This is a normally closed solenoid that when energized by the ECA (electronic control assemble) it causes a vacuum to flow to the EGR valve. When it is deenergized the vacuum is stopped and the EGR valve is closed.
TESTING THE EGR SOLENOID
The resistance of each solenoid should be 68-78 ohms. If not replace the solenoid. It should flow air (vacuum) when energized. They are expected to have some small leakage when energized or not. This is normal and acceptable.
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