The body computer M01 receives a supply controlled by the ignition and a direct supply at pins 11 of connector E (INT) and pin A of connector C of under-dashboard junction unit B02 .The direct power supply is protected by fuse F1 in engine compartment junction unit B01.These lines also supply the control panel by splitting inside under-dashboard junction unit B02 (MAXIFUSE). These lines are protected by fuses F37 and F53.Pins 8 and 9 of connector E of the body computer M01 are earthed. This reference signal is also supplied to the panel via pin 36 connector F of the body computer.Pins 4 and 5 of connector C of body computer M01 are connected by means of two cables to aerial P91 located coaxially on the ignition switch in order to receive an insertion signal from the key fitted with a trasponder.Body computer M01 communicates with engine management unit M10 via pins 36 and 37 connector C (B-CAN line) and pins 36 and 52 of connector A of engine management unit M10.The key is recognised and the codes are exchanged via this line.Engine control unit M10 sends a diagnostic signal (K line) from pin 10 of connector A to pin 20 connector C of the body computer.The diagnostic line is connected to pin 7 connector B of body computer M01. See E8010 DIAGNOSTIC MULTIPLE CONNECTORThe self-diagnostic system also generates a signal that can be used to display the vehicle protection system fault warning light located in instrument panel E50 and sent via the B-CAN line to pins 8 and 9 connector A.