Throttle Position Sensor: Testing and Inspection

THROTTLE POSITION (TP) SENSOR INSPECTION [LF, L3]

CAUTION:
- This inspection procedure cannot be completed correctly if the accelerator pedal position sensor has a malfunction. Before performing this procedure, verify that any one of the DTCs (P2122, P2123, P2127, P2128, P2138) related to the accelerator pedal position sensor is not detected.

NOTE:
- Before performing the following inspection, make sure to follow the troubleshooting flowchart. Foreword

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. DTC Table Engine

2. Connect the M-MDS to the DLC-2.






3. Turn the ignition switch to ON position.

4. Select TP1 or TP2 PID (percentage) on the M-MDS.

5. Verify that the TP1 or TP2 PID is within the specification when the accelerator pedal not depressed. Component Tests and General Diagnostics

6. Operate the accelerator pedal and verify that the TP1 or TP2 PID (percentage) changes as shown in the following graph.

- If not verified, perform the "Circuit Open/Short Inspection".

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






Circuit Open/Short Inspection

1. Disconnect the PCM connector.

2. Disconnect the throttle body connector.

3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)











Open circuit

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

- Throttle body terminal A and PCM terminal 2AK*1, 2M*2
- Throttle body terminal B and PCM terminal 2AO*1, 2K*2
- Throttle body terminal C and PCM terminal 2AL*1, 2I*2
- Throttle body terminal D and PCM terminal 2AP*1, 2O*2

Short circuit

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

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

*1
California emission regulation applicable model and except for California emission regulation applicable model with LF MTX, L3
*2
Except for California emission regulation applicable model with LF ATX