Last post on Aug 21, 2013 at 5:16 PM
You are in the Toyota Land Cruiser
What is this discussion about?
Toyota Sequoia, Toyota Highlander, Toyota 4Runner, Toyota Land Cruiser, Toyota RAV4, Toyota Tacoma, Truck, SUV
#2460 of 2493 Re: Toyota 4WD in recently models [wwest]
Feb 10, 2011 (11:22 am)
"F/awd system could be easily modified"
My 09 HL one wheel drive is nearly useless in the snow and I am wondering how one would go about modifying it as you described using a switch to over-ride the the clutch.
In your opinion would this help substantially or is it just wishful thinking?
I am pretty handy with a tool and would seriously entertain this idea, realizing of course (hoping really) that it would be like locking in a tranfer case.
#2461 of 2493 Re: Toyota 4WD in recently models [oldad1]
Feb 11, 2011 (10:15 am)
Sorry, but I was referring to the NEW F/awd system now used in the Sienna, Venza, and RX350. Those have an electromagnetic clutch just forward of the rear diff'l that is used to dynamically apportion engine torque to the rear drive.
In those a simple switch might be used to fully engage the rear clutch provided that there is absolute certainty of a non-tractive, slippery surface.
Basically a "part-time" 4WD system.
#2462 of 2493 Re: Sequoia, Land Cruiser and 4Runner [cliffy1]
Jun 24, 2011 (8:30 pm)
2003 Toyota Sequoia 4X4
Is there a way to override the TRACS and VSC system? I was heading up a muddy slope and it felt like the rev limiter kicked in and I couldn’t power up the rest of the way – it felt like it was trying to get traction and slowing the revs of the motor to do so.
Am I able to flash my ECU, pull a fuse, or snip a wire? Did I just buy a soccer mom taxi?
Thank you in advance for any insight or explanation anyone can extend.
#2463 of 2493 Re: Sequoia, Land Cruiser and 4Runner [donovancook]
Jun 25, 2011 (8:49 am)
In a true 4X4 if you lock the center "diff'l" that automatically disables TC and VSC. Sounds like in the conditions you had you needed to be in "locked" 4X4 mode.
#2464 of 2493 2011 Sequoia 4wd
Sep 23, 2011 (12:29 pm)
I am looking for a simple explanation describing the applicable conditions (when to use each and why) for using the (1) Auto LSD System; and (2) (when and why) to disable VCS or A-Track. This will sound dumb, but the Owner's Manual I think needs some interpretation to become clearer...Trac Off mode, Auto LSD mode, VSC off mode. Am I supposed to advance from Auto LSD to VSC OFF mode when I am trying to get unstuck, which I seem to be reading is a 2 -step process? Am I close to understanding this?
#2465 of 2493 Re: 2011 Sequoia 4wd [2000lc]
Sep 24, 2011 (8:47 am)
The base problem arises from the fact that selective frictional braking is used to implement Trac, LSD, and VSC. If a condition requiring consistent, continuing, selective braking were to occur and the engine not be automatically dethrottled you would end up with warped brake rotors soon thereafter, or possibly engine failure of the drive train due to the extreme stress involved.
Since the driver cannot be trusted to lift the gas pedal to the point of "feathering" when one of these modes activates the system does it automatically for you.
So the only method for getting unthrottled wheelspin as a last resort to get unstuck, etc, is to disable ALL of these functions.
#2466 of 2493 4wd won't engage on 2005 sequoia
Nov 14, 2011 (6:43 pm)
Ok, so I guess I forgot to turn my 4wd on once a month on my 2005 toyota sequoia. From what I read online it is in the owners manual. Would have been nice for the dealer to tell me that when I bought it. Now when I hit the button it just blinks on the dash and never locks in or changes. The dealer wants to charge 92.00 just to look at it. I read on this forumn about a fix for my back window (got the defrost and wiper working which is all I wanted, so thanks to all for that). Any idea on my new issue? Hoping there is a way to reset it or get it to engage without a dealer charge. I wasn't able to find anything online other than one guy who took it all apart and replaced a bunch of stuff. I am not mechanical but also not an idiot so I could do minor things.
Please help as winter is here in Wisconsin.
#2467 of 2493 Re: 4wd won't engage on 2005 sequoia [hankerkid]
Nov 16, 2011 (7:08 am)
It's sometimes easier for the 4WD clutch to "slip" into engagement accelerating, EASY acceleration, from a full stop, at a low speed, stopped, or even driving slowly, DEAD slow, in reverse.
It's even worse if you have new tires at one end vs the other.
#2468 of 2493 Re: 4wd won't engage on 2005 sequoia [hankerkid]
Nov 29, 2011 (6:48 pm)
I have a 2003 4runner 4x4 v6 and just went through an ordeal with this but don't dispair. The problem lies in the actuator that is within the transfer case. It along with the front diff actuator are 9vdc and NOT 12vdc. This actuator inside the transfer case drives a pin that makes the transfer case go into 4wd high and then into 4wd low. The actuator is 1200-1300 alone. Aparently this is a weak link on these vehicles. I also am looking at a solution to this issue. For now I have a 4runner with this issue. With a lack of use the pin inside the transfer case becomes gummed up in its housing and gets stuck in one position or another. Mine was stuck in the 4wd low and required removal and rebuilding of the transfer case to free this pin. Sometimes a tap with a rubber mallet can free the pin but this didn't work for me. Good luck.
#2469 of 2493 Re: Highlander and RAV4 [jmay]
Jan 02, 2012 (5:16 pm)
I am having the same problem... I have an 07 Highlander and the back has the 4wd emblem, however, there are no switches that indicate whether or not it is engaged. I recently had to drive through about 6 inches of snow, and I was all over the road, was kinda like riding a Squirrel. I also am not sure what the ect snow button does or does not do. When I had this turned on, the highlander was not any better driving in the snow.