EGR VALVE INSPECTION [ZY]

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. Disconnect the negative battery cable.

2. Disconnect the EGR valve connector.

3. Measure the resistance between the EGR valve terminals.

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

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

Standard

Terminal	Resistance (ohm)
C-E C-A D-B D-F	12-16

Circuit Open/Short Inspection [ZY]

1. Disconnect the PCM connector. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [ZY].)

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 2O

- EGR valve terminal B and PCM terminal 2P

- EGR valve terminal C and PCM terminal 2BC

- EGR valve terminal D and PCM terminal 2BC

- EGR valve terminal E and PCM terminal 2K

- EGR valve terminal F and PCM terminal 2T

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

- EGR valve terminal A and body ground

- EGR valve terminal B and body ground

- EGR valve terminal E and body ground

- EGR valve terminal F and body ground