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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 A-)
t  Wrench for union nut (e. g. -MP 1-227 -)
t  Current flow diagram
Test conditions
l  Holding pressure o.k, check → 1.4 ltr./44 kW engine, fuel injection → Rep. Gr.24
l  Battery voltage at least 12 V
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:
Check fuel pump relay -J17- → 1.4 ltr./44 kW engine, fuel injection → Rep. Gr.24.
If the fuel delivery unit does not run:
–  Unscrew cover (below rear seat).
–  Unlock and unplug 4-pin connector of flange at fuel tank.
   
–  Connect handheld multimeter (e. g. -V.A.G 1526-) with adapter cables (e. g. from -V.A.G 1594 A-) 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 wiring is connected and/or check for open circuit.
If no open circuit was detected:
Fuel delivery unit defective.
–  Replacing fuel delivery unit → Chapter.
  A20-0099

Check fuel flow rate > < Connecting remote control