The L322 Range Rover introduced in 2002 was originally full of BMW electronics, for which we have separate software modules. After being purchased by Ford however the company set about replacing these BMW systems with their own. The first changes occurred in the 2005 revamp of the model when the entire set of information and entertainment ECU's were replaced. The replacements are interconnected for data exchange by a fibre optic cable called a MOST BUS. This BUS is not connected to the diagnostic socket directly but through the Integrated Head Unit which acts as a gateway to a medium speed CAN BUS which is connected to the socket. To interface to some of the un replaced items such as the steering wheel switches, a special small gateway ECU was designed to work between the MOST BUS and the switches. In 2006 however, the changes went much further with a new instrument pack forming a gateway between two CAN busses as well as replacing the previous smaller gateways functionality and many other vehicle systems being replaced. Most notably the Petrol Engines were replaced together with their entire drive train and the electronics that go with it and the vehicle became a true hybrid mix of BMW technology doing some tasks while other ECU's all networked together by the CAN BUS did others. In 2007 in yet another revamp that even saw the dash board change and the TD6 Diesel engine was also replaced with the infamous V8 along with its drive train / electronics and even more systems were replaced or added such as Park Brake in the rest of the vehicle. These Systems in common with all later BUS based systems are so inter dependent that we provide them all together as one.