To understand OBD II adapter and various applications that
use it a few published papers were studied. An OBD-II adapter
is used in vehicle diagnosis program [1] includes navigation
system and it is used to diagnose the various kinds of vehicle
malfunctions that can occur. An OBD II adapter which
transmits diagnostic data from ECU to the navigation system
is used. It transmits data using Bluetooth wireless
communication protocol. Multimedia and geometry
information services along with enhanced services are
provided to the users.