2401154 - E3510 RADIO - Functional description (HI-FI)
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. Pin 6 of connector A of P20 receives the supply for the dimmed lighting, coming from pin 12 of connector B of E50 See E2530 INSTRUMENT LIGHTING . The radio P20 is connected to the radio controls on the steering wheel in the steering wheel control unit M93 which is a node of the CAN See E1050 CAN CONNECTION LINES .; the connection takes place via the clock spring D47 . The steering wheel control unit M93 receives an ignition-operated supply (INT) - pin 57 - via the line for the fuse F49 of the junction unit under the dashboard B2 . The aerial P25 is connected to the radio also via the specific coaxial cable. Connector E of P20 has the cable connected to the CD player P75 coming out of it. The amplifier P70 is supplied directly from the battery to pin 3 - through the line of fuse F54 of the additional fuse box B98 . pin 7 of amplifier P70 is earthed. Pin 8 of P70 is then connected via a specific line to the radio P20 pin 6 of connector C which provides a positive enablement signal for switching the amplifier on.The other signals coming out of the BOSE amplifier P70 control the speakers:
- 1 and 4 left audio channels
- 2 and 5 right audio channels
Connector B of P20 sends out cables carrying signals to the speakers:
- pins 5 and 6 to the left front speakers
- pins 3 and 4 to the right front loudspeakers P36 and P46 ;
- pins 7 and 8 to the left rear loudspeaker P30 and P47;
- pins 1 and 2 to the right rear loudspeaker P31 and P48.