On a 2WD RAV4, the spinning front wheel is locked by braking and you can move (simulates a locked diff). Now, if both are spinning on ice or grass, you are stuck.That lifted front wheel just spins. Does the traction control brake the spinning wheel at all
On a 4WD RAV4, because there is no central differential, braking one wheel is OK, but braking two opposite axle wheels, with different speeds on the remaining wheels, will just lock the driveshaft. So, in my experience, Toyota doesn't do it. I think it will brake ONE wheel if it loses traction, but not TWO (have not tested this).
Highlander and Sienna have an open central differential and can apply brake on any wheels that lose traction:This is a split of 55% front drive and 45% rear drive. It is disconnected at speed above 25MPH or by use of braking.
Full-Time 4WD/AWD All Wheel Drive Sienna and Highlander gas System This systems sends variable power to both axles. It incorporates the front differential, center differential and transfer case into one compact unit. Rear differential is located at rear axle. Operation AWD system relies on a specialized Electronic Control Unit (ECU) to control wheel spin by applying the brakes to that wheel therefore directing power to other wheels with traction. Benefits This is a light duty system that allows a vehicle exceptional traction at all times while utilizing all the features of VSC and TRAC.
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