B.
b. Apply positive battery between the terminals.
c. Blow air into port A and check that air is discharged from port B.
If operation is not as specified, replace the air switching valve.
2. INSPECT NO.2 AIR SWITCHING VALVE
a. Blow air into port B and check that air is not discharged from port C.
b. Apply vacuum (30 kPa (306 gf/sq.cm, 4.35 psi) to port A, blow air into port B and check that air is discharged from port C.
If operation is not as specified, replace the No.2 air switching valve.
RENDER: 1.0x
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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.