Skoda Workshop Service and Repair Manuals > Octavia Mk2 > Power unit | 1.4/55; 59 kW MPI engine | Fuel supply, gas operation | Fuel Supply | Testing fuel pump

Check power consumption

–	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.

–	First of all check the plug -1- for correct fit. To do so, pull on the plug connection 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-.

–	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:

–	Connect the adapter for measuring method/DSO (5-pin) -VAS 5565- to the plug and to the fuel delivery unit.

–	Connect the current probe -A- to the red cable - with the lettering „current probe“ - of the adapter for measuring method/DSO (5-pin) -VAS 5565-.

Continued for all

–	Start engine and run in idle.

–	Measure voltage consumption of the fuel pump.

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.

Skoda Workshop Service and Repair Manuals