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Removing and installing fuel pump > < Checking the function and supply voltage

Octavia Mk1

Inspecting fuel flow rate
Inspecting fuel flow rate
Test conditions
l  Supply voltage OK
l  Battery voltage at least 11.5 V.
l  Fuel temperature 15...30°C.
l  Fuel tank at least 1/4 full.
Test sequence
–  Unscrew the fuel tank cap from the filler neck.
–  Fold rear seat forwards.
–  Remove cover from the fuel pump.
–  Unplug 4-pin plug from fuel pump.
   
–  Connect remote control -V.A.G 1348/3A- with connection lines from measuring tool set to contact -1- of the fuel pump and to battery +.
–  Use connection lines from the measuring tool set to connect the contacts -4- to the plug and to the fuel pump.
–  Pull off the fuel feed line at the fuel filter and gather residual fuel in a cloth.
  WARNING
The fuel feed line is pressurized! Place a clean cleaning cloth around the connection point before detaching hose connections. Reduce pressure by carefully releasing the connection point.
–  Connect adapter -V.A.G 1318/17 - and -V.A.G 1318/16- to fuel pump and hold in the measuring vessel.
–  Activate the remote control -V.A.G 1348/3A- for 30 seconds.
  S20-0279
–  Compare the amount of the fuel pumped to the specified value (the amount of the fuel pumped is dependent on the voltage of the fuel pump).
If the minimum flow rate is not reached:
–  Remove the fuel pump and check whether the pump strainer is not clogged up.
If no fault was detected until now:
–  Replace fuel pump.
  S20-0278

Removing and installing fuel pump > < Checking the function and supply voltage