How to Service and Repair the Throttle Body on Toyota Tundra?

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The repair and servicing process of the throttle body requires users to remove the throttle body cover while draining engine coolant and disconnecting the intake air connector. The throttle body service requires disconnecting the accelerator cable from the throttle body first then removing the throttle body by cutting the connections of throttle position sensor connector, throttle control motor connector, accelerator pedal position sensor connector and accelerator pedal position sensor wire from their clamps. The task starts by disconnecting the PCV hose with the water bypass hose and then removing the ventilation cap while unfastening the two bolts and two nuts to detach the throttle body from the intake manifold. Finally, separate the water bypass hose from the manifold thermostat before removing the gasket. When installing the throttle position sensor maintain the sensor free of impact while inspecting it for all foreign objects. Connectors for the throttle position sensor must be cut before eliminating the two set screws to install the new sensor with a throttle valve orientation at 5.5 degrees. The sensor requires rotation to the right by 15 degrees before a slow counterclockwise adjustment to reach the throttle valve shaft. After temporary set screw tightening install the connector. Adjust the sensor position through a TOYOTA hand-held tester or OBDII scan tool until the throttle valve opens 14.4 - 16% and verify it remains within 10 - 14%. The 2 set screws must be painted before you turn off the ignition switch and remove the tester. To replace the throttle control motor start by disassembling the throttle position sensor followed by disconnecting the throttle control motor connector and then separating the throttle control motor cover, motor assembly with its washer. Mount a brand-new throttle control motor while placing the wave washer correctly and matching the pin holes before applying grease to the gear teeth. The process ends with placing back the throttle control motor cover and motor assembly followed by reconnecting the throttle control motor connector and reinstallation of the throttle position sensor. The new accelerator pedal position sensor installation begins with removing the sensor followed by sensor replacement after setting the throttle valve to an opening angle of about 4 degrees. Begin by rotating the sensor 20 degrees leftward before proceeding with clockwise motion to contact the throttle valve shaft while tightening the three set screws. Check the sensor voltage through the tester and verify it displays the normal range at 0.35 - 0.85 V. Position the water bypass hose to the manifold thermostat while using a new gasket and fasten the throttle body with 2 bolts and 2 nuts at 18 N.m (185 kgf.cm, 13 ft.lbf). After connecting all necessary components including water bypass hose and PCV hose as well as throttle position sensor connector and throttle control motor connector followed by accelerator pedal position sensor connector, secure the accelerator pedal position sensor wire to the clamps. The installation process requires connector of accelerator cable to throttle body followed by intake air connector installation before filling with engine coolant then checking for leaks by engine start followed by throttle body cover reinstallation.

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