Throttle Position Sensor: Testing and Inspection

THROTTLE POSITION (TP) SENSOR INSPECTION [L3 WITH TC]

NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. Description and Operation

Voltage Inspection

1. Verify that no DTC related to the APP sensor has been detected.

- If any DTCs related to the APP sensor have been detected, perform the DTC inspection.
(See DTC Table Engine.)

2. Start the engine and warm it up (ECT: more than 80°C {176 °F}).

3. Turn the ignition switch to the ON position (Engine off).

4. Verify that the PCM terminal 2AK and 2AL change smoothly while the throttle valve is gradually opened.

- If as verified, go to next step.
- If not as verified, perform the "Circuit Open/Short Inspection".

- If there is no open or short circuit, replace the throttle body.

5. Verify that the PCM terminal 2AK and 2AL voltages are as shown in the following table.






- If the voltage is not according to the following table, perform the "Circuit Open/Short Inspection".

- If there is no open or short circuit, replace the throttle body.
TP sensor output voltage









Circuit Open/Short Inspection









1. Disconnect the PCM connector. (See Service and Repair.)

2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)

Open circuit

- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

- Throttle body terminal A and PCM terminal 2AK
- Throttle body terminal B and PCM terminal 2AO
- Throttle body terminal C and PCM terminal 2AL
- Throttle body terminal D and PCM terminal 2AP

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the wiring harness.

- Throttle body terminal A and power supply
- Throttle body terminal A and body ground
- Throttle body terminal B and body ground
- Throttle body terminal C and power supply
- Throttle body terminal C and body ground
- Throttle body terminal D and power supply