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Checking fuel pressure > < Checking fuel pump

Golf Mk5

Checking function and voltage supply
Checking function and voltage supply
l  Battery charge at least 11.5 V.
l  Fuse SC27 on fuse holder OK.
l  Fuel pump control unit -J538- is OK.
l  Fuel pressure sender for low pressure -G410- is OK.
–  Switch on ignition. Fuel pump must run briefly.
  Note
The fuel pump runs very quietly.
–  Switch off ignition.
If fuel pump does not run
–  Remove seat bench → General body repairs, interior; Rep. Gr.72.
   
–  Pull connector off fuel pump control unit -J538-.
  N20-0616
–  Check voltage supply between contacts -1- and -6- using voltmeter -V.A.G 1527/B-. The LED must light up.
If LED does not light up.
–  Locate and eliminate open circuit using current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations.
If LED lights up (voltage supply OK).
  N20-0617
–  Remove cover -1- with fuel pump control unit -J538--2- from fuel delivery unit.
–  Pull 5-pin connector off fuel delivery unit flange.
  N20-0603
–  Open locking ring using wrench -T10202-.
–  Check that electrical wires between flange and fuel pump are connected.
If no open circuit can be found.
–  Fuel pump is defective. Renew fuel delivery unit → Chapter.
  N20-0638

Checking fuel pressure > < Checking fuel pump