I recently just bought a 2011 Toyota Camry automatic transmission with 165,000 miles from a private seller.  I had the car inspected by a mechanic before purchase but a few days after purchase the passenger doors do not unlock. Only the driver's side door unlocks either by pressing the button on my key fob or by pressing the unlock button inside. If I manually open the passenger doors, the only function on the key fob and inside the car that works is the locking function. I am very confused as the car only unlocks and locks the driver's side door and only locks the passenger side door. I have already tried to read the owner's manual to reset the key functions but none of them seem to work. I am also aware that pressing the key button twice should unlock all doors but this does not work either. Any information regarding this matter would be extremely helpful.