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Checking current consumption of fuel system pressurisation pump > < Checking fuel system pressurisation pump delivery rate

Polo Mk5

Checking voltage supply of fuel system pressurisation pump
Checking voltage supply of fuel system pressurisation pump
Special tools and workshop equipment required
t  Vehicle diagnosis tester
t  Pickup clamp -V.A.G 1526B/2-
   
t  Hand-held multimeter -V.A.G 1526D-
  W00-10706
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.
l  Visual check of cables OK.
Test sequence:
–  Fold up rear seat on right vertically → General body repairs → Rep. gr.72.
–  Raise cover of fuel delivery unit.
  W00-10599
–  First check that connector -arrow- is fitted securely by pulling connector without pressing catch. The connector can cause a fault if it has not been fitted correctly.
–  Pull connector off fuel delivery unit flange.
–  Connect test instrument/DSO adapter (5-pin) -VAS 5565- between connector and flange.
  N20-10623
–  Connect hand-held multimeter -V.A.G 1526D- to contacts -1- and -5- of adapter.
–  Connect vehicle diagnosis tester and carry out guided function „Checking electronic 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 (- 0.5 V OK).
If no voltage is present:
–  Check activation of fuel pump relay and wiring for an open or short circuit → Vehicle diagnostic, testing and information system VAS 5051.
Voltage supply OK.
–  Check current consumption of fuel pump → Chapter.
  S20-0357

Checking current consumption of fuel system pressurisation pump > < Checking fuel system pressurisation pump delivery rate