198000505 - E3510 RADIO - FUNCTIONAL DESCRIPTION (Hi-Fi system)

FUNCTIONAL DESCRIPTION

Radio P20 is supplied directly (7 of connector A) from the battery via the line of fuse F39 of the junction unit under the dashboard B2 .Pin 8 of connector A is earthed.Pins 1 and 3 of connector A receive the CAN line by which radio P20 is connected to Body Computer M1 and the other system nodes.The Body Computer M1 is connected to the radio controls on the steering wheel via clock spring D47: pin 27 of connector H of M1 receives the signals for the buttons on the right of the steering wheel, whilst pin 15 of connector H of M1 receives the signals from the buttons on the left of the steering wheel.The Body Computer M1 receives a direct supply from the battery via the line protected by maxifuse B99 at pin 18 of connector F of the interface with the junction unit under the dashboard B2; the ignition-controlled supply (INT) reaches pin 9 of connector F of the interface with the junction unit B2.The amplifier P70 receives a direct supply from the battery - at pin C8 - via the line for fuse F32 of the junction unit under the dashboard B2; pin C1 of amplifier P70 is earthed.Pin C2 of P70 is connected via a line to radio P20 - pin 5 of connector A - which supplies a positive signal to enable the amplifier to be switched on.Pin C3 of P70 is connected via a line to radio P20 - pin 2 of connector A - which supplies a positive signal to recognize the status of the subwoofer to set the acoustics.The cables with signals leave connector B of P20 for the amplifier P70 (pins B7-C7, C4-B4, B5-C5 and B6-C6)The following cables with signals for the speakers leave connector A of P70;- pins A6 and A7 to the left front speakers P35 and P45;- pins A4 and A5 to the right front speakers P36 and P46;- pins A3 and A2 to the left rear speakers P30 and P47;- pins B2 and B3 to the right rear speakers P31 and P48.