Throttle Position (TP) Sensor Inspection

THROTTLE POSITION (TP) SENSOR INSPECTION

NOTE: Perform the following inspection only when directed.

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. Diagnostic Trouble Code Descriptions)




2. Connect the WDS or equivalent to the DLC-2.
3. Turn the ignition switch to ON position.




4. Select TP1 or TP2 PID (percentage) on the WDS or equivalent.
5. Verify that the TP1 or TP2 PID (percentage) changes smoothly while throttle valve is gradually opened.
- If as verified, go to next step.
- If not as verified, perform the "Circuit Open/Short Inspection".




6. Verify that the TP1 or TP2 PID (percentage) is as indicated in the table given according to the condition of the throttle valve.
- If as verified, perform the "Circuit Open/Short Inspection".
- If not as verified, replace the throttle body. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)

Circuit Open/Short Inspection

1. Disconnect the PCM connector.




2. Inspect the following harness for open or short circuit. (Continuity check)

Open circuit

- Throttle body terminal C (harness-side) and PCM terminal 63 (harness-side)
- Throttle body terminal D (harness-side) and PCM terminal 20 (harness-side)
- Throttle body terminal E (harness-side) and PCM terminal 36 (harness-side)
- Throttle body terminal F (harness-side) and PCM terminal 89 (harness-side)

Short circuit

- 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
- Throttle body terminal D (harness-side) and body GND
- Throttle body terminal E (harness-side) and power supply
- Throttle body terminal F (harness-side) and power supply
- Throttle body terminal F (harness-side) and body GND