2429902 - E3510 RADIO - Functional description (BOSE System)

Functional description

The radio P20 is supplied directly (4 of connector A) from the battery via the line of fuse F39 of the unit under the dashboard B2. Pins 1 and 3 of connector A receive the CAN line with which the radio P20 is connected to the Body Computer M1 and the other nodes of the system. Pin 8 of connector A is earthed. The aerial P25 is connected to the radio also via the specific coaxial cable and is supplied by pin 5 of connector A of P20. Pin 6 of connector A of P20 receives the supply for the lighting (with the side lights on) of the actual radio display, pin 40 of connector E of M1. Radio P20 is not connected to the radio controls on the steering wheel: the connection is via the clock spring D47, which is a node of the CAN See E1050 CAN CONNECTION LINES . Connector E of P20 has the cable connected to the CD player P75. Connector B of P20 sends out cables carrying signals to the speakers:The cables with the signals to the loudspeakers com out of connector B; these signals are sent to the amplifier BOSE P70, which controls the loudspeakers. pins 5 and 6 to the left front loudspeaker P35 , pins 3 and 4 to the right front loudspeaker P36, pins 7 and 8 to the left rear loudspeaker P30 , pins 1 and 2 to the right rear loudspeaker P31. The amplifier P70 is supplied directly from the battery to pin 1 - through the line of fuse F54 of the additional fuse box B98. It is then connected - pin 6 - via a specific line to the radio P20 - pin 6 of connector C - which sends the signal to switch on the amplifier. Pin 2 of the amplifier P70 is earthed. The other signals coming from the BOSE amplifier P70 control, as described above, the loudspeakers. The rear subwoofer P49 is located next to the unit containing the amplifier P70 and is directly connected to it. pins 3, 11, 12 e 15 of P70.