SEAT Workshop Service and Repair Manuals

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ V.A.G 1368 Vacuum tester

• ◆ V.A.G 1390 Hand vacuum pump

Test sequence

• ‒ → Pull breather pipe/hose -3- off activated charcoal filter solenoid valve 1 -1-.
• ‒ Connect vacuum tester V.A.G 1368 -connection A- to activated charcoal filter solenoid valve 1 -1-.
• ‒ Connect hand vacuum pump V.A.G 1390 to vacuum tester V.A.G 1368 -connection B-.
• ‒ Set vacuum tester to -A/B- position.
• ‒ Initiate final control diagnosis and select activated charcoal filter solenoid valve 1 (N80):

=> Repair group 01; Final control diagnosis; Performing final control diagnosis

• ‒ Operate hand vacuum pump V.A.G 1390 several times.
      Vacuum must not
  build up.

If vacuum builds up:

• ‒ Check breather pipe/hose -4- on activated charcoal filter for soiling and clean if necessary.

If vacuum does not build up:

• ‒ → Seal off breather pipe/hose -arrow- from activated charcoal filter.
• ‒ Initiate final control diagnosis again and select activated charcoal filter solenoid valve 1 (N80):

=> Repair group 01; Final control diagnosis; Performing final control diagnosis

• ‒ Operate hand vacuum pump V.A.G 1390 several times.
      Vacuum must build up.

If vacuum does not build up:

• ‒ Check pressure retaining valve , Item 3

• ‒ → Check breather pipe/hose -2-from pressure holding valve at fuel tank for leaks.