Throttle Body: Installation

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If throttle body or Idle Air Control (IAC) valve is replaced, or if throttle body or IAC valve is removed and reinstalled, throttle body lever adjustment procedure must be performed.

If installing TP sensor on No. 1 throttle body, ensure throttle valve on No. 1 throttle body is fully closed.
Install TP sensor on No. 1 throttle body with TP sensor rotated counterclockwise 30-60 degrees against fully closed position. See Fig 2.
Rotate TP sensor clockwise and then install and tighten retaining screws to specification (if available). See TORQUE SPECIFICATIONS .
Using NEW gasket, reinstall IAC valve. Tighten IAC valve bolts to specification (if available). See Fig 3. See TORQUE SPECIFICATIONS .
To install throttle bodies, reverse removal procedure using NEW gaskets and "O" rings. Tighten throttle body-to-No. 1 intake air control valve bolts and No. 1 intake air control valve-to-air intake chamber nuts to specification. See TORQUE SPECIFICATIONS .
Fill cooling system.
Perform throttle body lever adjustment procedure. See THROTTLE BODY LEVER ADJUSTMENT .

Fig 1: Locating Throttle Bodies & Components (Avalon, Highlander & Sienna)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Installing Throttle Position Sensor (Avalon, Highlander & Sienna)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Locating Intake Air Control Valve (Avalon, Highlander & Sienna)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

To install throttle body, reverse removal procedure using NEW gasket. Tighten throttle body bolts/nuts and suspension upper brace nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.

To install, reverse removal procedure using NEW gasket. Tighten throttle body bolts/nuts and suspension upper brace nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.

To install, reverse removal procedure using NEW gasket. Tighten throttle body bolts/nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.

To install, reverse removal procedure using NEW gasket. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.

To install, reverse removal procedure using NEW gasket. Ensure gasket is installed with protrusion facing upward. See Fig 1. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.

Fig 1: Installing Gasket For Throttle Body (Tacoma & Tundra 3.4L)

To install, reverse removal procedure using NEW gasket. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.