A-trac in 4lo on all 2016 4x4 Models Non Trd Offroad

By the name "electronic brake boost" I was thinking that the Offroad had some type of electric vacuum to help the brakes when the throttle plate is opened (dropping vacuum) and the other trucks didn't.... made sense based on the descriptions seeing how older cars relied solely on vacuum.

 

Not sure if trolling or serious. Traction control is the same as limited slip in 4hi (and evidently 4lo in 2016s). But A-Trac is more effective as explained in post #2.

Getting the TRD OR parts retrofitted and working right alongside existing VSC and ABS logic would be difficult and expensive. You could always install a vacuum pump, either belt-driven or electric, like Toyota used to do on turbocharged vehicles. The EV conversion crowd has been doing this as well: http://www.amphibike.org/index.cgi?page=pages/3_wheels/mr2/ev_powerBrakes

 

@mulkey: Can you check when switched to 4lo, is there a "TRAC OFF" indicator light or message shown in the dash? The owner's manual isn't too clear on this.

 

not this trac light ,but this is the light that flashed in 4lo when my brakes were pulsing. same light that blinks on my wifes 4runner trail in 4lo with a-trac. i have both lights on my dash. also saw a tacoma video on youtube where they were in hawaii testing 2016 tacomas and the toyota rep said all 2016 4x4s have automatic a-trac that you can't turn off. so i guess the bottom line is no need for yellow wire mods for 2016 and whatever its called its works for me

 

Until now no one knew the 2016 sports have "a form of traction control" in 4lo, and with all the experts on here no one can explain if it is trac, atrac, or lsd.. Just a bunch of vauge answers... Comming from people that are always right even when they have no idea

 

Pages 247 and 248 of the manual seem to be clear that auto LSD only works in 2wd and VSC is turned off when you shift to low range. So, the fact that auto LSD (1) works on all four wheels and (2) functions in low range is significant news.

 

Omg you guys

The ONLY models that have ATRAC are the Manual Off Road models. No other 2016 model has ATRAC.

The Off Road models have an electric pump built alongside the brake booster. This whole unit costs around 3500 dollars to buy or build from Toyota adding it to your vehicle would be a waste because any model except an Off Road will not have the computer software to effectively control the Traction control with that much power. I doubt it would work correctly in any of the LSD or TRACOFF modes.

 

Thank u the first answer that made any sence so far.

 

These trucks do not use vacuum booster brakes, they are electric. I don't believe antilock brakes use vacuum boosters as there is no way to switch brake pressure on and off when ABS is active.

 

To let you know, a usable form of traffic control did not exist on 2015 models in 4lo. We now have Auto LSD, actually called TRAC OFF, when in 4lo. TRAC OFF is Auto LSD in 4 wheel modes. Auto LSD is only called Auto LSD when in 2 wheel drive modes. You have to push the Traction control button to engage Auto LSD when in 2 wheel drive and it will turn off around 55mph I think.

VSC is always active... Even when you stop, press, and hold the Traction control button to turn "all traction control off", VSC is still running and it will fire off the Traction control system when it senses something far too crazy going on. This was proven when the guy who was scapchatting flipped his 2016...

Having all traction control off after holding the button will allow you to do a burn out in 2 wheel or drift in 4 wheel. It only hits VSC when it senses shit really hitting the fan

 

Traction Control: Brake limiting wheel spin when detected under acceleration using ABS technology.
Limited slip: Mechanically limiting the difference between right and left axle speed so you don't just set there with one tire spinning.
Locking differential: both axles locked together so both wheels spin exactly the same, effectively you have no differential.
A-Trac: simulates locking differential by electronically limiting one wheel from spinning faster the other using ABS technology.

Limited slip and locking differentials can be used indefinitely if necessary. A-Trac doesn't cause undo wear as long as both wheels are spinning the same speed. If A-Trac is actively working to keep the wheels spinning the same it will heat up the brakes the same as crawl control. Hope this helps.

 

Auto LSD in 4 low is inconsistent with the manual which says: The system can be used on 2wd models and in 2wd on 4wd models.

 

As far as I know, limited slip is not a switchable option. You either have a limited slip differential or you don't. I did not see a limited slip option on the Tacoma.

 

TRACOFF is AUTOLSD for 4 wheel drive.
AUTOLSD works in 2 wheel drive
TRACOFF works in 4 wheel drive modes.
They are the same system with a different name

 

No 2016 model comes with a mechanical LSD in any differential. They are all open diffs.

 

Vehicle stability control works by comparing steering angle, rate of yaw and speed. If these values compute that your vehicle is not going where you are steering, the VHS system cuts throttle and applies selective braking to bring the vehicle back in line with where you are steering. In 4 wheel drive the front and rear drive shafts are locked together by the transfer case so there is always some slip when cornering as the rear wheels track a slightly different radius then the front, therefore VSC is usually disabled in 4 wheel drive. I believe our trucks allow enough slip before engaging VSC that it stays on when 4WD but is disabled in 4LO. Traction control and VSC are two different things.

 

VSC is a form of Traction control.
AUTOLSD is a form of Traction control.
TRACOFF is a form of Traction control.
Crawl Control is a form of Traction control.
MTS is a form of Traction control.
ATRAC is a form of Traction control.

This truck does not have a system called traction control.

 

You just said it has traction control then it doesn't. I am more interested in defining these systems and understanding how they work. I do think if you get on ice and try to spin the wheels, traction control will limit the spin. You are a teacher. Aren't you interested in how these systems differ and how they work???

 

Please ask me a question.