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Checking current draw of fuel pump > < Checking fuel pump delivery rate

Golf Mk5

Checking voltage supply of fuel pump
Checking voltage supply of fuel pump
Special tools and workshop equipment required
t  Hand-held multimeter -V.A.G 1526D-
t  Pickup clamp -V.A.G 1526B/2-
   
t  Test instrument adapter/DSO (5-pin) -VAS 5565-
Test prerequisites
l  Fuses must be OK.
l  The battery voltage must be at least 12 V, if necessary connect a battery charger.
l  All electrical consumers, e.g. lights and rear window heating, must be switched off.
–  Remove seat bench → General body repairs, interior; Rep. gr.72.
–  Detach carpet under seats and fold it back. → General body repairs, interior; Rep. gr.70
–  Remove cover from fuel delivery unit.
–  Switch on ignition. The fuel pump must be heard to run for about 2 seconds.
–  Switch off ignition.
If the fuel pump does not start:
–  Pull connector off fuel delivery unit flange.
–  Connect test instrument adapter/DSO (5-pin) -VAS 5565- between connector and flange.
  W00-10599
–  Connect hand-held multimeter -V.A.G 1526D- to contacts -1- and -5- of adapter.
–  Connect vehicle diagnosis tester and perform guided function „checking electric fuel pump(s)“.
  Note
The fuel pump is now activated for 30 seconds.
–  Read voltage value on hand-held multimeter -V.A.G 1526D-: Specification = battery voltage.
If no voltage is present:
–  Check activation of fuel pump relay and wiring for an open or short circuit → Vehicle diagnostic tester.
Voltage supply OK:
–  Remove fuel delivery unit → Chapter.
–  Check that electrical wiring between flange and fuel pump is connected and has continuity.
If no open circuit can be found:
–  Renew fuel delivery unit.
  N20-10423

Checking current draw of fuel pump > < Checking fuel pump delivery rate