EGR Valve: Testing and Inspection

EGR VALVE INSPECTION [LF, L3]

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 EGR valve connector. Service and Repair

2. 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. Service and Repair
Standard





Circuit Open/Short Inspection

1. Disconnect the PCM connector. Service and Repair

2. Inspect the following 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*1, 2AR*2
- EGR valve terminal B and PCM terminal 2L*1, 2AY*2
- EGR valve terminal E and PCM terminal 2K*1, 2AU*2
- EGR valve terminal F and PCM terminal 2H*1, 2AV*2
- EGR valve terminal C and main relay terminal A
- EGR valve terminal D and main relay terminal A

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 B and body ground
- EGR valve terminal E and body ground
- EGR valve terminal F and body ground

*1
California emission regulation applicable model and except for California emission regulation applicable model with LF MTX, L3
*2
Except for California emission regulation applicable model with LF ATX