EGR Valve: Testing and Inspection

EGR VALVE INSPECTION [L3 WITH TC]

Resistance Inspection

1. Disconnect the negative battery cable.

2. Inspect resistance of the EGR valve coils.

- If not as specified, replace the EGR valve. (See Service and Repair)
- If as specified, carry out the "Circuit Open/Short Inspection".









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 2AM
- EGR valve terminal B and PCM terminal 2AR
- EGR valve terminal C or D and main relay terminal A (Canada specs.)
- EGR valve terminal C or D and main relay terminal C (Except Canada specs.)
- EGR valve terminal E and PCM terminal 2AQ
- EGR valve terminal F and PCM terminal 2AN

Short circuit
- If there is continuity, there is a short circuit. 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 or 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

3. Remove the EGR valve, and inspect for any damage or clogging.

- If there is no damage or clogging, replace the EGR valve. (See Service and Repair)