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Don't read too much into that. I've been down the rabbit hole with charging. These vehicles are too electrically smart for its own good. The PWM alternator will get signals from the BCM and when working properly it will "SAVE" your battery from overcharging itself by maximizing charge levels up to 90% and NEVER 100%.You may be right. Either battery or alternator is what I'm hoping. I do notice that the volts on the display by the speedo have always shown under 12v. Right now it says 11.4v. Check the battery with a meter and it's 12.2v. Engine off.
Interesting you bring this up. I just read that you should never charge the battery with the posts as it will bypass the bcm. Also I don't know who put this battery in. So I unhooked the battery and am charging it now. When charged I will let it sit for 1 hour. Then I will hook it up and reset the bcm with the gap tool. I know for a fact that I have charged the battery on this truck the wrong way. Hopefully this will help. I will report back.
Thanks for the link. Interesting theory. My Land Rover service manual is only for 2009-2011. Maybe the manual for the 2012+ discusses that, I haven't been able to find it online. It does seem odd that I can't add a charged battery w/out telling the system or it will malfunction.Right here.
Very often, Land Rover Discovery 3 and 4 have been reported to have battery problems.The Discovery is relatively sensitive to battery voltage and a low battery voltage can even lead to a variety of obstructive error messages (HDC, ABS, suspension, etc.). In addition, the factory installed auxiliarwww.expedition-parts.de