Check for loose or worn serpentine or drive belts.
Sounds like a loose or worn belt, alternator or fan tends to do that when they get worn or loose.
It's probably the belt slipping. Check for belt tension. When an engine first starts the alternator works harder to recharge the battery. During that time, the alternator is harder to turn and if the belt isn't tight enough there can be some slipping between the belt and the pulley.
Check the serpentine belt, tensioner and pulleys. It's probably a problem with belt slipping.
F8
post
You can't turn on the ETS manually. It only comes on when the computer senses wheel spin. You should notice it coming on during a heavy rain or when accelerating quickly from a dead stop.
That would be during the POST (Power-On Self Test)
BIOS
Yes, during any period of increasing or decreasing speed it is accelerating.
Dash lights are supposed to light at startup so you know they work. The 4x4 is not working so the light won't come on other than at startup.
Yes, a company's founder may often be its CEO, at least during the startup of the business.
basic input/output system (BIOS)