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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1 (ENGINE CONTROLS - REMOVAL, OVERHAUL, INSTALLATION)FUEL SYSTEMTHROTTLE BODYDISASSEMBLY
2004 Toyota Matrix XR, FWD, Standard

Throttle Body: Disassembly

2004 Toyota Matrix XR, FWD, StandardSECTION Disassembly
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.
  1. If necessary to remove Throttle Position (TP) sensor, remove TP sensor retaining screws and TP sensor from throttle body. See Figure.
  2. If necessary to remove Idle Air Control (IAC) valve, remove IAC valve retaining screws, bracket, IAC valve and gasket. If necessary to replace throttle bodies, remove protector, clip and plate washer. Disconnect accelerator link. Remove 6 throttle body retaining screws, No. 1 throttle body, No. 2 throttle body and 2 gaskets from No. 1 intake air control valve.


  1. If necessary to remove Throttle Position (TP) sensor, remove retaining screws and TP sensor from throttle body. See Fig 1.
  2. If necessary to remove throttle control motor, ensure Throttle Position (TP) sensor is removed from throttle body. Disconnect electrical connector for throttle control motor from wiring bracket. See Fig 1. Remove retaining screws and cover to access throttle control motor. Remove retaining screws and throttle control motor from throttle body.
  3. If necessary to remove accelerator pedal position sensor, using small screwdriver, bend tabs on washer plate away from retaining screws for accelerator pedal position sensor. See Fig 1. Remove retaining screws, washer plate and accelerator pedal position sensor from throttle body.
Fig 1: Exploded View Of Throttle Body & Components (GS300 & SC300)
G98I11906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. If necessary to remove Throttle Position (TP) sensor, remove TP sensor retaining screws and TP sensor from throttle body. See Fig 1.
  2. If necessary to remove throttle control motor, ensure TP sensor is removed from throttle body. Disconnect throttle control motor electrical connector from connector bracket. See Fig 1.
  3. Remove throttle control motor cover-to-throttle body retaining screws from outside of throttle control motor cover. Remove throttle control motor cover with throttle control motor from throttle body.
  4. Remove throttle control motor-to-throttle control motor cover screws from inside of throttle control motor cover. Remove throttle control motor and wave washer from throttle control motor cover.
  5. If necessary to remove accelerator pedal position sensor, remove retaining screws and accelerator pedal position sensor from throttle body. See Fig 1.
Fig 1: Exploded View Of Throttle Body & Components (GS400, LS400, LX470 & SC400)
G99E50553Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.