H3 Traction Control Problem

[fourfourto]

If you apply brake traction is disabled.

[marin8703]

with the stab off in the DIC when I apply the brakes or step on the gas the tc kicks in. next time im at dealer i'll ask em what the deal is.

[smitham]

Got the truck back from the dealer tonight. It appears that one of the wheel speed sensors was bad. This made the computer think that one wheel was not going the same speed as the other 3 and then the computer took over from there.

[whaaaaT]

i dont have a locker. It kinda makes sense that your traction control isnt kicking on like ours is if you guys have a locker locked cause the wheel on the opposite side is spinning the same speed all the time now. Even if you spin both wheels are spinning exactly the same speed so hows it gonna apply the brakes to the slipping wheel? In the front your TC probly turns on a little but your moving damnit and im sitting there flooring it while my car crawls for some reason in sand. I've actually noticed that if i put it in 4 low i start off better but its no fun. I wanna throw sand around in 4 hi.

[tomp]

That's what I posted above

Originally Posted by smitham

Got the truck back from the dealer tonight. It appears that one of the wheel speed sensors was bad. This made the computer think that one wheel was not going the same speed as the other 3 and then the computer took over from there.

[f5fstop]

Originally Posted by tomp

That's what I posted above

And I posted before you, (As for the symptom. I have to check on something, but it could be a defective wheel speed sensor").

However, where is the original poster? I'm curious as to if the fix I told him about took care of the problem. Possibly, he won't be back until there is another problem?

[smitham]

So I thought things were all good when we got the H3 back last night. The dealer cleaned a speed sensor and thought all was well. As it turns out all was not good. When my wife took the truck to work (8miles) and then to lunch (4-5 miles) everything was okay, then when she was on her way home the mystery brake applier showed up again (she was going +/- 45mph down a major road 4 lanes each way and the truck just slammed on the brakes and applied traction control all at once). At this point I told her to pull over and call on-star and get the truck towed to the dealer.

At the dealership I was able to talk to our actual tech and explain everything (I also shared the info that f5fStop provided me). We plugged in the Tech II and scanned all the modules and found no codes, so we went for a drive with the Tech II attached to see if anything seamed wrong, well as luck would have it, the truck worked perfect. So now the tech is going to drive it tomorrow until it duplicates the problem.

[f5fstop]

Have the tech go to his computer and to TIS2WEB and download the new calibration that is available for the problem of ABS/TC unintended operation after a reverse maneuver. It can't hurt, and may be the fix.
Let him know there will be a bulletin issued on this in the next week. But the new cal is in TIS2WEB already.
Guarantee it won't harm anything, I have been running around for over a month with the calibration in the controller and all is well. However, I never experienced the unintended brake apply like you are. (I'm just the local Guinea pig with a 2006 H3 and the programmers all know that.)