Do not take this personally, but it would be rare I would take anything said on an anonymous website personally.
I don't think I am underestimating these systems all that much. These systems are miles past points, condensors, carbs, etc. I was amazed at what vehicles just a few years ago were doing, my 2015 is even more amazing, and the 2017 have a few more nice features.
No problem here.
You can believe what you like but I know if you dig into this you will find out different.
This is not about me being right but just correct info getting passes around. So much bad info is out there and I see so many people pay the price for it.
I had a customer today that was upset his programmer on his car did not adjust shift points. Well the unit is not able to do it but that is not what someone on the web told him. Now he is out $400 because he did not dig in on his own to gather all the needed info. He was a good mechanic but he is a little behind on the new things and thought he knew what he needed with out checking.
That is all this happens way too often.
Alternators do charge well to Handel most things but if the battery is not there to support it the computer takes over and shuts non essential things down till it can no longer support the vehicle operation. Aircraft have done this for years and now cars do.
If a battery shorts out you may not even get it to jump start just as I saw this week.
All I ask is that you look into this as what you know is not in play much anymore. I run into this myself often when I think I know what is going on with a system but only to find out things have changed. It also is tougher and tougher to keep up.
A good mechanic today is a humble mechanic.
Another example was a dealer mechanic with 3o years was mad as he thought we sent him the wrong crank. It was a stroker crank and it was hitting the block.
Well he had the wrong crank and I asked if he had clearances the block. He said he did not have to do that. Well I explained you added more stroke. And it has to go some where.
He said how long he worked at the Chevy dealer and I said that is fine but he was building an engine GM never sold. Once I got him to think he realized what he needed to do. He was a good wrench but now he was reengineering the engine.
We got him to do a little more work and he ended up with no. More issues and a great engine.
My comment of what have you done lately is not to be a smart a$$ but just a note you need to really keep up anymore. I do many tech classes and read much to just keep up. Even then it is still not enough