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3 cylinder Fuel-injection engine, belt drive (4 valves) > < Testing quantity of fuel delivered

Leon Mk2

Checking current draw
Checking current draw
–  Observe safety precautions → Chapter.
–  Observe rules for cleanliness → Chapter.
l  Battery charger connected.
l  Voltage supply OK → Chapter.
–  Remove bench seat → General body repairs, interior; Rep. gr.72.
   
–  To do this, unclip cover -1- for flange at retaining tabs -arrows-, using removal wedge -3409-.
  A20-10835
–  Check that connector -1- is fitted securely by pulling connector without pressing catch. The connector can cause a fault if it has not been fitted correctly.
–  Release connector -1- and unplug.
–  Check contacts on plug and on fuel delivery unit for damage.
  N20-10928
–  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 the power consumption of the fuel pump:
l  Specification: 8 Amps maximum
  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:
–  Remove fuel delivery unit → Chapter.
–  Check filter strainer for soiling.
Check OK:
–  Fuel pump is defective, renew fuel delivery unit → Chapter.
  N20-10424

3 cylinder Fuel-injection engine, belt drive (4 valves) > < Testing quantity of fuel delivered