A system and a method for diagnosis flow for a read-only memory (ROM) includes determining whether a window of the ROM is faulty, based on a pre-computed signature and a computed signature corresponding to the window. Based on the determination, the size of the window is reduced to form at least two reduced windows. It is further ascertained whether the at least two reduced windows are faulty based on pre-computed signatures corresponding to the at least two reduced windows and computed signatures corresponding to the at least two reduced windows.