10-08-2017, 09:12 PM | #7 | |
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Join Date: Oct 2003
Posts: 24,640
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So I still don’t get the battery thing. If the engine’s control computer is capable of reacting to the battery as it gets older, there shouldn’t be a need to “reset” it—if the car is reacting to the battery, it should react to a new battery differently than an old one, right?
The only way a “reset” switch makes sense is if the car has a linear map of some kind that it applies to battery charging. But that’s insane, since batteries wear at different rates depending on conditions. I think it’s a means of forcing you to go to the dealer for a new battery, pure and simple. EDIT: Ok, some googling yielded some additional detail: http://bimmertips.com/bmw-battery-re...ing-explained/ Here, the allegation is that if you don't reset the battery, the car will overcharge it, damaging the battery, because it will assume that the old battery is still in the car. But. Haven't cars had to deal with this problem since literally the day batteries were added to cars? Doesn't every car have to have a means of determining when the battery is charged, and not overcharging it? Why would the super fancy modern electronic IBS (which doesn't stand for irritable bowel syndrome in this application) be *less* able to do this than any other alternator? I will admit I'm not an expert on electrical systems, but this semi-plausible explanation raises more questions for me than it answers. EDIT TO EDIT: I'm with this guy. Quote:
Last edited by JST; 10-08-2017 at 09:28 PM. |
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