A6 V6-3.0L (AVK) (2004)
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Disconnect harness connector at Clutch vacuum vent valve switch -3-.
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Connect multimeter at switch for resistance measurement.
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Specified value: approx. 0 Ohms
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Depress clutch pedal.
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Specified value: Infinity Ohms (no continuity)
If specified value is not obtained:
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Replace Clutch vacuum vent valve switch.
If specified values are obtained:
Checking voltage supply
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Connect e.g. V.A.G 1527 B voltage tester as follows:
Harness connector
Measure to
Terminal
1
Chassis Ground (GND)