EGR Valve: Testing and 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" is failed, inspect the vacuum hoses for improper routing, kinks or leakage, and carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection
1. Remove the PCM.




2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.

Tightening torque:
7.9 - 10.7 N.m (80 - 110 kgf.cm, 69.5 - 95.4 in.lbf}




4. Inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.

Open circuit
- GND circuit (EGR valve connector terminal E and PCM connector terminal 68)
- GND circuit (EGR valve connector terminal A and PCM connector terminal 72)
- GND circuit (EGR valve connector terminal B and PCM connector terminal 46)
- GND circuit (EGR valve connector terminal F and PCM connector terminal 56)
- Power circuit (EGR valve connector terminal C or D and main relay connector terminal D through common connector)

Short circuit
- EGR valve connector terminal E and PCM connector terminal 68 to GND
- EGR valve connector terminal A and PCM connector terminal 72 to GND
- EGR valve connector terminal B and PCM connector terminal 46 to GND
- EGR valve connector terminal F and PCM connector terminal 56 to GND

5. Remove the EGR valve, and inspect for any damage or clogging. Replace the EGR valve if not as specified.
6. Connect the negative battery cable.