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Fuel pump retention valve: check, engine code BGU > < Fuel delivery quantity: check, engine codes BSE, BSF, CCSA, CMXA

Leon Mk2

Current consumption: Check
Current consumption: Check
–  Remove rear seat → bodywork - interior fitting work; Rep. gr.72 .
–  Loosen the floor cover below the seats and tip this to rear.
   
–  Remove the protection elements from fuel delivery unit (depending on the version).
  N20-0687
–  Release retainers -arrows- at cover for sealing flange.
  A20-1206
–  First check if the connector -arrow- has been inserted correctly; pull on the connector without pressing the locking mechanism. Malfunctions may arise when the connector has not been inserted correctly.
–  Detach connector.
–  Check the contact on the plug connector and the fuel supply unit for damage.
  N20-10623
–  Connect the adapter for the DSO measuring/oscilloscope module (5 contacts) -VAS 5565-to the connector in the fuel supply unit.
–  Connect the ammeter clip -A-to the red cable marked „Stromzange (ammeter clip)“ on theDSO (5 contact) adapter for the measuring/oscilloscope module -VAS 5565-.
–  Start engine and run at idling speed.
–  Measure the power consumption of the fuel pump:
l  Specification: 9 Amps maximum
  Note
t  The starting current of the fuel pump can be more than the specification for a short period when starting the motor.
t  When an irregular fault of the fuel system occurs sporadically, the inspection can also be carried out for a test drive. The help of a second mechanic will be needed.
If the current draw is exceeded:
–  Fuel pump is defective, renew fuel delivery unit → Chapter.
  N20-10424

Fuel pump retention valve: check, engine code BGU > < Fuel delivery quantity: check, engine codes BSE, BSF, CCSA, CMXA