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Check fuel flow rate > < Connecting remote control

Octavia Mk1

Check the fuel delivery unit
Check the fuel delivery unit
Special tools and workshop equipment required
t  Handheld multimeter (e.g. -V.A.G 1526 -)
t  Measuring tool set (e.g. -V.A.G 1594-)
t  Remote control -V.A.G 1348/3A - with adapter cable -V.A.G 1348/3-2-
t  Wrench for union nut -MP 1-227 -
t  Current flow diagram
Test conditions
l  Battery voltage at least 12 volts
l  Fuse no. 28 o.k.
l  Fuel filter o.k.
Test sequence
–  Switch on ignition.
The fuel delivery unit must be heard to start running. (A second person is required for this purpose if the level of surrounding noise is high).
If the fuel delivery unit does not run:
–  Switch off ignition.
–  Connect remote control -V.A.G 1348/3A- with adapter cable -V.A.G 1348/3-2- → Chapter.
–  Activate remote control.
If the fuel delivery unit runs:
Testing fuel pump relay: → 1.6 ltr./74 kW Motor, Simos 2 Injection and ignition system; Rep. Gr. 24; test fuel pressure regulator and holding pressure
If the fuel delivery unit does not run:
–  Unscrew cover (below rear seat).
–  Unlock 4-pin connector of flange at fuel tank.
   
–  Connect hand-held multimeter (e. g. -V.A.G 1526-) with adapter cables (e. g. from -V.A.G 1594-) to the outer contacts of the connector.
–  Activate remote control. Specified value: approx. battery voltage
If the specified value is not reached:
–  Determine and remove open circuit in the wiring according to the current flow diagram: → Current flow diagrams and Fitting locations
If the specified value is reached:
–  Unscrew union nut with wrench -MP 1-227 -.
–  Check whether the electric cables are connected between flange and fuel pump, and test for open circuit if necessary.
If no open circuit was detected:
Fuel delivery unit defective.
–  Replacing fuel delivery unit → Chapter.
  A20-0099

Check fuel flow rate > < Connecting remote control