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Skoda Workshop Service and Repair Manuals

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Checking wires > < Checking the ignition transformer (for engines with engine identification characters AUA, AUB)

Fabia Mk1

Checking voltage supply
Checking voltage supply
Test condition
   
l  Fuse 52 must be OK
  S01-0094
–  Measure power supply between contacts 2 + 4 of the removed plug using the multimeter.
–  Switch on ignition.
Specified value: min. 11.5 V
–  Switch off ignition.
If no voltage is present:
  S28-0151
–  Check the cable between the 2-pin plug and the relay plate for interruption according to the current flow diagram.
Cable resistance: max. 1.5 Ω
–  Check the cable between 4-pin plug contact 4 and earth for interruption according to the Current Flow Diagram.
Cable resistance: max. 1.5 Ω
Test control
  WARNING
During the following test do not touch neither the connecting parts of the ignition transformer nor the auxiliary cables.
  S24-0581
–  Unplug connector -arrows- of the injectors.
  S24-0576
–  Connect the diode test lamp to contacts 1 + 4 (ignition outlet 1) and contacts 3 + 4 (ignition outlet 2) of the removed plug.
–  Activate the starter and check the ignition signal of the engine control unit. The LED must flash.
–  Switch off ignition.
If the LED flashes and there is a voltage existing between contact 2 and 4:
–  Replace ignition transformer -N152- → Item.
If the LED does not flash:
–  Test the cable connections → Chapter.
  S24-0581

Checking wires > < Checking the ignition transformer (for engines with engine identification characters AUA, AUB)