so yesterday, i unlocked my car to get something, and when i went to lock it, it didnt work.. and now the fob doesn't work at all? i replaced the battery with no luck. is there a fuse or something?! thanks 
There is a trick to doing it, Its in the manual. I had to do it once.
Im going from memory here but I think you get in car, close the doors,
cycle the ignition key from off to on 8 times until the car locks itself
and unlocks (click click ) then hit the lock button on the FOB right away.
Then it should work.