EGR Control Solenoid Valve Inspection

Fig. 37 Connecting A Vacuum Pump To The EGR Control Solenoid Valve:

1. Mark and then disconnect the vacuum hoses (yellow and green stripe) from the solenoid valve.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to the nipple the green striped hose was removed from.

Fig. 38 Testing Operation Of The EGR Control Solenoid Valve:

4. Apply vacuum to the valve and verify that when 12 VDC is applied to the solenoid the vacuum holds.
5. Remove 12 VDC from the solenoid and verify that vacuum leaks through the valve.

Fig. 39 Testing The EGR Control Solenoid Valve Coil Resistance:

6. Measure the resistance of the solenoid coil and verify that the resistance falls between 36 and 44 Ohms at 20 degrees C or 68 degrees F.