seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

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Engine control unit > < Servicing injection system

Leon Mk1

Test sequence
Test sequence
–  Remove air cleaner → Fig.
–  Remove the vacuum valve -1- → Item
–  Connect the vacuum valve -V.A.G 1368--connection A- (the arrow in the vacuum valve 1 points towards -V.A.G 1368-).
   
–  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 -SAT 1390- several times. Vacuum must not build up.
  Note!
In the rest position, the vacuum valve is open
If vacuum builds up:
–  Replace the vacuum pump.
  E24-0136
If vacuum does not build up:
–  Cover the nozzle -2- of the vacuum valve.
–  Hold the vacuum valve.
–  Operate hand vacuum pump -SAT 1390- several times until the valve closes, clicking audibly.
  Note!
The vacuum valve will close with a pressure of between 250 and 350 mbar
If the valvve does not close:
–  Replace the vacuum pump.
  E24-0136

Engine control unit > < Servicing injection system