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 BODYREASSEMBLY (ES300)
2004 Toyota Matrix XR, FWD, Standard
Reassembly (ES300)
2004 Toyota Matrix XR, FWD, StandardSECTION Reassembly (ES300)
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.
- To install throttle position sensor, ensure throttle valve is under condition of opener opening angle (about 6 degrees). Install sensor to position where it is 20-30 degrees rotated to right from its installation position. See Fig 1. Gradually turn sensor counterclockwise until it touches throttle valve shaft and temporarily tighten 2 set screws. See Fig 2.
- Connect throttle position sensor connector. Connect OBD-II scan tool to DLC3. Turn ignition on. DO NOT depress accelerator pedal. While reading throttle valve opening percentage, turn throttle position sensor slowly to left and right and set sensor at center value of standard value of 16-17.6 percent. See Fig 2. Recheck throttle valve opening percentage. If throttle valve opening percentage is not to specification, repeat this step. If throttle valve opening percentage is to specification, go to next step.
- Operate fully closed throttle valve by hand and check that throttle valve opening percentage of CURRENT DATA on scan tool stays within standard value of 10-14 percent. If opening percentage is not as specified, repeat step 2. If opening percentage is to specification, apply paint on 2 set screws. Turn ignition off. Disconnect scan tool. Disconnect throttle position sensor connector.
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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.