The Automatic Temperature Control made By Nippon Denso and fitted in the Discovery series II. This self contained dash mounted module is a strange addition in a Land Rover vehicle. Japanese ingenuity and technology make this a simple looking box with a few buttons on it and a simple LCD display does everything itself by pressing the buttons on the panel in a special sequence it can be made to perform a self test and display a list of stored fault codes. Available as an upgrade, ROVACOM LITE gives all of the information that you could ever wish for about the unit, its connections and what each and every fault code means. It gives examples of causes and solutions, resistance values and much much more. Fixed faults are automatically deleted from the memory of the ATC.