What happens when I turn switch to 4WD?

well that's just South Carolina for you.

 

You sir drank tiger blood. Winner!

 

1. 4wd ECU gets input from 4wd switch telling it to go to 4wd mode (blinking 4hi light goes on)
2. 4wd ECU sends power input to the motor ADD on front axle. its momentary so motor turns and then switches off when reaches max position . this is to constantly put pressure on the spring.
3. Once splines align and ring locks front axle. Position switch in ADD tells 4wd ECU that front engaged.
4. 4WD ECU now activates 4wd motor in transfer case. its momentary so motor turns to put the tension on the spring to move fork inside the transfer case.
5. Once splines lined up 4wd gear moves into the 4wd position. 4wd switch tells ECU that 4wd engaged (4hi light goes solid)

...or something along the lines

 

Thanks BlueT!
I'm a Mechanical Engineer by trade & I like to envision what takes place.
It also helps to know when you have trouble.

 

and you just came up with that on the spot? that was pure genius. you have captured all that is off roading!!!

 

I hear ya. I dont like magical things either so spend time to learn.
Key items to remember is none of the motors are directly connected. Rather they expect spring tension to do the work. ECU expects input from switches on ADD and transfer case to tell it when either is in lock or unlock position.
Going off the 4wd is pretty much reverse order 5 ....1
4L only pushes fork into extra position but it does not touch front axle.

 

You sir are a man among men!

 

The word Genius comes to mind when reading this! +1

 

That was awesome

 

its too bad it took 25 posts for him to get a real answer though. theres a lot of wasted space here lately. can we not stay on topic?

bluet youre the man !

 

My pleasure. I figured man deserves real answer. I am assuming once ATRAC gets mentioned we will reach 20 pages in no time

ooops I did it again

 

At least it was positive good natured wasted space instead of nasty comments we see so often.

 

I don't know what you're talking about. Every time I "turn switch to 4WD" that happens. If it doesn't for you ... you're pushing the wrong button.

 

ok you got me there lol

 

You sir are quite correct!

 

theres a fact. second one in this thread

 

Would be nice though if people kept offtopic to minimum you know or at least allowed answer at the beginning.
Litteraly when you read a lot of topics it seems people are so into the mods and dont get laid or something.