EGR Solenoid Vacuum Valve Assembly

The resistance of each solenoid should be 32-64 ohms. Replace any solenoid which is not in this resistance range. The vent valve should allow flow when the solenoid is de-energized.
The control valve should allow flow when the solenoid is energized. The valves may have a very small leakage rate during testing.

Fig 1: Solenoid Flow Diagram

EGR Valve Position Sensor (EVP)

NOTE: For EVP sensor testing procedures, see appropriate article in the COMPUTERIZED ENGINE CONTROLS section.

With the solenoid disconnected, check the resistance between the solenoid terminals. Resistance should be 51-108 ohms. Replace solenoid if not to specification. Ports should allow flow of air when solenoid is energized. Operational signal for solenoid is supplied by the ECA.