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Volkswagen Golf Workshop Service and Auto Repair Manuals

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Checking non-return valve for fuel pump > < Checking fuel delivery rate

Golf Mk5 Fuel Pump Current Draw - Check for Repairing

Checking current draw
Checking current draw
–  Remove bench seat → General body repairs, interior; Rep. gr.72.
   
–  Remove cover from fuel delivery unit.
  A20-1206
–  First check that the connector -arrow- is fitted securely by pulling the connector without pressing the catch. The connector can cause a fault if it has not been fitted correctly.
–  Now pull off connector.
–  Check the contacts on the connector and on the fuel delivery unit for damage.
  N20-10623
–  Connect test instrument adapter/DSO (5-pin) -VAS 5565- to connector and fuel delivery unit.
–  Connect pick-up clamp -A- to red terminal with lettering „pick-up clamp“ for test instrument adapter/DSO (5-pin) -VAS 5565-.
–  Start engine and run at idling speed.
–  Measure current draw of fuel pump.
l  Specification: max. 9 amps.
  Note
t  The starting current for the fuel pump can lie briefly above specifications when starting the engine.
t  If the fault in the fuel system is not always evident, the check can also be carried out during a road test. A 2nd person is required to do this, however.
If the current draw is exceeded:
–  Fuel pump defective, renew fuel delivery unit → Chapter.
  N20-10424

Checking non-return valve for fuel pump > < Checking fuel delivery rate