VW Golf manuals

Volkswagen Golf Service & Repair Manual: Connection diagram - activated charcoal filter

Fuel tank leak detection takes advantage of the fact that a vacuum develops naturally in the fuel system as the fuel in the tank cools. The variables temperature and pressure are necessary for fuel tank leak detection. The temperature sensor is integrated into the control unit for fuel tank leak detection -J909-. The tank pressure sensor -G400- is fitted in the pressure control valve. The system is deemed leak-free if 2.5 mbar vacuum is measured as the tank temperature drops. If no vacuum develops, there is a leak in the fuel system, and an entry will be made in the event memory of the engine control unit.

Connection diagram - activated charcoal filter

1 -  Activated charcoal filter
Fitting location: In rear right wheel housing beneath liner
Removing and installing → Chapter.
2 -  Air filter
3 -  Pressure regulating valve
With tank pressure sensor -G400-
4 -  Breather line
From activated charcoal filter to engine
5 -  Cap
The gasket must not be dirty or damaged
6 -  Control unit for fuel tank leak detection -J909-
With temperature sensor
7 -  Fuel supply line
8 -  Breather line
9 -  Activated charcoal filter solenoid valve 1 -N80-
Checking → Vehicle diagnostic tester
Activated charcoal filter with fuel tank leak detection

Assembly overview - activated charcoal filter system
1 -  Connecting hose From air filter to pressure control valve 2 -  Hose clips 3 -  Pressure regulating v ...

Other materials:

Adjusting bonnet
Adjusting bonnet Special tools and workshop equipment required         Torque wrench -V.A.G 1331- Note Vehicle must be standing on its wheels to enable bonnet to ...

Pressure and boiling point
The boiling points given in the table below are always based on an atmospheric pressure of 1 bar. If the pressure on a liquid is changed, its boiling point changes also. It is well known that, for example, the lower the pressure, the low ...

Assembly overview - front door window
  Note Only the left side is shown. The right side is similar. 1 -  Front door 2 -  Door window Removing and installing → Chapter. 3 -  Inner door cover Removing and insta ...

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