How to turn off Atrac in 2004 LC100? (1 Viewer)
- Thread starter Sverige
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It will require some wire hacking. I posed this question a while back and the response i got was "why would you want to". After cooking my brakes on a hill climb, i'd like to be able to turn it off as well.
How do you "cook your brakes" going up hill?
the short is, you dont have the button. Why do you think it will help you not having it? If you go full throttle it turns it off as well and goes open open.
ATrac works with ABS system...the brakes are what stop and release your tire rotation hundreds of times a minute
Isn't the alternative not making it up the hill?
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Yukon LX said:
I think my recent problems of "no go" in deep sand may be attributed to Atrac. Maybe that's not it, but I want to turn everything off to start from basic if possible.
Sometimes I can floor it in drive or reverse and nothing happens. Wheels don't even spin. Zero wheel movement, the truck just revs. A number of people said it must not have been in low or high or in gear. Trust me, I got that. My buddy's FJ did the same thing in the same deep sand. When he turned off Atrac it popped right out and wheels turned. I had to dig and lay Maxtrax like crazy. Not as fun as blasting through deep sand dunes.
The most embarrassing part, my other buddy's completely stock manual Xterra on OEM tires drove he same deep sand effortlessly. Didn't even have to air down. Makes you think about all the mods made to my truck and which ones actually improve "go" when the terrain gets rough...
Anthony.L
Looking for the end of the road...
Then pop the drive side wheel speed sensor connector and find out real quick! Now a permanent or long term solution, but if you want to know if that's the issue...
Long term, you could wire a switch in the cabin that interrupts that wheel speed sensor turning it off momentarily. However keep in mind you have to turn the car off and back to for the change to take effect.
I've had the similar thing happen to me, but this was on a 2002 4Runner. VSC would engage while trying to pull out onto the main road (slipping on gravel), which made me come to a complete stop in the middle of the road with traffic coming at me from both direction. I had the thing floored with no power going to the wheels.
A friend of mine with a 2006 4Runner had a similar situation while we were camping. It was on flat ground, but in 1-2" mud. Floored gas pedal and nothing--he only heard beeping from the VSC. But unlike your situation, locking the center diff did the trick (which disabled VSC).
One important thing to note is that my truck nor my friends did NOT rev when the VSC was going crazy. The RPM's were at around idle and didn't go anywhere. I think you've got a different issue that's related to the transfer case.
A friend of mine with a 2006 4Runner had a similar situation while we were camping. It was on flat ground, but in 1-2" mud. Floored gas pedal and nothing--he only heard beeping from the VSC. But unlike your situation, locking the center diff did the trick (which disabled VSC).
One important thing to note is that my truck nor my friends did NOT rev when the VSC was going crazy. The RPM's were at around idle and didn't go anywhere. I think you've got a different issue that's related to the transfer case.
Applying the brakes disables the Atrac in all Toyota's with Atrac and even when the Atrac button is depressed (if so equipped).
Times when you might want to left foot brake are climbing a hill or leaving a parking space in ice, because this is when you might spin a tire and then find purchase. The theory here is this may break the diff.
I just had a conversation with Christo about this, as well. I always thought Atrac was a great feature, being a previous owner of an FJC and 4th Gen 4runner.
I don't think this was as much a concern with the FJC and 4th Gen 4runner I had because #1 they were newer 08/07 and #2 they were not V8s but v6s with newer components, less weight, less torque.
With that said, one of the things you would hear from time to time was someone blowing their front Diff on the FJCs. Maybe this is more driver error with too much power and the wheel cranked all the way to one side and a big rock in your tire's path.
The thing to be aware of here, is that 100s have weaker front diffs, more weight and more power. So it will take less to damage the front diff and A-trac may add to the potential damage if you are not extra careful with how you use it.
I would love a button to be able to turn it off...
Maybe we need to study an FJC wiring diagram, to see how the button is wired in?
