ABS on this truck is dangerous...

https://www.youtube.com/watch?v=MjoMQJf5vKI

 

The braking system was TOTALLY redesigned in 2011. You can tell by just looking at the Master Cylinder... it has a lot more connections on it compared to the 2005. On of the things they supposedly fixed is that it prevents unintended acceleration when braking.

Yes, the '89 was an Extended Cab pickup truck. It's basic design was used in later years when pickup trucks were branded as 'Tacoma'. I got tired of Toyota sales people asking if I wanted to trade in my '89 Tacoma. I would reply that it was older than a Tacoma. You can't please everyone!

The unattended acceleration problem is key to this problem. While I do not know if the vehicle was actually accelerating because of the engine, I do know that if the brakes release while you are in a panic stop, the vehicle will accelerate due to the forces of the moving vehicle (Newton's third law). The mentioned accident occurred on new, dry pavement and the vehicle had new Michelin LTX A/T 2 tires on it (traction A, Temperature B, Speed Rating S). There was plenty of distance between the two vehicles to stop, but it didn't! Also, there were absolutely no skid marks (I guess the ABS system thought it was working). There was either an unattended acceleration problem, a failure of the ABS system, or both!

Aside from the accident, the ABS system in the 2005 is faulty as described in the off-road adventure. I wrote Toyota requesting that they include an ABS Defeat switch in newer models that could be turned on in 4WD mode, but got no response. I later found a mod on this forum, which I used to prevent problems driving in snow and off-road.

As I said in my last post, the 2014 ABS system is working better, but it (may) still have problems. The Owner's Manual states that ABS is NOT designed to make your vehicle stop faster. As many have said, what is it good for?

 

allows you to steer while braking.

 

Yep. Steer right into the back of that car in front of you in the snow.

 

all you people bitching and moaning.... just disable it if you dont like it. Took me about 20 min to wire up the abs kill switch in my truck for on the fly full abs / traction control disable. Then you have best of all worlds.

 

No kidding. That doesn't negate the fact that they are touchy. That's what this thread was about.

 

WTF? Go back and double check your physics book. on a flat surface, dry, wet, ice, whatever, releasing brake pressure cannot in any way, shape, form, or fashion ACCELERATE a vehicle. An additional force would have to be applied. It can no longer slow down, but it will not INCREASE it's speed on a flat surface.

As for the second part in bold, if you read through the thread, and others like this, the purpose of the ABS system is to aid in the driver having maneuverability, so that they can possible steer around an object while braking, or keep from skidding totally out of control.

 

Never seen so much misinformation in a thread like this one. You have no clue what your talking about and to say it accelerates...did you even graduate high school....you should stop spewing misinformation...and BTW the ABS is to help you maneuver in a panic situation... People who hate the ABS don't know what it's for.

 

Says a guy from NV
ABS is for dry, maybe little wet conditions with plenty of room around obstacle .
ABS..... WILL NOT SHORTEN YOUR STOPPING DISTANCE!
ABS..... WILL EXTEND YOUR STOPPING DISTANCE.

Ability to go around obstacle is crap when you driving on narrow, winding roads, with snow coverage, Roads that are surrounded by the trees.

I would take shorter stopping distance over ability to maneuver, anytime.
In fact if you going down a slippery hill, with ABS you are unlikely to stop at all. (regardless of vehicle)
The fact that people think ABS is great shows that either they don't know what it is, how it works Or they are weekend drivers that had never drove in bad conditions.

 

Install LSD in the rear axle if you have non- Ofrroad truck, problem solved with geting it go.

 

What LSD you installed in the back ?

 

In general, ABS decreases stopping distance on dry surfaces, compared to non-ABS, while it's the opposite in snow or rain. So, it's pretty much always better to have ABS on dry, but if you have to do an emergency stop in snow, then the ABS is only good for keeping steering control during stopping, significantly increasing the stopping distance.

 

Actually, by Newtons third law if you release the brakes on a flat surface you wont accelerate at all! Newtons third law has nothing to do with acceleration! There's actually a whole bunch of friction forces that, under Newtons second law, will cause you to decelerate! (albeit at a slower rate than with brakes applied).

What he said ^

What will happen is the rate of change (derivative) of acceleration will be positive as you go from braking to coasting. This is called "jerk" and may feel similar to the sensation of accelerating from a stop light (which is similarly a positive jerk). Fact is though, you're just accelerating at a less negative rate.

 

The early 2nd gens like 05-08 has pefectly working ABS. I think the 09+ with tons of electronic nannies are the ones with the strangely behaving ABS.

 

I disagree. I am quite fond of ABS systems, and they work great when designed properly. Toyota just did a shit job with theirs on the Tacoma. I am pretty sure I know more about ABS systems and how they operate than you are. Just sayin.

Actually if you look at the information on all of the manufacturers, they even state that ABS can increase your stopping distance, even on dry pavement. It just allows you to have better control.

 

I'm pretty happy with how my '13 ABS works, and I drive in the snow and ice a lot.

 

When braking on ice, my experience with the Tacoma's ABS is that it does not necessarily give increased control. When the surface under the tires lacks resistance there is no steering as there is nothing for the tread to bite into and subsequently no increased control coming from the activated ABS. I could see this becoming an issue if one were to rear end someone or slide uncontrollably into a busy roadway. In cases like this it seems to me decreasing the distance to stop is paramount over the ABS function.

 

amen brother

 

Work great? ABS purpose is to prevent lock up of wheel during breaking. That is what it does. There is nothing else there. No magic. All it does it relives pressure from brakes when you press hard on them.
Problem is this not what you want in bad conditions, that also means less breaking power traveling to wheels, and increasing stopping distance.
Trade of supposed to be ability to control vehicle. Again control is mute point on the narrow road, snow/ice covered with trees all around.

Not sure what is your experience with ABS in bad conditions but I had been driving in snow/ice conditions for very long long time. I drove cars with out ABS. So tell me what I am missing here?

 

I ma giving bamatoy benefit of the doubt. I think because he is FL he has little experience with ABS in sleepery condition.

It will be mind boggling for some but today was snowing over here and I took my CR-V which has no ABS and No Traction control to work.
ABS and Traction lovers would be relived I had no problem traveling down the steep snowed hills .
Why did I chose my CR-V over my Tacoma. Because I was too lazy to pull ABS fuse and my CR-V gets 23 MPG with 4wd in winter.