skoda Workshop Repair Guides

Skoda Octavia Workshop Service and Auto Repair Manuals

ABOUT US
Removing and installing fuel delivery unit (Octavia II) > < Removing and installing the fuel tank on vehicles with four-wheel drive (Octavia II)

Checking fuel pump for Octavia Mk2 TDI PD Engine

Checking fuel pump (Superb II, Octavia II)
Checking fuel pump (Superb II, Octavia II)
Special tools and workshop equipment required
t  Remote control, e.g. -V.A.G 1348/3A-
t  Measuring tool set, e.g. -V.A.G 1594 C-
t  Adapter, e.g. -V.A.G 1318/16 -
t  Adapter, e.g. -V.A.G 1318/17 -
t  Measuring vessel
Inspecting proper operation and power supply
Test conditions
l  Battery voltage at least 11.5 V.
l  Fuses o.k. (No. 27).
l  All electrical consumers such as the lights and rear window heater must be switched off.
Test sequence
–  Removing rear seat bench → Body Work; Rep. Gr.72.
–  Remove the cover from the fuel delivery unit.
–  Switch on ignition. The fuel pump must be heard to start running.
–  Switch off ignition.
If the fuel pump does not run:
–  Continuing searching for faults using a multimeter (e.g. -V.A.G 1715-) → Current flow diagrams and Fitting locations.
Check fuel flow rate
Test conditions
l  Supply voltage is o.k.
l  Battery voltage at least 11.5 V.
l  Fuel temperature 15…30 °C.
l  Fuel tank at least 1/4 full.
Test sequence
  Note
t  Safety precautions when working on the fuel supply system → Chapter.
t  Observe the regulations concerning cleanliness when working on the fuel supply/injection system → Chapter.
–  Switch off ignition and withdraw ignition key.
–  Unscrew the cap from the filler neck.
–  Removing rear seat bench → Body Work; Rep. Gr.72.
–  Remove the cover from the fuel delivery unit.
  Note
For vehicles with auxiliary heating, the plug connection for the dosing pump -V54- must be disconnected additionally.
–  Unplug the 5-pin plug from the fuel delivery unit.
   
–  Connect remote control -V.A.G 1348/3A- with connection lines from the measuring tool set to contact -1- of the fuel delivery unit and to battery positive terminal.
–  Use connection lines from the measuring tool set to connect the contacts -5- to the plug and to the fuel pump.
–  Pull off the fuel feed line from the flange of the fuel delivery unit.
–  Connect adapter -V.A.G 1318/17- and -V.A.G 1318/16- to the fuel delivery unit and hold in the measuring vessel.
–  Activate remote control -V.A.G 1348/3A- for 30 seconds.
  S20-0303
–  Compare the fuel rate with the specified value.
  Note
t  The amount of the fuel pumped is dependent on the voltage.
t  The diagram refers to the voltage which exists at the fuel pump.
t  The voltage at the fuel pump is about 2 volts less than the battery voltage.
If the minimum flow rate is not reached:
–  Remove the fuel delivery unit and check whether the pump strainer is not clogged up.
If no fault was detected until now:
–  Replace fuel delivery unit.
  S20-0278

Removing and installing fuel delivery unit (Octavia II) > < Removing and installing the fuel tank on vehicles with four-wheel drive (Octavia II)