EGR VALVE INSPECTION[L3]

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On-vehicle inspection

1.  Verify that the buzzing sound (valve operation sound) is heard from the EGR valve when cranking the engine.

•  If the buzzing sound is not heard, perform the “resistance inspection.”

Resistance inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the EGR valve connector.

3.  Measure the resistance between the EGR valve terminals.

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•  If within the specification, perform out the "Circuit Open/Short Inspection".

•  If not within the specification, replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION[L3].)

Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[L3].)

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

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Open circuit

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

―  EGR valve terminal A and PCM terminal 2AR

―  EGR valve terminal B and PCM terminal 2AY

―  EGR valve terminal C and main relay terminal A

―  EGR valve terminal D and main relay terminal A

―  EGR valve terminal E and PCM terminal 2AU

―  EGR valve terminal F and PCM terminal 2AV

Short circuit

•  If there is continuity, there is a short circuit. Repair or replace the wiring harness.

―  EGR valve terminal A and power supply

―  EGR valve terminal A and body ground

―  EGR valve terminal B and power supply

―  EGR valve terminal B and body ground

―  EGR valve terminal C and body ground

―  EGR valve terminal D and body ground

―  EGR valve terminal E and power supply

―  EGR valve terminal E and body ground

―  EGR valve terminal F and power supply

―  EGR valve terminal F and body ground