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Join Date: Oct 2015
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Strange issiue alternator/battery
I have a strange issiue with my beast, I have not found this issiue on the board when searching.
The issiue is that, if car has been staying for 1 week for example, when I go and start up the car, the charghing voltage drops from 12,5V down to 11-11,8V and stayes there until I get many error on idrive. Like EDC fault, battery fault, steering wheel fault, maaaany more fault. if I wait that long until the error pops up on idrive, if I shut down car, and try to restart the car. It does not have much juce on battery to start up the car, it just flickers.
Anyway, if I don't wait for the error codes on idrive, insteed I restart the car after the car has been warm. The voltage then is 14-14,4V and stayes there perfect.
The issiue with droping voltage is only if car has been staying maby 1 week and more. This strange phenomenon pops up with dropping voltage.
The voltage does not go up after a first start up when staying, it can even drop more under 11V.
I hope you members understand my issiue, and maby can have been experince. I have asked some people, and they say it is normal. But I don't think it is.
Like I said, hope you understand my bad writing.
M5 e60 Sepang Bronze. MDM - 500 sport. 5th gear speed