Sensor/Harness Testing

Throttle Position Sensor




The TP Sensor is a rotating type variable resistor that rotates with the throttle body throttle shaft to sense the throttle valve angle. As the throttle shaft rotates, the output voltage of the TP Sensor changes. The ECM detects the throttle valve opening based on voltage change.

NOTE: The TP Sensor signal is important in the control of the automatic transaxle. Shift shock and other trouble will occur if the sensor is faulty.

Using GST





HARNESS INSPECTION PROCEDURES














INSPECTION
1. Disconnect the throttle position sensor connector.



2. Measure resistance between terminal 1 (sensor ground) and terminal 4 (sensor power).

Standard value 3.5 - 6.5 k ohms

3. Connect a pointer type ohmmeter between terminal 1 (sensor ground) and terminal 3 (sensor output).
4. Operate the throttle valve slowly from the idle position to the full open position and check that the resistance changes smoothly in proportion to the throttle valve opening angle.




5. If the resistance is out of specification, or fails to change smoothly, replace the throttle position sensor.

TP Sensor torque: 1.5 - 2.5 Nm (1.1 - 1.8 ft.lbs.)

6. Disconnected the idle position switch connector
7. Check the continuity between terminal 1 and sensor ground