SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cylinder Gasoline direct injection engine, 2.0 litre turbo 4V, mechanics | Mixture preparation system, electronic inj.,Gas

Checking dual non-return valve

Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Vacuum pump -VAS 6213-, see equivalent → Anchor

Checking sequence

–	Disconnect the plug connector from the solenoid valve 1 for the active carbon filter -N80- and from the fuel pressure sender, low pressure -G410--arrows-.

–	Remove the solenoid valve 1 for activated carbon filter -N80--B- from hose -A-.

–	Move the ring -1- of the manual vacuum pump -VAS 6213- to position -A- for „vacuum“.

–	Connect the vacuum pump -VAS 6213- on the hose to the dual non-return valve -arrow-.

–	Operate the vacuum pump -VAS 6213- a few times, a vacuum must be created.

If no vacuum is created, replace the double non-return valve.

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