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Electronic Engine Power Control (Electronic throttle) > < Checking fuel flow rate with pressure gauge VAS 6550

Octavia Mk2

Check power consumption
Check power consumption
–  Fold up rear seat.
   
–  Unclip the cover -4- with the fuel pump control unit -J538--1-.
  S20-0159
–  First of all check the plug -1- for correct fit. To do so, pull on the plug without pressing the catch. If the plug connection was not correctly positioned, this could cause a fault.
–  Now unplug the plug -1-.
–  Check the contacts at the plug and at the fuel delivery unit for damage.
If no damage was detected:
–  Fit again plug -1-.
  M20-0232
–  Connect the current probe -A- of the vehicle diagnosis, measurement and information system -VAS 505X- on the line -B- to contact 1 of the 5-pin plug.
If the current probe cannot be connected on the line -B- to contact 1 of the 5-pin plug because of the length of the insulation:
  S20-0269
–  Connect the adapter for measuring method/DSO (5-pin) -VAS 5565- to the plug connection and to the fuel delivery unit.
–  Connect the current probe -A- on the red cable - with the inscription “current probe” - of the adapter for measuring method/DSO (5-pin) -VAS 5565-.
Continued for all
–  Start engine and run in idle.
–  Measure power consumption of the fuel delivery unit.
   Specified value: max. 9 A
  Note
If the fault in the fuel supply system is intermittent then tests can be undertaken during a test drive but then two people are required for this.
If the specfied current uptake is exceeded:
–  Fuel pump defective, replace fuel delivery unit → Chapter.
  N20-10424

Electronic Engine Power Control (Electronic throttle) > < Checking fuel flow rate with pressure gauge VAS 6550