THROTTLE POSITION (TP) SENSOR INSPECTION[AJ (3.0L Duratec)]

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Note

•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See ENGINE SYMPTOM TROUBLESHOOTING[AJ (3.0L Duratec)].)

Resistance Inspection

1.  Inspect for the following:

•  Throttle valve closed status

•  Accelerator cable play

2.  Disconnect the TP sensor connector.

3.  Verify that the resistance between TP sensor terminals 1 and 2 changes moderately corresponding to the throttle valve opening angle.

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•  If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification, perform the “Circuit Open/Short Inspection”.

•  If there is any malfunction, replace the throttle body. (See THROTTLE BODY REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

2.  Inspect the following wiring harness for open or short (continuity check).

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Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the harness.

―  TP sensor terminal A and PCM terminal 91

―  TP sensor terminal B and PCM terminal 89

―  TP sensor terminal C and PCM terminal 90

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the harness.

―  TP sensor terminal A and power supply

―  TP sensor terminal B and body ground

―  TP sensor terminal B and power supply

―  TP sensor terminal C and body ground