The navigation system electronic circuit built into radio P20 is supplied directly at pin 7 of connector A by a line protected by fuse F39 in under-dashboard junction unit B02 and from fuse F1 of engine compartment junction unit B01.The supply controlled by the ignition (INT) reaches pin 4 via the line protected by fuse F49 of the junction unit under the dashboard B002.Navigation system P20 communicates with the body computer via pins 1 and 3 of connector A. It also receives a power supply from the body computer for the interior lighting via a line protected by fuse F51 within pin 15 of connector D.Pin 12 of connector D of the navigation system is earthed.The speedometer signal generated by sensor K84 is sent to body computer M01 at pin 17 of connector C and then sent to the radio (pin 11 connector d) from pin 23 of connector E.The reversing signal reaches pin 3 of connector D See E2022 REVERSING LIGHTSAerial signal P25 enters the navigation system at pin 5 of connector A.Pins 9 and 18 of connector D are connected to the handsfree microphone built into courtesy light G10 for the mobile phone function.The body computer may be suppied via pin 11 connector E (ignition-operated supply) and pin A connector C (direct supply) of junction unit B02. Fuse F1 in engine compartment junction unit B01 protects the direct power supply.Pins 8 and 9 of connector D of the body computer are earthed.