CLK 550 (209.372) V8-5.5L (273.967) (2008)
Canister Purge Control Valve: Description and Operation
GF47.31-P-2100VU Component Description For the Activated Charcoal Filter Shutoff Valve
GF47.31-P-2100VU Component Description For The Activated Charcoal Filter Shutoff Valve
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with CODE (494) USA version
Location
The activated charcoal filter shutoff valve is located at the activated charcoal canister vent connection.
Task
Open ventilation of the activated charcoal canister or close for leak test of regeneration system.
Design
Solenoid which opens the valve when energized. Coil resistance around 15 Ohms, 2-pole plug connection. A mechanical safety valve is also installed.
Function
When ignition ON, the valve is actuated by the motor electronics control unit at the ground end and opens. The voltage supply is performed by terminal
87. If the closed valve jams, a safety valve opens as of approx. -25 mbar and ventilates the fuel tank.