S6 V8-4.2L (BBD) (2004)
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Disconnect electrical harness connectors -4- from ignition coils at left cylinder head.
NOTE: Disregard the other items.
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Disconnect electrical harness connectors -1- from ignition coils at right cylinder head.
NOTE: Disregard the other items.
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Connect e.g. V.A.G 1527 B voltage tester as follows:
Harness connector
Measure to
Terminal
2
B+
4
B+
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LED must light up.
If LED does not light up:
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Check the wire connections for open circuit.
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Specified value: Wire resistance max 1.5 Ohm
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If necessary, repair wire connection.
If LED lights up:
Checking voltage supply