•  EGR control solenoid valve consists of coil, spring, and plunger.

•  When EGR valve is not energized, the passage between the diaphragm and atmospheric air side is open.

•  When specified conditions are satisfied, the solenoid coils become energized and electromagnetic, and then pull the plunger. At this time, the passage between the diaphragm and atmospheric air side is closed and the passage between the diaphragm and vacuum pump side is opened.