Throttle Position Sensor: Testing and Inspection

THROTTLE POSITION (TP) SENSOR
The TP Sensor is a variable resistor type 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.

Circuit Diagram:

SENSOR CHECKING

Using HI-Scan:

Using voltmeter
1. Disconnect the throttle position sensor connector.
2. Measure resistance between terminal 3 (sensor ground) and terminal 2 (sensor power) for 2.4 DOHC, between terminal 2 (sensor ground) and terminal 3 (sensor power) for V6.

Standard value
2.4 DOHC 3.5 - 6.5 Kohms
V6 1.6 - 2.4 Kohms

3. Connect a pointer type ohmmeter between terminal 3 (sensor ground) and terminal 1 (sensor output) for 2.4 DOHC and between terminal 2 (sensor ground) and terminal 1 (sensor output) for V6.
4. Operate the throttle valve slowly from the idle position to the full open position and check that the resistance changes smoothly in proportion with the throttle valve opening angle.
5. If the resistance is out of specification, or fails to change smoothly, replace the throttle position sensor.

Tightening torque
TP Sensor 1.5 - 2.5 N.m (15 - 25 kg.cm, 1.1 - 1.8 lb.ft)

Harness Inspection:

TROUBLESHOOTING HINTS
The TPS signal is important in the control of the automatic transaxle. Shift shock and other trouble will occur if the sensor is faulty.