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Checking the function of the fuel shut-off valveN109 > < Removing and installing the dosing pumpV54 with its component parts

Octavia Mk2

Check fuel flow rate
Check fuel flow rate
Special tools and workshop equipment required
t  → Vehicle diagnostic tester
t  Commercial measuring glass
Test requirements
l  Voltage at the dosing pump -V54-: approx. battery voltage → Current flow diagrams, Electrical fault finding and Fitting locations.
l  Resistance of dosing pump -V54-: approx. 5.2 Ω → Current flow diagrams, Electrical fault finding and Fitting locations.
l  No fault in fault memory → Vehicle diagnostic tester
l  Ambient temperature below 25°C.
l  Coolant temperature below 30°C.
l  Fuel lines are not damaged or leaking.
l  Fuel reservoir is filled adequately (fuel gauge in the dash panel insert is not at the red level).
Test sequence
  WARNING
The fuel line is under pressure! Place cleaning cloths around the connection point before detaching hose connections. Reduce pressure by carefully removing the hose.
   
–  Disconnect fuel line at the dosing pump -V54- and close with suitable means.
  S82-0018
–  Call up the guided function „check fuel flow rate“ with the vehicle diagnosis, measurement and information system, open the fuel line and at the same time hold the measuring glass.
After approx. 30 seconds the fuel line is filled and ventilated.
–  Close fuel line.
–  Empty measuring glass.
–  Call up the guided function „check fuel flow rate“ with the vehicle diagnosis, measurement and information system, open the fuel line and at the same time hold the measuring glass.
After approx. 120 seconds the fuel delivery is finished.
–  Reconnect the fuel line.
Nominal flow rate: 22 to 28 ml.
–  If the nominal rate is not achieved, replace dosing pump -V54- → Item.
  S82-0021

Checking the function of the fuel shut-off valveN109 > < Removing and installing the dosing pumpV54 with its component parts