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 119 (ENGINE CONTROLS (REMOVAL & INSTALLATION))FUEL SYSTEMTHROTTLE BODYREMOVAL (RX300)

2004 Toyota Matrix XR, FWD, Standard

Removal (RX300)

2004 Toyota Matrix XR, FWD, StandardSECTION Removal (RX300)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: On RX300, No. 1 throttle body, No. 2 throttle body and No. 1 air intake air control valve are removed as an assembly. See Fig 1. No. 1 air intake air control valve may also be referred to as No. 3 throttle body.

Disconnect negative battery cable. Drain cooling system. Remove engine cover. Disconnect throttle cable from throttle linkage. Disconnect PCV hose. Remove air cleaner hoses with resonator. Disconnect Throttle Position (TP) sensor. Disconnect Idle Air Control (IAC) valve connector. Disconnect water by-pass hose from intake manifold and from water inlet housing. Disconnect air assist hose. Disconnect fuel vapor hose from emission control valve set. Disconnect vacuum hoses as necessary. Remove throttle body and gasket.

Fig 1: Exploded View Of Throttle Body & Components (RX300)

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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.