My X6 50i won't start

[Skyline]

Originally Posted by jsoto

Bawareca -

Can you shed some more details per the article I linked.
I mean 14 volts aside, why does the registration etc, need to be acquired. CCA, etc. That's purely for the role in starting the engine....why would the vehicle know that in order to charge the battery. Isn't it's role it to just charge it to 14.7, aka, AGM voltage specs...

You don't actually put in the CCA when you code the battery. You use your scan tool to tell the car you are changing battery, and if you are changing the battery type, (ie. AGM vs Acid), and if you are putting in a battery with a change in Amp Hrs. (ie 92ah vs. 90ah). The scan tool will register the date of the battery change in the car's memory. From that point, I'm not sure if the scan tool evaluates the new battery, or the car evaluates the new battery, (my guess is that it's the car,) but the process happens automatically, you don't need to enter the data of the new battery, just whether it's different or the same. And you're done....1 minute or less.

But the car's computer controls the charging process of the alternator in a way that is specific to the type and power of the battery, along with its age.

[bawareca]

Originally Posted by Skyline

From that point, I'm not sure if the scan tool evaluates the new battery, or the car evaluates the new battery, (my guess is that it's the car,) .

Correct.
Registering the battery is erasing computer adaptation. Once new battery is installed the computer will evaluate it's behaviour for a few cycles and then will charge it according to the programmed data (battery type and capacity,i.e Ah) and the adaptation data. Later in the life of the battery it may keep 15v or more in order to keep the battery in the highest [possible] charge state.