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Old 01-03-2019, 11:47 AM
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andrewwynn andrewwynn is offline
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Join Date: Jun 2015
Location: Racine, WI
Posts: 10,817
andrewwynn will become famous soon enough
I use a generic wifi obd adapter and dash command app for iOS but Android id use torque if still available

Not a lot of control over how long it will log but you only need to have a few minutes to show a voltage dip.

With fluke you can hook up and monitor min/Max as long as you want you won't get as much info as a graph but you only need to know if the min gets below 13.

In my case my oil filter o-ring seal leaked and got oil in my alternator. It coated the slip rings and simply made the alternator less efficient and when dropping from under power to coasting to a light it would dip to below 13v. Tripped the DSC light.

I've also had a loose abs sensor: that will trip abs almost immediately but will also reset each drive.

I have valeo alternator and there's a $20 kit to replace brushes and slip rings.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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