Throttle Position Sensor: Testing and Inspection

NOTE: The TP sensor on this type of vehicle is a maintenance-free type. Perform the following test only when directed.

Resistance Inspection
1. Verify that the throttle valve is at CTP.
2. Inspect accelerator cable free play.




3. Measure the resistance between TP sensor terminals A and C using an ohmmeter.
- If not as specified, replace the TP sensor.
- If as specified, but PID value or PCM terminal 89 voltage are out of specification, carry out the "Circuit Open/Short Inspection".

Specification: 2.5 - 6 kOhms

Circuit Open/Short Inspection
1. Remove the PCM.




2. Connect the SST(104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.

Tightening torque
7.9 - 10.7 N.m {80 - 110 kgf.cm, 69.5 - 95.4 in.lbf}




4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
- If there is an open or short circuit, repair or replace wiring harnesses.
- If there is no open or short circuit, replace the TP sensor.

Open circuit
- Constant voltage circuit (TP sensor connector terminal A and PCM connector terminal 90)
- TP signal circuit (TP sensor connector terminal C and PCM connector terminal 89)
- GND circuit (TP sensor connector terminal B and PCM connector terminal 91)

Short circuit
- Constant voltage circuit (TP sensor connector terminal A and PCM connector terminal 90 to GND)
- TP signal circuit (TP sensor connector terminal C and PCM connector terminal 89 to GND)

5. Reconnect the TP sensor connector.