EGR Valve: Testing and Inspection

On-vehicle Inspection
1. Carry out the "EGR Control Inspection".
- If not as specified, perform the following inspection of the EGR valve.

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 but the "EGR Control Inspection" failed, inspect the vacuum hoses for improper routing, kinks or leakage, and inspect "Circuit Open/Short Inspection".

Circuit Open/Short Inspection
1. Disconnect the PCM connector.




2. Connect the SST (104 Pin Breakout Box) with the PCM disconnected.
3. Tighten the connector attaching bolt.

Tightening torque
7.9 - 10.7 N.m {80 - 110 kgf.cm, 89.5 - 95.4 in.lbf}

4. Inspect the following wiring harness for open or short (Continuity check).

Open circuit
- If there is no continuity, the circuit is open. Repair or replace the harness.
- EGR valve terminal E (harness-side) and 104 pin breakout box terminal 68
- EGR valve terminal A (harness-side) and 104 pin breakout box terminal 72
- EGR valve terminal B (harness-side) and 104 pin breakout box terminal 46
- EGR valve terminal F (harness-side) and 104 pin breakout box terminal 56
- EGR valve terminal C (harness-side) and main relay terminal D (harness-side)
- EGR valve terminal D (harness-side) and main relay terminal D (harness-side)

Short circuit




- If there is continuity, the circuit is shorted. Repair or replace the harness.
- EGR valve terminal E (harness-side) and body ground
- EGR valve terminal A (harness-side) and body ground
- EGR valve terminal B (harness-side) and body ground
- EGR valve terminal F (harness-side) and body ground

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