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Throttle Body: Reassembly

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sienna, 2002 Toyota Sequoia, and 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. To install accelerator pedal position sensor, ensure throttle valve opening on throttle body is about 4 degrees. Install accelerator pedal position sensor on throttle body so it is at position No. 1 (20 degrees). See Fig 1.
  2. Rotate accelerator pedal position sensor clockwise to position No. 2 until it contacts throttle valve. See Fig 1. Install and tighten retaining screws to specification. See TORQUE SPECIFICATIONS .
    Fig 1: Installing Accelerator Pedal Position Sensor (Land Cruiser, Sequoia & Tundra 4.7L)
    G98I11914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. To check accelerator pedal position sensor operation after installation on throttle body, install electrical connector on accelerator pedal position sensor. Connect Toyota hand-held tester or scan tool to data link connector No. 3. See Fig 2-Fig 4 .
  4. Turn ignition on. DO NOT depress accelerator pedal or rotate accelerator pedal position sensor after turning ignition on. Using hand-held tester or scan tool, check that ACCEL POS#1 (VPA) voltage of the CURRENT DATA is.35-.85 volt. This is the standard accelerator pedal position sensor voltage. Turn ignition off. Disconnect electrical connector at accelerator pedal position sensor.
    5. CAUTION: When installing throttle control motor in throttle control motor cover, ensure holes on throttle control motor align with pins on throttle control motor cover.
  5. To install throttle control motor, install wave washer in throttle control motor cover. Install throttle control motor in throttle control motor cover so that holes on throttle control motor align with pins on throttle control motor cover. Ensure grommet around wire for throttle control motor engages throttle control motor cover. See Figure.
  6. Install and tighten throttle control motor-to-throttle control motor cover screws to specification. See TORQUE SPECIFICATIONS . Ensure all gears on throttle control motor and throttle body are clean. Apply thin coat of grease on entire surface of gear teeth.
    7. CAUTION: Ensure washer is installed on gear on throttle body before installing throttle control motor. See Figure.
  7. Install washer on gear on throttle body. See Figure. Install throttle control motor cover with throttle control motor on throttle body. Ensure holes on throttle control motor cover align with pins on throttle body.
  8. Install and tighten throttle control motor cover-to-throttle body retaining screws to specification. See TORQUE SPECIFICATIONS . Reinstall throttle control motor electrical connector on connector bracket. Go to next step and reinstall and adjust TP sensor.
  9. To install TP sensor, ensure throttle valve opening on throttle body is about 5.5 degrees. Install TP sensor on throttle body so it is at position No. 1 (15 degrees) and loosely install TP sensor retaining screws. See Fig 5. Rotate TP sensor counterclockwise to position No. 2 until it contacts throttle valve and slightly tighten TP sensor retaining screws. See Fig 5.
    10. NOTE: Ensure electrical connector is not installed on accelerator pedal position sensor when checking TP sensor adjustment.
  10. To check TP sensor adjustment after installation on throttle body, install electrical connector on TP sensor. Ensure electrical connector is NOT installed on accelerator pedal position sensor. Connect Toyota hand-held tester or scan tool to data link connector No. 3 at driver's side of instrument panel. See Fig 2-Fig 4 . Turn ignition on. DO NOT depress accelerator pedal or rotate accelerator pedal position sensor turning ignition on when adjusting TP sensor.
  11. Use hand-held tester or scan tool to read throttle valve opening which is displayed as a percentage. Throttle valve opening may be read by accessing THROTTLE POS under CURRENT DATA on hand-held tester or scan tool.
  12. While reading throttle valve opening, rotate TP sensor clockwise and counterclockwise until throttle valve opening is 15.2 percent, as this is the center of the standard throttle valve opening of 14.4-16.0 percent. Tighten TP sensor retaining screws to specification. See TORQUE SPECIFICATIONS . Recheck throttle valve opening reading after tightening TP sensor retaining screws, as this may cause the throttle valve opening to change. Ensure throttle valve opening remains at 15.2 percent after TP sensor retaining screws are tightened. Readjust TP sensor if necessary.
  13. Ensure throttle valve on throttle body is fully closed. Use hand-held tester or scan tool to read throttle valve opening again. With throttle valve fully closed, throttle valve opening should be 10-14 percent.
  14. If throttle valve opening is not within specification with throttle valve fully closed, repeat steps  11- 13 until correct throttle valve opening is obtained. Turn ignition off. Remove hand-held tester or scan tool. Disconnect electrical connector at TP sensor.
    Fig 2: Locating Data Link Connector No. 3 (Land Cruiser)
    G99G08773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Locating Data Link Connector No. 3 (Sequoia)
    G00015575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Locating Data Link Connector No. 3 (Tundra)
    G99C08035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Installing Throttle Position Sensor (Land Cruiser, Sequoia & Tundra 4.7L)
    G98J11915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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