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:

Without needing to purge refrigerant circuit of contaminants (e.g. damage in an accident); no refrigerant has escaped and no moisture or dirt has entered refrigerant circuit
Drain refrigerant circuit. – Renew restrictor. Depending on vehicle – Remove receiver or reservoir. – Clean any dirt out of receiver or reservoir. ...

Removing and installing fresh air blower control unit -J126-, RHD vehicles
Removing – Remove baffle plate → Chapter. – Disconnect electrical connectors -1- and -4-. – Remove bolts ...

Checking inner constant velocity joint
Removing The joint is to be dismantled when following work is done: Replacement of grease if very contaminated Check of running surfaces for wear Check of balls for wea ...