Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Using multimeter and adapter cables from V.A.G 1594 measure the supply voltage between contacts 1 + 2 and 1 + 4 of disconnected connector.
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Switch on ignition.
Specification: Min. 11.5 V
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Switch off ignition.
If no voltage is present:
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Check wire between 4 pin connector contact 2 and relay plate for open circuit according to wiring diagram.
Wire resistance: max. 1.5 Ohms
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Check wiring between 4-pin connector and Ground (GND) for open circuit according to wiring diagram.
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Terminal 2 and Ground (GND)
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Terminal 4 and Ground (GND)
Wire resistance: max. 1.5 Ohms
If there is no malfunction in the supply voltage:
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Check activation.
Checking activation
WARNING! During the following test do not touch the connecting parts of the ignition coils or test cables.