SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 4-cyl. injection engine, mechanics (4- valve) | Fuel supply, gas operation | Activated charcoal filter system | Servicing parts of the activated charcoal filter system checking

Servicing parts of the activated charcoal filter system checking

Special tools and workshop equipment required

t	hand vacuum pump -SAT 1390-

t	vacuum tester -V.A.G 1368-

t	adapter -SAT 1368/1-

Test sequence

–	Remove from throtle control unit -3- the breather tube -2- from the activated charcoal filter -1-.

–	Fit tube -2- to the manual vacum pump -SAT 1390-.

–	Remove the breather tube -5- which gos from the fuel tank to the activated carbon filter and attach to tester -V.A.G 1368-“connection A”. To do this, use -SAT 1368/1- adapter.

–	Fit breather tube -4- that goes to the activated carbon filter to the testing vacum guage -V.A.G 1368-“connection B”. To do this, use -SAT 1368/1- adapter.

–	Set vacuum tester to position “B”.

–	Initiate the final control diagnosis and activate the activated charcoal filter solenoid valve -N80- an Read fault memories of all control units → Injection and Ignition System, 4LV; Rep. Gr.01..

–	Operate hand vacuum pump several times. Without creating a depression.

If vacuum builds up:

–	Check breather tube -6- from the activated carbon filter -1- for dirt, clean if necessary.

If vacuum does not build up:

–	Unscrew fuel filler cap.

–	Connect hand vacuum pump -SAT 1390- to vacuum tester -V.A.G 1368-“connection B”

–	Set vacuum tester to position “A/B”.

–	Operate hand vacuum pump several times. Without creating a depression.

If vacuum builds up:

–	Check gravity/overflow valve → Item.

–	Check pipe/hose -1- from fuel tank for blockage.

If vacuum does not build up:

–	Refit fuel filler cap.

–	Operate hand vacuum pump several times. Without creating a depression.

Note!

If the fuel level in the tank is low the hand vacuum pump must be operated at least 20...30 times.

If vacuum builds up:

–	Replace fuel tank cap.

SEAT Workshop Service and Repair Manuals