My girlfriend recently got a 2007 xc90 awd 3.2. Now that we have a little snow already in Minnesota now we realized the AWD isn't working! I have read about the collar/sleeve that strips out, the DEM module, or a yaw sensor but I'm trying to narrow it down more if possible. We put the car on my brother in laws hoist and put it in gear and only the front tires spin. The driveshaft is spinning all the way to the back but nothing in the rear diff seems to be turning. I also jacked the rear of the car up and tried to spin the driveshaft by hand but could not. So I have read that it doesn't sound like the collar is stripped after those tests?? When the front tires spin in the snow the traction control light flashes on the dash, otherwise there is no other lights or anything that occurs, and it only flashes while tires are spinning/slipping. Any info or help would be greatly appreciated!

 

I have the same issue. Did you have any success?
Jarvis