EGR Valve: Testing and Inspection

EGR VALVE INSPECTION [LF]

NOTE: Perform the following procedure only when directed.

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 plug hole plate.
2. Disconnect the battery cover.
3. Disconnect the negative battery cable.
4. Disconnect the EGR valve connector.







5. 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.

Circuit Open/Short Inspection

1. Disconnect the PCM connector.




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

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 2G
- EGR valve terminal B and PCM terminal 2L
- EGR valve terminal E and PCM terminal 2K
- EGR valve terminal F and PCM terminal 2H
- EGR valve terminal C and main relay
- EGR valve terminal D and main relay

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- EGR valve terminal A and body ground
- EGR valve terminal A and power supply
- EGR valve terminal B and body ground
- EGR valve terminal B and power supply
- EGR valve terminal C and body ground
- EGR valve terminal D and body ground
- EGR valve terminal E and body ground
- EGR valve terminal E and power supply
- EGR valve terminal F and body ground
- EGR valve terminal F and power supply