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. (Refer to ACCELERATOR CABLE INSPECTION/ADJUSTMENT.)
Testing and Inspection




3. Measure the resistance between TP sensor terminals A and C using an ohmmeter.

Specification: 2.5 - 6 kOhm

- If not as specified, replace the TP sensor.

- If as specified, but PID value or PCM terminal 89 voltage are out of specification, inspect the following:
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 Nm (80 - 110 kg.cm, 69.5 - 95.4 in.lb)

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
- Reference voltage circuit (TP sensor connector terminal C and PCM connector terminal 90)
- TP signal circuit (TP sensor connector terminal B and PCM connector terminal 89)




- Ground circuit (TP sensor connector terminal A and PCM connector terminal 91)

Short circuit
- Reference voltage circuit (TP sensor connector terminal C and PCM connector terminal 90 to Ground)
- TP signal circuit (TP sensor connector terminal B and PCM connector terminal 89 to Ground)

4. Reconnect the TP sensor connector.