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Bleeding fuel system > < Checking current draw

Golf Mk5

Checking non-return valve for fuel pump
Checking non-return valve for fuel pump
Special tools and workshop equipment required
   
t  Stepladder -VAS 5085-
  W00-0713
–  Connect remote control for V.A.G 1348 -V.A.G 1348/3A- to contact -5- of fuel pump and battery positive (+) using adapter cables from auxiliary measuring set -V.A.G 1594C-.
–  Connect contact -1- on connector and contact -1- on fuel pump using adapter cables from auxiliary measuring set -V.A.G 1594C-.
  WARNING
Fuel supply lines are under pressure! Wear eye protection and gloves to avoid injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.
  N20-10480
–  Pull off supply line -1- from fuel filter inlet.
  Note
Press in securing ring to release fuel line.
–  Connect pressure tester -V.A.G 1318- using adapters -V.A.G 1318/17- as shown.
–  Push adapter -V.A.G 1318/1- onto adapter -V.A.G 1318/11- of pressure tester and hold it in measuring container.
–  Close pressure tester -V.A.G 1318- shut-off tap (lever at right angles to direction of flow - position -B-).
–  Operate remote control at short intervals until a pressure of approx. 4 bar has built up.
  WARNING
Danger of spray when shut-off tap is opened. Wear eye protection and protective clothing to avoid injuries and skin contact. Hold container in front of open connection of pressure tester.
–  If pressure builds up too high, relieve excess pressure by carefully opening shut-off tap.
–  Watch pressure drop on pressure gauge. After 10 minutes, pressure must not drop below 3 bar.
If the pressure drops further:
–  Check line connections for leaks.
If no fault in lines is detected:
–  Fuel pump defective, renew fuel delivery unit → Chapter.
  N20-0531

Bleeding fuel system > < Checking current draw