E 320 4MATIC Wagon (210.282) V6-3.2L (112.941) (1998)
Air Diverter Solenoid: Description and Operation
Air Pump Switchover Valve, Function
Air Pump Switchover Valve, Function
1
Air admission
2
Vacuum supply from intake manifold
3
Connection to aspirator shutoff valve
a
Armature plate
b
Restoring spring
c
Housing
d
Solenoid (coil)
e
Electrical connection
f
Rubber seal
When actuating, the anchor plate (a) is pulled by the solenoid (d) and the sealing rubber (f) closes the aeration. The connection between port 2 and port 3
is opened. So that the vacuum from the intake manifold is built up to the aspirator shutoff valve. In the de-energized state the connection between port 1
and port 3 is re-established and air is thus admitted to port 3.