Toyota 22030-21020
Throttle Body

Service and repair operations for the throttle body begin with draining engine coolant followed by air cleaner assembly removal. Remove the connections of the throttle position sensor and throttle control motor together with the two PCV hoses and two water bypass hoses. Unfasten the bolt along with two nuts then discard the accelerator bracket and throttle body from the intake manifold at a torque level of 20 N.m (204 kgf.cm, 15 ft.lbf). The gasket of the throttle body needs removal during this process. The throttle position sensor should be handled gently before installation by the technician to extend its lifespan and prevent unexpected gear locking. Reinstall the throttle position sensor by inspecting the throttle valve opening angle at 3.5 deggrees. Position the sensor 15 degrees right of position in the specifications before rotating it counter-clockwise to reach the throttle valve shaft point then torque the set screws together temporarily at 1.7 N.m (17.5 kgf.cm, 15 in.lbf). Use the TOYOTA hand-held tester at DLC3 to adjust the throttle position sensor by connecting its connector and turning the ignition switch ON while avoiding depressing the accelerator pedal. Watch the throttle valve opening percentage value under CURRENT DATA while adjusting the throttle position sensor position until the measurement reaches the center of the standard range at 14.8 plus or minus 0.8. The sensor must stay within the standard value after you torque down the screws. Check the throttle valve opening percentage using a screwdriver until the percentage stays within 10-14% of the standard value. The adjustment procedure should be repeated until the measurement stays within standard. After setting the sensor screws with paint, switch OFF the ignition and remove both the TOYOTA tester from DLC3 socket while also removing the throttle position sensor connector. The steps for installation should be performed in the opposite order of what was used for removal.

Begin by removing the 6 clips to take off the radiator support opening cover, followed by the engine under cover LH.

Remove the bolt, 2 nuts, and throttle with motor body, and take out the gasket from the intake manifold.

Disconnect the ventilation hose, No. 2 ventilation hose, No. 1 fuel vapor feed hose, water by-pass hose, No. 2 water by-pass hose, throttle control motor connector, and throttle position sensor connector.

Disconnect the MAF meter connector, the wire harness from the wire harness clamp, loosen the hose clamp bolt to disconnect the No. 1 air cleaner inlet, remove the 2 bolts, and loosen the hose clamp bolt to take off the air cleaner.

Install the air cleaner assembly with the 2 bolts at a torque of 7.0 N.m (71 kgf.cm, 62 in.lbf), tighten the hose clamp bolts at 3.0 N.m (31 kgf.cm, 27 in.lbf), and reconnect the MAF meter connector.

Begin by draining the engine coolant and removing the air cleaner assembly.

The standard throttle valve opening percentage should be 14.8 ± 0.8%.