Last post on Aug 21, 2013 at 5:16 PM
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Toyota Sequoia, Toyota Highlander, Toyota 4Runner, Toyota Land Cruiser, Toyota RAV4, Toyota Tacoma, Truck, SUV
#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.
#2470 of 2493 Re: Highlander and RAV4 [reneeg1]
Jan 09, 2012 (5:41 pm)
Squirrels are agile creatures. Most of us would prefer a large squirrel in snow.
#2471 of 2493 Re: Highlander and RAV4 [vavavavolvo]
by kyfdx@Edmunds HOST
Jan 10, 2012 (4:19 am)
And yet, squirrelly is a negative attribute, when it comes to vehicle handling characteristics...
#2472 of 2493 Re: Highlander and RAV4 [reneeg1]
Jan 11, 2012 (9:11 am)
Yes, about all you get with an HL F/awd is that emblem.
The HL uses three fully "open", free-wheeling, diff'ls, front, center, and rear. The only time you will hav decent 4WD functionality is when all four tires have roughly equal traction......a whole lot of good that is.
One wheel/tire loses traction and limits the engine drive torque to ZIP, ZERO.
As of 2010 the RX350 adopted the new Venza F/awd technique, not as functional as would be the Honda/Acura SH-AWD system, but a substandual improvemnt none-the-less.
In the class/price of teh HL look to the 4runner, R/awd, for a much more functional AWD/4WD system
#2473 of 2493 Re: Highlander and RAV4 [reneeg1]
Jan 11, 2012 (9:56 am)
Highlander has very effective AWD system that had proven itself to pretty much every HL owner. wwest never owned or rode a HL but has his own, not shared by anyone home grown conspiracy theories about Toyota AWD implementation in HL.
HL doesn't have any switches to engage AWD, it on all the time. Use common sense, make sure that your tires are good and suitable for snow/all weather driving. If road really icy and slippery then no AWD in a world will compensate fully for hazardous road conditions. I own 2008 HL and really like 'snow' button functionality under heavy snow. It changes transmission shifting points so car feels more steady when accelerates on the snow.
#2474 of 2493 Re: Highlander and RAV4 [luckyseven]
Jan 11, 2012 (5:53 pm)
Yes, I do not own an HL, but I do own the exacting(***1) equivalent, a 2001 F/awd RX300. Previously owned a 2000 F/awd RX300 which in retrospect I wish that I still had(***2). Due to pretty severe transaxle stress problems, premature failures, with the '99 and then less so the 2000 this early, more functional, F/awd system was abandoned. Those early failures proved to be the result of the rear drive being "automatically" engaged via the use of a VC, Viscous clutch/coupling design used to "lock" the center diff'l.
By the time the HL went into production the F/awd functionality had yet again been lobotomized, the VC was eliminated entirely.
"..home grown conspiracy theories..."
For years now, 10 or so, I have paid the substantial annual subscription fee (techinfo.toyota.com) for full and complete access to ALL Toyota, Scion, and Lexus models. The information I publish here is derived directly as a result of my access to the appropriate factory service/shop manual set.
If you suspect otherwise the daily access fee is quite affordable.
"..it on all the time..."
Pure BS. Anyone with even the most basic knowledge of AWD systems will understand that this just simply cannot be the case. Driveline components would be overstressed, so overstressed, that component failure would result within ~50 miles. Even "partially" automatically engaged, or even "part-time" automatic engagement is proving, right at this very moment, to be a problem with all reasonably functional F/awd system...the best of the best, the SH-AWD system, for instance.
"..it on all the time..."
No, it's ENABLED 100% of the time. The HL's F/awd system only activates AFTER-THE-FACT, only after FRONT wheelspin/slip is detected via simultaneous monitoring all four ABS "tone" wheels. And while one might think that the process of Trac activation would involve quick drive coupling to the otherwise "free-wheeling" rear tires. But due to serious safety concerns unique to FWD vehicles that is not the case.
The first action taken via Trac activation will be braking of the front wheels in order to most quickly restore front traction and thereby alleviate the otherwise strong possibility of loss of directional control. To facilitate even quicker front traction recovery and to prevent overheating of those front brakes should the driver not quickly release the gas pedal the system will also automatically and simultaneously FULLY dethrottle the engine.
Many later models, including the HL, using a F/awd technique of this type now have a Trac/VSC disable system so the driver might often have additional resources to get unstuck or initially moving forward on a slippery (uphill) surface.
***1 My '01 F/awd has an absolutely USELESS VC mounted across the center diff'l, purpose being to automatically "lock" the center diff'l under conditions of consistent wheelspin/slip. So useless that it was dropped entirely from the RX and HL with the advent of the RX330.
***2 My '00 F/awd RX300 not only had a fully functional VC, Viscous Clutch/coupling, it also had the then optional rear mechanical diff'l. I traded up to the '01 to get HID and VSC not realizing that I was giving a more functional, MUCH more functional, F/awd system.
#2475 of 2493 Re: Highlander and RAV4 [wwest]
Jan 11, 2012 (6:11 pm)
You have wonderful theories but they proven to be baseless. Read actual HL owner experiences here
We've been around this number of times. Just stop posting your useless technical mambo-jumbo and drive a HL in a snow for a change.