M Reg Hyundai Accent 1.4 gsi?

My central locking has malfunctioned causing the passenger side door to remain locked. Cannot open from inside or outside. All other doors ok. How do I disconnect the central locking system so I can open door? I thought maybe pulling the fuse, but cant find it, thought it might be in the fusebox in bottom right hand corner of drivers side under dashboard.
Can anyone help?