Times when you might want to left foot brake are climbing a hill or leaving a parking space in ice, because this is when you might spin a tire and then find purchase. The theory here is this may break the diff.
I just had a conversation with Christo about this, as well. I always thought Atrac was a great feature, being a previous owner of an FJC and 4th Gen 4runner.
I don't think this was as much a concern with the FJC and 4th Gen 4runner I had because #1 they were newer 08/07 and #2 they were not V8s but v6s with newer components, less weight, less torque.
With that said, one of the things you would hear from time to time was someone blowing their front Diff on the FJCs. Maybe this is more driver error with too much power and the wheel cranked all the way to one side and a big rock in your tire's path.
The thing to be aware of here, is that 100s have weaker front diffs, more weight and more power. So it will take less to damage the front diff and A-trac may add to the potential damage if you are not extra careful with how you use it.
I would love a button to be able to turn it off...
Maybe we need to study an FJC wiring diagram, to see how the button is wired in?
never found a time I needed to disable ATrac....I have driven in sand, mud, up steep hills, etc. Light application of brake disables it as stated for slow speed movement such as ice....and 100 also has 2nd button for starting in 2nd gear only to help prevent wheel slippage due to torque, etc.
lots of people also dont know how to use ATrac...it requires constant throttle, not wide open, enough to keep rpms up...and then working steering slightly. I have had tranny get hot on long climbs before but never noticed brakes cooking. For the 1% of the time the ATRAC may not be ideal...I think I will put up with that possibility given all the advantages it offers.
lots of people also dont know how to use ATrac...it requires constant throttle, not wide open, enough to keep rpms up...and then working steering slightly. I have had tranny get hot on long climbs before but never noticed brakes cooking. For the 1% of the time the ATRAC may not be ideal...I think I will put up with that possibility given all the advantages it offers.
You make a great point here Brock on constant skinny pedal but not wide open throttle.
Just to clarify, you do have the center diff locked, right? Getting "nothing" when you floor it is your VSC not allowing any wheel spin. That is turned off when you lock the center diff. I'm sure you already know that, but with ATRAC activated you can still spin the heck out of the tires when you hit the gas. Hitting the gas slightly, you will feel and hear the ATRAC grabbing the spinning wheel which sends power to the other wheel.
Again, this may be all stuff you already know.
If your center diff was locked and you still couldn't get any wheel spin, you have other problems, not ATRAC problems.
Because there are times when wheel spin is needed/wanted,
Because i prefer less electrical nannies when i am wheeling,
And because i want to.
If you don't know how you can over heat your brakes on a long loose hill climb, then come meet me at super lift and i will show you (assuming you have an ATRAC equipped 100)
Because there are times when wheel spin is needed/wanted,
Ding, ding, ding! We have a winner! Sometimes it's nice to be able to lay a nice patch when needed and to build up some momentum.
then all you have to do is put down the skinny one to the floor and problem solved. Atrac will not stop you at wide open.
But it will stop you at almost wide open... and that's the problem. I like ATRAC very much and there are times when it may be advantageous over a locker, not to mention it came with the truck.
Climbing Truck Hill at Hollister comes to mind. I've made that hill many times but I've also been stopped twice. ATRAC wasn't the only contributor of not making the climb but it was a big factor. As I sped up the hill and the front wheels began to slip atrac did it's thing and killed my momentum. Causing me to reset my run.
I've been testing an atrac disable from the cockpit and I will share my findings shortly. If anyone else has input on the best way to achieve this result I'd certainly listen.
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Resurrect! I just got back from the Bridgestone winter driving course in steamboat springs. Work sent a bunch of us. Way cool, try to get Lea
While we weren't in a 100, we had three different brand new Lexus' They had installed in each vehicle one switch that turned off all nannie systems, vsc, abs and atrac.
So has anyone figured out our 100??
While we weren't in a 100, we had three different brand new Lexus' They had installed in each vehicle one switch that turned off all nannie systems, vsc, abs and atrac.
So has anyone figured out our 100??
