A6 Quattro Sedan V8-4.2L (ART) (2000)
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Allow brake pedal to return slowly to its normal position.
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Both readouts should return from 1 to 0.
If one or both of the displays does not change from 0 to 1:
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Check voltage supply.
Checking voltage supply
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Remove storage compartment on driver's side.
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Disconnect 4-pin harness connector on brake pedal.
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Connect multimeter (voltage range) between the following sockets on the connector:
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Switch ignition off.
4-pin connector on wiring
Specification
harness, socket