I did it just for my fun. For donuts in the snow acutually.
I was looking around techstream and found the awd disable mode. Its on main paige. Click awd module. Then utility. Then awd mode set to prohibit. After turning engine off and on it goes back to awd on mode, so its temporary.
I also fully disabled the vsc with the pedal dance. because for safety it is disabling the first gear when trying to slide the car and forces to start in second for safety.
so first did the pedal dance then without turning car off did awd off in techstream. The torque vectoring diferential still works so both wheels are spinning.

You also get a error message so it feels more of a german sedan
edit: added techstream pictures.

 

My understanding is that we have an open rear diff, not a limited slip, and certainly not torque vectoring. There may be some kind of electronic tomfoolery using the brakes to slow a spinning wheel to push power to the other side, but the differential itself is just open.

 

Yes just electronics by brakes. After disabling all the electronics for stability and traction control the differential still works and both wheels spin is what I meant. Didn’t know how to name it. The torque distribution.

 

It says 2WD mode engaged, but from what I've recently read in the manual the center diff is always "active" meaning it will always deliver either a 30:70 F-R split, or 50:50. Not 0:100. This is due to the clutch pack inside it.

I think what you've done is made the center diff slack and allow 30:70 always, but when you spin the tires there's just ot enough umpgh to get the fronts to spin as the rear has already broke free.

I'd like to see a video of it playing to see what it's really doing.

Another question for you. Can you data log in Techstream?

 

I'm with you. Unless there is a physical disconnect, the transfer case is always connected and some amount of power will go to the front wheels. I'd expect it to be harder on the system with the large mismatch in torque if the rear is allowed to spin and the fronts to remain idle.

 

Have the videos will upload. Front was completely off/dead/disconnected. Will upload both awd on awd off. And the 3rd coolest mode for snow is actually awd on but pedal dance for vsc off. Because easiest to handle and smash the gas and not oversteer.

 

 

Awd off and vsc off was fun in that its difficult.

 

For better quality click on the name of the video to open it in the youtube app. Also there can set quality to 1080p to see how different wheels are spinning. On awd off in the turn the front wheels were free rolling and stoped rolling when back oversteered

 

Seeing that it’s completely off, the car has a clutch that is commanded by ecu. When ecu commands the clutch to be completely off the front axle is completely off.

 

Our transmission and transfer case is shared with other rwd based awd cars including IS, Tacoma etc. The rear axle is directly connected engine/transmission output shaft. There is no center differential and no clutches going to rear axle. Its direct connection. From the main shaft there is a clutch pack that can share some amount of torque from zero to fully locked Someone here says he read in the book that default is 30-70. It’s programmed to always have a little torque sharing after you turn on the car then. When rear wheels slip or when you manually enable snow button the clutch engages more, up to 100 or 50/50 so to say even though rear axle is alway directly connected.

 

here is a similar transmittion from a rwd based/biased awd sedan with chain transfer case like ours.

 

Seems like a very well taken care of car.

 

I don't know that the AWD is truly disabled. Based on these diagrams there is always some torque going to the front wheels, and the transmission output shaft is not directly connected to the rear driveshaft, but instead transmits power through an additional planetary gearset, where the transmission output shaft is the sun gear, planetary gears are used to send power forward and the ring gear sends power rearward. Front torque is controlled through clutches on each planetary gear, but they are hydraulically controlled and it appears that they cannot be fully disengaged.

https://toyota-club.net/files/faq/11..._ifour_eng.htm


This is a much more complex system than is used by Nissan/Infiniti as shown in the video above, where the transmission output shaft is fixed to the rear driveshaft and a single clutch transfers power to the chain and front driveshaft via a single electromagnetically controlled clutch.

 

When a clutch is 100% off its 100% off. There is no mechanical connection whatsoever. The front is completely disconnected even if there would be 10 center differentials and 11 people saying that white is black