EGR Valve: Testing and 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, inspect the vacuum hoses for improper routing, kinks or leakage, and carry out the "Circuit Open/Short Inspection" and repair or replace the parts if necessary.

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