mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Air Door Vacuum Solenoid Valve, HVAC|Description and Operation|Page 7178 > < Tightening Specifications|Page 7172
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Air Door Vacuum Solenoid Valve: Description and Operation

SWITCH OVER VALVE UNIT (Y11, 15-POINT):

Switchover Valve Unit (Y11, 15 Point)

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The 15 point switch over valve unit controls the air flap vacuum elements. In this first-ever application, the switchover valve unit is controlled by
serial data transmission via one circuit, also called multiplexing. A specific sequence of different voltage impulses are used to control the valves.
The electronic circuitry of the valve unit recognizes these voltage impulses and actuates the appropriate valve

Air Door Vacuum Solenoid Valve, HVAC|Description and Operation|Page 7178 > < Tightening Specifications|Page 7172