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Throttle Position Sensor: Testing and Inspection

THROTTLE POSITION (TP) SENSOR INSPECTION

NOTE: Perform the following inspection only when directed.

Voltage Inspection
1. Verify that no DTC related to APP sensor has been detected.
- If any DTCs related to APP sensor have been detected, perform the DTC inspection. (See DTC TABLE)

2. Start the engine and warm it up (ECT: more than 80 °C {176 °F}.
3. Turn the ignition switch to ON position (Engine OFF).
4. Verify that the PCM terminal 3M and 3J change smoothly while 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 3M and 3J voltages are as shown in the given table.
- If voltage is not as given table, perform the "Circuit Open/Short Inspection".
- If there is no open or short circuit, replace the throttle body.

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)




2. Inspect the following wiring harnesses for 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 (harness-side) and PCM terminal 3M (harness-side).
- Throttle body terminal B (harness-side) and PCM terminal 3N (harness-side).
- Throttle body terminal C (harness-side) and PCM terminal 3J (harness-side).
- Throttle body terminal D (harness-side) and PCM terminal 3K (harness-side).

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- Throttle body terminal A (harness-side) and power supply.
- Throttle body terminal A (harness-side) and body GND.
- Throttle body terminal B (harness-side) and power supply.
- Throttle body terminal B (harness-side) and body GND.
- Throttle body terminal C (harness-side) and power supply.
- Throttle body terminal C (harness-side) and body GND.
- Throttle body terminal D (harness-side) and power supply.
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