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Checking delivery rate > < Checking fuel pump

Leon Mk2

Checking function and voltage supply
Checking function and voltage supply
   
Check conditions
l  Fuse No. 8 OK.
l  Battery voltage at least 11.5 V
l  Fuse No. 7 OK.
–  Remove cover from fuel delivery unit.
–  Briefly operate starter. Fuel pump must be heard to run for approx. 1 second (wait at least 10 seconds if the test must be repeated)
–  Switch off ignition.
If the fuel pump does not run:
–  Pull fuel pump relay -J17- out of relay plate (position 8).
  Note!
Disconnect battery earth strap first if the relay is to be removed using a tool. Check first if the vehicle is fitted with a coded radio and if this is the case, obtain anti-theft code for the radio.
  N01-0220
–  Connect remote control -V.A.G 1348/3A- with adapter cable -V.A.G 1348/3-2- to contact 2 (to fuel pump) and battery positive (+).
–  Operate remote control.
Fuel pump runs:
–  Check activation of fuel pump relay using current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations.
Fuel pump does not run:
–  Fold rear seat bench forwards.
–  Remove fuel filler flap unit.
With open filler filler flap:
  E20-0050
–  Pull 4-pin connector -arrow- off flange on fuel delivery unit.
–  Connect diode test lamp -V.A.G 1527B- with auxiliary cables from -V.A.G 1594A- to the outer contacts of the connector.
–  Operate remote control. LED must light up
LED does not light up:
–  Locate and eliminate open circuit using current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations.
LED lights up (voltage supply OK.):
–  Remove fuel delivery unit using tool -U-40055A- → Chapter.
–  Check that the electrical wires between flange and fuel pump are connected.
If no open circuit can be found:
–  Fuel pump defective, renew fuel delivery unit → Chapter, Removing and installing fuel delivery unit.
  E20-0013

Checking delivery rate > < Checking fuel pump