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Delivery rate checking > < Checking fuel pump and fuel system

Leon Mk2

Functioning and voltage supply checking
Functioning and voltage supply checking
  Note
To carry out this work it will be necessary to disconnect the battery earth strap. The vehicle should be checked for a fitted radio. If necessary, obtain radio anti-theft code first.
–  Rock the rear seat forward.
–  Remove cover from fuel supply unit under rear seat.
–  Switch ignition on. The fuel pump should be heard to start (if the test has to be repeated, wait for at least ten seconds).
If the fuel pump does not run:
–  Switch ignition off.
–  Remove cover from fuse holder.
   
–  Remove fuse no. 41 from the fuse holder.
–  Connect remote control -V.A.G 1348/3A- with adapter cable -SAT 1348/3-3- to contact 41 to fuel pump and battery positive (+).
–  Operate remote control.
Fuel pump runs:
–  Check activation of fuel pump relay -J17- → Current flow diagrams, Electrical fault finding and Fitting locations.
Fuel pump does not run:
  N20-0513
–  Pull 4-pin connector -1- from fuel tank flange -2-.
–  Connect multimeter -V.A.G 1715- using cables from -V.A.G 1594 A- or -V.A.G 1594 C- to the outer contacts of the connector.
–  Operate remote control.
   Specification: approx. battery voltage
If the specification is not obtained:
–  Locate and eliminate the short circuit following the current flow diagrams.
If the specification is obtained (voltage supply OK.):
  N20-0244
–  Place turning tool -U-40055 A- on union nut and unscrew it from the flange.
–  Check that the electrical wires between flange and fuel pump are connected.
If no open circuit can be found:
–  Replace fuel supply unit → Chapter.
  E20-0003

Delivery rate checking > < Checking fuel pump and fuel system