GF47.31-P-2100SM Component Description For the Activated Charcoal Filter Shutoff Valve

GF47.31-P-2100SM Component Description For The Activated Charcoal Filter Shutoff Valve
- ENGINE 113.986 in MODEL 215, 220
- with CODE (494) USA version
- ENGINE 113.987 in MODEL 209
- with CODE (494) USA version
- ENGINE 113.988 in MODEL 203
- with CODE (494) USA version up to Model Year 8
- ENGINE 113.989 in MODEL 171
- with CODE (494) USA version up to Model Year 8





Type 171
77 Activated charcoal canister
Y58/4 Activated charcoal filter shutoff valve

The activated charcoal filter shutoff valve is located on the activated charcoal canister, in front of the rear axle on the vehicle underbody.





Models 203, 209
77 Activated charcoal canister
Y58/4 Activated charcoal canister shutoff valve

The activated charcoal filter shutoff valve is located above on the activated charcoal canister, in the wheelhouse at the right rear.





Models 215, 220
77 Activated charcoal canister
Y58/4 Activated charcoal canister shutoff valve

The activated charcoal filter shutoff valve is located above on the activated charcoal canister, in the wheelhouse at the left rear.

Task
The activated charcoal filter shutoff valve closes off ventilation / venting of the activated charcoal canister to allow a leaktightness test on the fuel system (leak test).

Design
The activated charcoal filter shutoff valve consists of a solenoid which closes the activated charcoal filter shutoff valve when gases are flowing.
Additionally a mechanical safety valve is installed.

Function
The activated charcoal canister shutoff valve is actuated at the ground end by the ME control unit (N3/10) to conduct a leak test.
If the activated charcoal canister shutoff valve is faulty (the valve does not open anymore) then a mechanical safety valve takes over aeration of the activated charcoal canister (from about -25 mbar).