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Throttle Position (TP) Sensor Inspection

THROTTLE POSITION (TP) SENSOR INSPECTION

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 (P1577, 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. (See FOREWORD.) Foreword

Voltage Inspection
1. Turn the ignition switch to the ON position.
2. Verify that the voltage at PCM terminals 1J (M-MDS PID: TP1) and 1M (M-MDS PID: TP2) increases while gradually increasing the accelerator pedal opening angle according to the accelerator pedal opening angle.
- If it can be verified, go to the next step.
- If it cannot be verified even though the related wiring harnesses have no malfunction, replace the throttle body.

3. Verify that the voltage at PCM terminals 1J (M-MDS PID: TP1) and 1M (M-MIX PID: TP2) is as indicated in the table.

TP Sensor Output Voltage:




- If it cannot be verified, 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 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 C and PCM terminal 2F
- Throttle body terminal D and PCM terminal 1M
- Throttle body terminal E and PCM terminal 1Q
- Throttle body terminal F and PCM terminal *J

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 E and body ground
- Throttle body terminal E and power supply
- Throttle body terminal F and body ground
- Throttle body terminal F and power supply
- Throttle body terminal D and body ground
- Throttle body terminal D and power supply
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