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

Volkswagen Golf Service & Repair Manual / Fuel supply system - Petrol engines / Fuel supply, gas operation / Activated charcoal filter with fuel tank leak detection / Connection diagram - activated charcoal filter

Note

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

Black

8 -	Breather line

White

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:

Assembly overview - flaps and partitions in air distribution housing
Note The illustration shows a left-hand drive vehicle. View from front Note -Arrow- = Direction of travel → Chapter „Assembly overview - heater and ...

Changing headlights over from driving on left to driving on right (gas discharge headlights)
If a right-hand drive vehicle is driven in a left-hand drive country, or vice versa, the headlights must be converted. This is necessary in order to avoid dazzling oncoming traffic with the asymmetric low beam headlights. Note ...

Removing and installing temperature sensor -G18- and overheating sensor -G189
Removing – Dismantling and assembling auxiliary heater → Chapter. – Remove bolt -1- (4 Nm) and remove retaining spring -2-. ...