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NOTE:

To prevent deterioration, do not give a shock to the throttle position sensor and accelerator pedal position sensor.
Mixing of foreign objects may cause the gear to lock, so thoroughly check that there are no foreign objects stuck and remove if any.

REPLACE THROTTLE POSITION SENSOR
1. Remove the 2 set screws and throttle position sensor.
2. Reinstall a new throttle position sensor.
  1. Check that the opener opening angle of the throttle valve is about 4°.
    
    Fig 1: Identifying Throttle Position Sensor Screws
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Install the sensor to the place where it is rotated by 15° to the left from the specified installation position.
  3. Gradually turn the sensor counterclockwise until it touches the throttle valve shaft, and temporarily tighten the 2 set screws.
  Fig 2: Rotating Sensor 15° Left From The Specified Installation Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Adjust the throttle position sensor.
  1. Connect the throttle position sensor connector.
    NOTE: Do not connect the accelerator pedal position sensor connector.
  2. Connect a hand-held tester or OBD II scan tool 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 throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA, turn the throttle position sensor slowly to the left and right and set the sensor at the center of the standard value, and then tighten the screws.
    Standard throttle valve opening percentage:
    
    15.2 +/- 0.8 %
    
    Torque: 2.0 N.m (20 kgf.cm, 18 in.lbf)
    
    Fig 3: Turning Throttle Position Sensor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Recheck throttle valve opening percentage.
    If the throttle valve opening percentage is not as specified, repeat step (4).
  6. Perform an operation of the fully closed throttle valve by hand and check that the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA keeps the standard value.
  7. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / THROTTLE POS.
    Standard throttle valve opening percentage:
    
    10-14 %
    
    If the throttle valve opening percentage is not as specified, repeat steps (4) to (6).
  8. Paint the 2 set screws.
  9. Turn the ignition switch OFF.
  10. Disconnect the hand-held tester or OBD II scan tool from the DLC3.
  11. Disconnect the throttle position sensor connector.
REPLACE ACCELERATOR POSITION SENSOR
1. Remove the 4 bolts and sensor.
2. Reinstall the sensor with the 4 bolts.
  Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf)
3. Inspect the sensor.
  1. Connect the sensor connector.
  2. Connect the hand-held tester or OBD II scan tool to the DLC3.
  3. Turn the ignition switch ON.
    
    Fig 4: Identifying Sensor Bolts
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Throttle Body (SMT): Replacement

Use the Manual With the Right Hardware

When to See a Mechanic

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