audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 550 > < With Manufacturer's Scan Tool
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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.

With Manufacturer's Scan Tool|Page 550 > < With Manufacturer's Scan Tool