Throttle Position Sensor: Adjustments

CAUTION: The Throttle Position Sensor is adjusted at the factory before shipment. Unnecessary adjustment will negatively effect the engine performance. Adjusting the throttle position sensor by using the Throttle Adjusting Screw (TAS) will negatively effect the engine performance.




Using the Engine Signal Monitor
1. Connect the Special Service Tools (Engine Signal Monitor) to the PCM.
2. Verify that the throttle valve is at the closed throttle position.
3. Loosen the attaching screws.
4. Turn the ignition switch to ON.




5. Adjust the throttle position sensor so that the PCM terminal 3F voltage is as specified. Verify that the voltage increase is directly proportioned to the throttle valve opening angle.

Specifications: Closed throttle: 0.1-1.1 V
Wide open throttle: 3.0-4.6 V

6. Tighten the attaching screws.

Tightening torque: 1.6-2.3 Nm (14-20 in.lbs.)

7. If not adjusted, inspect the throttle position sensor harness.
8. If the harness is OK, replace the Throttle Position Sensor.




Using the New Generation Star Tester
1. Connect the Special Service Tools New Generation Star (NGS) tester to the data link connector-2.




2. Select the PID/DATA MONITOR AND RECORD function of the NGS.
3. Verify that the throttle valve is at the closed throttle position.
4. Loosen the attaching screws.
5. Select the "TP V" on the NGS display. The NGS measures and shows the voltage. Verify that the voltage increase is directly proportioned to the throttle valve opening angle.

Specifications: Closed throttle: 0.1-1.1 V
Wide open throttle: 3.0-4.6 V

6. Tighten the attaching screws.

Tightening torque: 1.6-2.3 Nm (14-20 in.lbs.)

7. If not adjusted, inspect the throttle position sensor harness.
8. If the harness is OK, replace the Throttle Position Sensor.