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. (See PCM REMOVAL/INSTALLATION.)




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

Tightening torque: 3.0 - 5.4 N.m {30 - 56 kgf.cm, 27 - 48 in.lbf}




4. Inspect the 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 12
- 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 or 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 GND
- EGR valve terminal A (harness-side) and GND
- EGR valve terminal B (harness-side) and GND
- EGR valve terminal F (harness-side) and GND
- EGR valve terminal C or D (harness-side) and power supply

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