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      03-05-2023, 02:59 PM   #7
rogersmj
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Drives: 2016 340i M-Sport
Join Date: Jan 2014
Location: Indianapolis, IN

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Quote:
Originally Posted by Billfitz View Post
Something is eating power like Pacman. That, or the alternator output is low. With the engine running you should measure at least 13.5v.
After having it on the charger all night, here's my data from today:

1. Before engine start, battery reads at 98% charged (BimmerLink).
2. I remove it from the charger, and check battery voltage: 12.36V
3. I start the engine. No warning about draining while stopped. Bimmerlink reports 97% charged. Voltmeter reports 13.99 - 14.1V while engine running. Bimmerlink reports charge of 98% within a few minutes.

I let it run for 10+ minutes and then shut it off. No warning about battery being discharged (just the Emergency Call Malfunction, which I can't get to go away even with the new SOS battery).

It is now sitting in my garage not connected to the charger. The radio fuse is still pulled. Will see what tomorrow brings.
Appreciate 0