Throttle Body: Service and Repair

Throttle Body Part 1:

Throttle Body Part 2:

REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE AIR CLEANER ASSEMBLY




3. REMOVE THROTTLE BODY
a. Disconnect the throttle position sensor connector.
b. Disconnect the throttle control motor connector.
c. Disconnect the 2 PCV hoses from throttle body.




d. Disconnect the 2 water bypass hoses.




e. Remove the bolt, 2 nuts, accelerator bracket and throttle body from the intake manifold.

Torque: 20 N.m (204 kgf.cm, 15 ft.lbf)

f. Remove the throttle body gasket.

REPLACEMENT

NOTE:
- To prevent deterioration, do not shock the throttle position sensor.
- Mixing of the foreign objects may cause the gear locking, so thoroughly check that there is no stuck of any foreign objects and clean up if any.

REPLACE THROTTLE POSITION SENSOR




a. Remove the 2 set screws and throttle position sensor.
b. Reinstall the throttle position sensor.
1. Check that the throttle valve is under the condition of the opener opening angle (about 3.5 °).




2. Install the sensor to the place where is at 15 ° rotated to the right from the specified installation position.
3. Gradually turn sensor counterclockwise until it touches the throttle valve shaft and temporarily torque the 2 set screws.




c. Adjust the throttle position sensor.
1. Connect the throttle position sensor connector.

NOTE: At this time, do not connect the throttle control motor connector.

2. Connect the TOYOTA hand-held tester to the DLC3.
3. Turn the ignition switch ON.

NOTE: After turning the ignition switch ON, do not depress the accelerator pedal.

4. While reading the value of the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA, turn the throttle position sensor slowly to left and set the sensor at the center value of the standard value, and then torque the screws.

Torque: 1.7 N.m (17.5 kgf.cm, 15 in.lbf)

Standard throttle valve opening percentage: 14.8 ± 0.8%

NOTE: At the time of tightening the screw, as the sensor itself tends to turn causing to slanting, check that it is within the standard value after having finished the torque.

5. Fully close the throttle valve with a screwdriver and check that the value of the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA stays with the standard value.

Standard throttle valve opening percentage: 10-14%

If the throttle valve opening percentage is not as specified, repeat steps (4) through (5).

6. Paint the sensor set screws.
7. Turn the ignition switch OFF.
8. Disconnect the TOYOTA hand-held tester or from the DLC3.
9. Disconnect the throttle position sensor connector.

INSTALLATION
Installation is in the reverse order of removal.