SEAT Workshop Service and Repair Manuals

Checking fuel tank breather

Special tools and workshop equipment required

t	Hose clamps, up to 25 mm -3094-

t	Removal wedge -3409-

t	Torque wrench -V.A.G 1331-

t	Engine and gearbox jack -V.A.G 1383 A-

t	Manual vacuum pump -VAS 6213-

t	Pressure tester -VAS 6550-

t	Adapter set -VAS 6550-

Test condition –  Observe safety precautions → Chapter. –  Observe rules for cleanliness → Chapter. –  Seal all open lines immediately after disconnecting. –  Note connections on activated charcoal filter → Fig.. l  Ignition must be switched off. Checking sequence

–  Unlock and disconnect breather line -2- (white). Separate push-on couplings → Chapter.

–  Connect hand vacuum pump -VAS 6213- with adapter set -VAS 6550/3- to line -1- leading to activated charcoal filter.

–  Move slide ring -1- on hand vacuum pump -VAS 6213- to position -A- for „vacuum“. –  Operate hand vacuum pump -VAS 6213- several times. Vacuum must not build up. If a vacuum builds up:

–  Open tank flap. –  Remove cap -arrow- from fuel filler neck. –  Clean area around fuel filler neck. –  Drain fuel tank → Chapter. –  Remove tank flap unit → General body repairs, exterior; Rep. gr.55. –  Remove bench seat → General body repairs, interior; Rep. gr.72.

–  Unclip cover -1- at retaining tabs -arrows-, using removal wedge -3409-.

–  Release connector -1- and unplug. –  Remove rear right wheel → Wheels, tyres, wheel alignment; Rep. gr.44.

–  Unscrew bolts -arrows- of filler neck -1- from body structure.

–  Position engine and gearbox jack -V.A.G 1383 A- below vehicle to support tank.

–  Unscrew bolts -arrows- on fuel tank -1-. –  Lower fuel tank by 6 cm.   Caution Ensure that there is sufficient clearance to all components. –  Check breather hose → Item on activated charcoal filter for soiling and clean if necessary. –  Repeat check. Checking for leaks.

–  Loosen activated charcoal filter -1- from retainer -3-. –  Disengage locking lug -2- upwards in -direction of arrow A-. –  Pull activated charcoal filter -1- in -direction of arrow B- out of retainer -3-.

–  Disconnect lines from connections -T- → Item and -A- → Item. Separate push-on couplings → Chapter.

–  Connect -T- and -A- by means of a standard hose -2-, in order to seal the connections.   Note Connection -T- can also be sealed with the sealing tool -T10249/2-. Connection -A- must then also be sealed using suitable means. –  Operate hand vacuum pump -VAS 6213- several times. A vacuum must build up. If a vacuum does not build up:

Proceed as follows to check activated charcoal filter system at separating point on underbody: –  Disconnect line -1- (white) on underbody. Separate push-on couplings → Chapter.

–  Connect line to activated charcoal filter -1- with hand vacuum pump -VAS 6213-, adapter -VAS 6550/3-1- and a standard hose. l  Connections -A- and -T- are sealed by means of a standard hose → Anchor. –  Operate hand vacuum pump -VAS 6213- several times. A vacuum must build up. If a vacuum builds up: –  Check line between separating point in engine compartment and separating point on underbody. Renew, if necessary. If a vacuum does not build up:

–  Disconnect line from connection -M- of activated charcoal filter. Separate push-on couplings → Chapter.

–  Connect hand vacuum pump -VAS 6213- with adapter -VAS 6550/3- to connection -M- of activated charcoal filter -1-. –  Connect -T- and -A- by means of a standard hose -2-, in order to seal the connections. –  Operate hand vacuum pump -VAS 6213- several times. A vacuum must build up. If a vacuum builds up:

–  Check line between separating point -1- (white) on underbody and connection -M- on activated charcoal filter. Renew, if necessary. If a vacuum does not build up: –  Renew activated charcoal filter → Chapter. If vacuum builds up and lines are OK, proceed as follows: Check activated charcoal filter system solenoid valve 1 -N80-. To do that, proceed as follows: l  Ignition switched off

–  Press in locking tabs -arrows- and remove intake connecting piece -1- in -direction of arrow-.

–  Disconnect hose -1- at air cleaner housing. –  Pull air filter housing upwards off studs at positions -2- and -3-.

–  Seal line -3- between activated charcoal filter solenoid valve 1 -N80- and throttle valve module -J338-. –  To do this, use hose clips up to 25 mm -3094-.

–  Disconnect bleeder line -2- (white). Separate push-on couplings → Chapter. –  Using a connecting nipple -VAS 6550/3-1- and a standard hose, connect hand vacuum pump -VAS 6213- to line leading to active charcoal filter system solenoid valve 1 -N80-. –  Operate hand vacuum pump -VAS 6213- several times. A vacuum must build up. If a vacuum does not build up: –  Check lines and renew, if necessary. If no fault is found: –  Replace the activated charcoal filter system solenoid valve 1 -N80-. Installation Installation is in the reverse sequence of removal. Note the following: –  Install fuel tank → Chapter. t  Take installation position of earth connection into account → Fig. t  Make sure that the filler neck of the fuel tank is correctly inserted into the opening in the body. t  Use engine and gearbox jack -V.A.G 1383 A- to position fuel tank on underbody. t  Ensure proper seating of activated charcoal filter in retainer on fuel tank. t  Install breather and fuel lines free of kinks. t  Ensure that line connections are tight. t  After installing fuel tank, check that supply and breather lines are still clipped onto fuel tank.

t  Note the schematic diagram on activated charcoal filter.