A4 V6-3.0L (AVK) (2004)
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Unbolt coolant expansion tank (arrow).
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Disconnect electrical wiring to Engine Coolant Level (ECL) warning switch -F66- on bottom of expansion tank.
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Lay coolant expansion tank with connected coolant hoses -1- to -3-aside.
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Remove bolts (arrows) on left cylinder head.
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Disconnect 4-pin connectors -4- to -6- on ignition coils.
NOTE: For further testing, the multimeter is attached to an ignition coil connector.
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Connect multimeter as follows to measure voltage.
Connector
Measure to
terminal
1
Engine ground
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Switch ignition on.
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Specified value: approx. battery voltage.
If specified value is not attained:
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Switch ignition off.
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Pull off rubber seal of plenum chamber cover.