09 Audi A4 2.0 1.6 amp battery drain

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Posted to Technical Theory Forum on 4/8/2019 30 Replies

[2009 Audi A4, BATT/Charging/Starting Waveform]

When the Data Bus On Board Diagnostic Interface Module is disconnected, the battery drain goes down to near 0A. We tried a used module today, but the used module also draws the same amps, with the same weird a... Login to read more.

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