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 -5- from activated charcoal filter -1- off the throttle valve control part -3-.
• ‒ Connect hand vacuum pump V.A.G 1390 to pipe/hose -5-.
• ‒ Pull breather pipe/hose -4- from fuel tank off activated charcoal filter and connect to -connection A- of vacuum tester V.A.G 1368.
• ‒ Connect vacuum tester V.A.G 1368 -connection B- to breather pipe/hose -2-.
• ‒ Set vacuum tester to position -B-.
• ‒ Introduce final control diagnosis and select activated charcoal filter solenoid valve (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 connection -6- on activated charcoal filter -1- for soiling, clean if necessary.

If vacuum does not build up:

• ‒ → Connect hand vacuum pump V.A.G 1390 to vacuum tester V.A.G 1368 -connection B-.
• ‒ Set vacuum tester to -A/B- position.
• ‒ Operate V.A.G 1390 several times. Vacuum must
      build-up.

If vacuum does not build up:

• ‒ Check pressure retaining valve , Item 8
• ‒ Check pipe/hose -1- from fuel tank for blockage.