Check Fuel Flow Rate - Skoda OCTAVIA MK1 Service Manual

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-
– Activate remote control.
If the fuel delivery unit runs:
Testing fuel pump relay:
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

Check fuel flow rate

Special tools and workshop equipment required
→ 1.6 ltr./74 kW Motor, Simos 2 Injection and ignition system; Rep.
→ Chapter.
115
→ Chapter.