EGR Valve: Testing and Inspection

EGR VALVE INSPECTION

Resistance Inspection

NOTE: Perform the following test only when directed.

1. Disconnect the negative battery cable.










2. Inspect resistance of the EGR valve coils.
- If not as specified, replace the EGR valve.
- If as specified, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection






1. Disconnect the PCM connector.
2. Inspect the following wiring harness 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 E and PCM terminal 2Q
- EGR valve terminal A and PCM terminal 2R
- EGR valve terminal B and PCM terminal 2S
- EGR valve terminal F and PCM terminal 2O
- EGR valve terminal C or D and main relay terminal C

Short circuit

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

3. Remove the EGR valve, and inspect for any damage or clogging.
- If there is no damage or no clogging, replace the EGR valve.