Quote:
Originally Posted by TheyH8n
...have had the increased battery discharge a couple times when starting the car. Last night
I noticed the start/stop button light does not goes off. Not after 16 minutes not after 6hours.
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As others have stated, when either P Gearshift Light or START button remain illuminated after more than 30 minutes
(depending upon whether locked or NOT), then one or more modules is NOT entering "Sleep Mode." INPA or ISTA
will provide Fault Codes and other "Stored" diagnostic information related to "Quiescent Current" or draw when system
should be asleep. It would be foolish to throw parts at it without having a shop with INPA/ISTA, who knows HOW to
use it, do 15 to 30 minutes of diagnostics.
Attached are 2 pages from BMW Training Manual, "e90 Voltage Supply & Bus Systems", pages 41 & 42, which describe
how the system is SUPPOSED to work, and what diagnostics are available using INPA/ISTA.
George