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 MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1 (ENGINE CONTROLS - REMOVAL, OVERHAUL, INSTALLATION)AIR INDUCTION SYSTEMINTAKE AIR CONTROL VALVEREMOVAL (SC300)
2004 Toyota Matrix XR, FWD, Standard
Removal (SC300)
2004 Toyota Matrix XR, FWD, StandardSECTION Removal (SC300)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2000 Lexus SC 400, 2000 Lexus SC 300, 2000 Lexus RX 300, 2000 Lexus LX 470, and 2000 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.
- Intake Air Control (IAC) valve is mounted underneath middle of air intake chamber. See Figure. Remove engine oil dipstick. Remove bolt and A/T oil dipstick and guide. Remove A/T oil dipstick guide "O" ring. Remove bolt and disconnect engine wiring harness protector from air intake chamber. Disconnect brake booster vacuum hose from intake chamber. Remove union bolt, brake booster union and gaskets.
- Remove intake air connector-to-air intake chamber bolts and nuts. Disconnect Power Steering (PS) hose and No. 2 vacuum pipe hose from air intake chamber. Disconnect Intake Air Control (IAC) valve (ACIS actuator) hose. See Figure. Disconnect Data Link Connector (DLC) No. 1 from air intake chamber. Remove bolts, nuts, air intake chamber and gaskets. Remove IAC valve.
- If servicing vacuum tank or ACIS vacuum switching valve, remove bolt and accelerator cable clamp. Disconnect ACIS vacuum switching valve connector. Disconnect vacuum hoses from vacuum tank and remove ACIS vacuum switching valve. Remove nuts and vacuum tank from intake manifold.
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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.