EGR VALVE INSPECTION[LF, L3]

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On-vehicle Inspection

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

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

Resistance Inspection

1.  Remove the battery cover (See BATTERY REMOVAL/INSTALLATION[LF, L3].)

2.  Disconnect the negative battery cable.

3.  Disconnect the EGR valve connector.

4.  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[LF, L3].)

Circuit Open/Short Inspection

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

2.  Inspect the following wiring harnesses for an open or short circuit (continuity check).

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Open circuit

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

―  EGR valve terminal A and PCM terminal 2G^*1, 2AR^*2

―  EGR valve terminal B and PCM terminal 2L^*1, 2AY^*2

―  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 2K^*1, 2AU^*2

―  EGR valve terminal F and PCM terminal 2H^*1, 2AV^*2

Short circuit

•  If there is continuity, the circuit is short. 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