Mitsubishi Repair: door lock, side switch, window switch

Question
The door on the passenger side won't unlock when the unlock door is pressed from the driver side, while the other 2 at the back work.What's wrong with it?

Answer
Danny,
The window switch panel on the driver side is a junction for all the other window controls.  If the passenger side window switch is working ok, then that means the driver side switch panel is faulty and would either need to be fixed or replaced.  If the passenger window does not respond to the passenger side switch, then that switch or regulator could be malfunctioning.
Good luck!