OEM 2002 Toyota Sequoia Throttle Body

2002 Toyota Sequoia Throttle Body Parts Q&A

• Q: How to service and repair the throttle body on 2002 Toyota Sequoia?

  A: Service and repair processes for the throttle body start with removing the throttle body cover and draining the engine coolant before disconnecting the intake air connector. Service the throttle body by unplugging the accelerator cable from the throttle body before disconnecting the throttle position sensor connector and throttle control motor connector as well as the accelerator pedal position sensor connector and accelerator pedal position sensor wire from their clamps. The detachment process begins by eliminating the ventilation cap along with pcv hose and water bypass hose. Then proceed to unfasten the 2 bolts and 2 nuts to remove the throttle body from the intake manifold. Installation of the new throttle body requires connecting the water bypass hose to the manifold thermostat while placing a fresh gasket followed by tightening the 2 bolts and 2 nuts at a torque level of 18 N.m (185 kgf.cm, 13 ft.lbf). You should begin by reattaching the ventilation cap and then connect the water bypass hose with the pcv hose together. Afterward, reconnect the throttle position sensor with the throttle control motor and accelerator pedal position sensor connectors. Make sure the accelerator pedal position sensor wire stays in place through the clamps. After connecting the accelerator cable to the throttle body you need to reinstall the intake air connector and then add engine coolant before starting the engine. Inspect for any potential leakage as the last step will be to replace the throttle body cover. When replacing the throttle position sensor remove its connector along with two set screws then insert a new sensor that needs placement at a throttle opening angle of about 5.5 degrees. Position the sensor 15 degrees rightward from the designated spot before setting its value at the center point of standard throttle opening (14.4 - 16%) while securing screws with 2.0 N.m torque. The standard throttle valve opening percentage (10 - 14%) should be checked for correct maintenance. Validate that this percentage falls within the specified range when fully closed. Paint the two set screws along with turning off the ignition system before removing testing equipment. To replace the throttle control motor start by taking off the throttle position sensor then disconnect the motor connector before loosening the six screws which lets you remove the motor cover and assembly with washer. A new throttle control motor should be installed by placing the wave washer correctly while matching the pin holes then fastening it with three screws threaded to 3.4 N.m (35 kgf.cm, 30 in.lbf). Using sufficient grease on the gear teeth followed by washer installation will allow you to properly position the motor cover against throttle body before securing it with 6 screws at matched torque levels. To finish the repair you need to recouple the throttle control motor connector followed by reinstallation of the throttle position sensor. To replace the accelerator pedal position sensor you need to eliminate its three set screws before installation while positioning the throttle valve at 4 degrees open at the end. Tighten the 3 set screws to achieve 5.4 N.m tension (55 kgf.cm, 48 in.lbf) after you rotate the sensor to the left by 20 degrees. Before completing installation the operator should use a toyota hand-held tester or obdii scan tool to inspect the accelerator pedal position sensor by connecting its connector and verifying the accel pos #1 (VPA) voltage stays within 0.35 - 0.85 V normal range after installing the throttle body the system operation can be checked.