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.




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 TABLE[LF, L3].) Diagnostic Trouble Code Descriptions

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. (See PCM INSPECTION[LF, L3].) PCM Inspection




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.

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 terminal2AK*1,2M*2
- Throttle body terminal B and PCM terminal 2AO*1,2K*2
- Throttle body terminal C and PCM terminal 2AL*\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