2004 Toyota Avalon XLFACTORY OEM SERVICE PROCEDURE

Throttle Body: Replacement

NOTE:
  • Do not give a shock to the throttle position senor.
  • Do not disassemble or adjust the throttle opener.
  1. REPLACE THROTTLE POTION SENSOR 
    1. Remove the 2 screws and throttle position sensor.
      Fig 1: Removing Throttle Position Sensor
      G02878957Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reinstall a new throttle position sensor.
      1. Check that the throttle valve is fully close.
      2. Insert the sensor to the throttle body with it turned counterclockwise by 30° to 60° against the fully-close valve position.
      3. By turning the sensor clockwise, tighten the 2 screws.
    Fig 2: Installing Throttle Position Sensor
    G02878958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. REPLACE IAC VALVE 
    1. Remove the 4 screws, bracket, IAC valve and gasket.
    2. Place a new gasket on the No.1 throttle body.
    3. Reinstall a new IAC valve with the 4 screws and bracket.
    Fig 3: Removing IAC Valve
    G02878959Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REPLACE THROTTLE BODIES 
    1. Remove the 2 screws and protector.
      Fig 4: Removing Protector
      G02878960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 6 screws, No.1 throttle body, No.2 throttle body and 2 gaskets from the No.1 intake air control valve.
      Fig 5: Removing Throttle Body
      G02878961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Place 2 new gaskets and 2 new O-rings as shown in Fig 6 .
      Fig 6: Placing Gaskets And O-Rings
      G02878962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reinstall a new No.1 throttle body and No.2 throttle body with the 6 screws.

      Torque: 6.9 N.m (70 kgf.cm, 61 in.lbf) 

    Fig 7: Installing Throttle Body
    G02878963Courtesy 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.

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