The wiring diagram comprises nine individual wiring diagrams. They are subdivided into coordinate fields. Each individual wiring diagram comprises a part of the central electrical system within a dash-dot frame. This part of the central electrical system shows all the lines and relays required for individual wiring diagram. The ground-connecting points are designated with “MP” and their location is shown in a vehicle diagram. The IO- pole plugs on central electrical system are clipped together from 3 parts. Part 1, with the cast-on fastening pin, is the “initial element”. Part 2 is the “module element”. Both parts are identified by the digits 1 . . . 5. Part 3 is a “coding element”. The designations of the plug connections in wiring diagram for central electrical system refer e. g. from A 11 . . . 15 to the “initial element”, from A 21 . . . 26 to module element.
