Discovered today that the sunroof will not open either. So it sounds like whatever controls both unlock/lock switches on the doors and the sunroof control is tied together.

Forgot to mention, the lock button does not lock or unlock the doors either.

The key turns left to right without any problem. I'm assuming the battery is fine given he's had no other problems starting etc. I'll take the battery to Auto Zone to get it tested today.

My son drives a 2001 V70. Right now you can not use the key to lock or unlock it which means it isn't secure to go places like his school. You cannot use the switch on the inside either but even if you could lock it, there would be no way to get back into the vehicle. A local repair facility thought ...