3rd Gen Traction Control Modes Explained

It's TRAC and yes it is very good at doing it's job. These systems have indeed become very advanced in the last few decades. The system as a whole is on par with ABS in terms of driving assist systems. Stability and Traction control, if not already, may become mandatory for all manufactured vehicles just like ABS did.

 

WHY is there NO mention of the quick push in H4 in this otherwise good paper ????

 

Haha sounds nice. Part of me wants to move out West so maybe one day.

No kidding. When I first started reading that I was like "holy shit, here we go, this is gonna be it" and then it just left it out completely. I was disappointed lol

 

The Toyota Traction Control Gods are Toying with us, from atop Mount Fuji!

 

I understand that, but it doesn't make sense if you think about it. Aside from the lights that are on/off at 30mph, what good does VSC do you at a crawl? I don't see shit going crazy at that speed. And also why is trac off <30 and on >30. Just seems back asswards to me. 4hi-auto LSD would have made more sense.

 

I don't necessarily disagree with your logic. Is what it is though. I would trade that mode for 4Hi ALSD that operates the same as 2Hi ALSD but that's not what we got or so everything seems to indicate at this point. By all means, prove us wrong if you can.

And I'll add that it does make sense if you take it at face value. When you compare it to 4Hi ALSD it maybe leaves a little to be desired.

The purpose of that mode is explained by Toyota.

If TRAC is failing to get you out because it's cutting to much power, you turn it off and try to rock the vehicle free with unlimited power open diffs. That makes perfect sense. VSC is not left on to help out. It's left on because there's no reason to turn it off in the above scenario and Toyota would rather you still have it on. If you don't want VSC on you have to stop the vehicle hold the button down and turn everything off.

 

BINGO!!

 

Maybe we can reprogram the ECU...

 

Haha at one point I considered asking the Orange Virus guys to dig into the traction control logic. The definitive answers to all of our questions are inside the firmware of the ECUs. Too bad it's not worth the time it would take.

 

There were requests for OVT to look into a 2Lo mod also, along with killing rev hang and working on improving the engine braking in the OVT MT thread. There was never a single comment back about any of those.

I hope that some brave soul would try out Up2NoGood's 2nd Gen module on a 3rd Gen. There is some discussion about that.

I have wild dreams about a 2Lo button right in the center of the 4wd selector (3sec hold of course).

 

2Lo would be excellent. Would be the perfect remedy for the rather tall reverse gear in manuals. Call me crazy but I would also like to lock the rear in 2WD. This is dangerous though. You'd absolutely have to turn off TRAC and VSC before doing this or you could potentially destroy the rear end.

 

Exactly. Reverse is wayy too tall. First is a bit, just because my garage is tight.

I wouldn't mind a lock rear, but Auto LSD and 4Lo TRAC has me covered for now. You would think that taking the 3mph limitation off for you would be easy-ish.

 

4LO TRAC

 

I don’t see this logic. If the rear is locked and you apply brakes to one side won’t it just brake or slow down both tires. And also if both tires are going to same speed would TRAC Evan kick in, vsc might fire off it you were hooning it up.

 

OV said that all ecus have crawl control in there programming. I pretty sure he could change some settings for traction control.

I’m happy with TRAC for now but there is an arb rear locker and a twin compressor sitting on my workbench waiting to be installed. It will be interesting to test out TRAC with the locker locked and watch it work on the front tires.

 

Hopefully someone finds out we have ALSD in the rear and TRAC up front!!!!

I doubt ALSD all around. But that would be bad ass.

 

It is an established "known", ALSD (AUTO LSD) is a 2WD (ie. rear) traction enhancement. It is also established that TRAC is on all 4 wheels in 4WD HIGH, not just the front. Nothing new to find out.

What is in debate, or was in debate, is if there is TRAC without engine regulation in H4. This was called TRAC OFF for 4WD 2nd Gen owners. The latest research by Doggman is there no longer is a higher level of TRAC in H4... and that is really sad, if true.

 

I agree with everything you said but if for whatever reason either of those systems did grab one of the rear tires in a high force situation it would put a load of stress on the locking mechanism itself and potentially break it. I think this is why Toyota deactivates A-TRAC after 3mph with the rear locker engaged.

Edit: and it's why ABS is disabled anytime the locker is engaged.

 

Let me put it this way. Take it or leave it. Because I think TOYOTA left the 2nd Gen. behind the times.

I have a strong feeling the light doesn’t come on for a reason. Can you imagine how stupid someone would get, possibly hurting themselves doing something crazy in 4LO with ALSD engaged? If you’ve messed around at Azusa in their mud fields, then you know what I’m talking about. Perhaps they included engine regulation or VSC. I keep saying it reminds me of the safety sticker for the rear locker for some reason man and I just can’t put a handle on it.

AND I ONLY SAY THIS because of the stories I have read about here and what I experienced. Do you honestly believe theChief86 pulled out a locked duramax using TRAC only with snow and ice on the ground...up a steep hill? If it is TRAC only, then that system has changed and is way more complex than any of us can imagine. Take time and STUDY PB’s video. I love rooster tails when I run my hotsaws and I’m lovin it on the Taco too.

Oh I agree, wishful thinking. But us SR guys... better be careful what you wish for :0)

 

To be honest, I still think this never existed. I would need to see proof of this on a 2nd gen to believe it lol. I'm 99% sure it doesn't exist on 3rd gens though. As I've said the documentation, dash lights and real world tests from other members as well as myself indicate convincingly that it does not exist.