Throttle Position Sensor: Testing and Inspection

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

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. Diagnostic Trouble Code Descriptions

2. Start the engine and warm it up (ECT: more than 80 degree C {176 degree F}).
3 Turn the ignition switch to the ON position (Engine off).
4. Verify that the PCM terminal 3J and 3M 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 3J and 3M voltages are as shown in the following table.
- If voltage is not as 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.




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 3M
- Throttle body terminal B and PCM terminal 3P
- Throttle body terminal C and PCM terminal 3J
- Throttle body terminal D and PCM terminal 3Q

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 power supply
- 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