EGR VALVE INSPECTION [WITH WU-TWC]

On-vehicle Inspection

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

• 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.

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

• If it is not within the specification, replace the EGR valve.

Standard

Terminal	Resistance (ohm)
C-E C-A D-B D-F	20-24

Circuit Open/Short Inspection

1. Disconnect the PCM connector.

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

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

- EGR valve terminal A and PCM terminal 2V

- EGR valve terminal B and PCM terminal 2R

- EGR valve terminal C and PCM terminal 2T

- EGR valve terminal D and PCM terminal 2T

- EGR valve terminal E and PCM terminal 2Z

- EGR valve terminal F and PCM terminal 2N

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

- EGR valve terminal A and body GND

- EGR valve terminal B and body GND

- EGR valve terminal E and body GND

- EGR valve terminal F and body GND