125002313 - E3510 RADIO - FUNCTIONAL DESCRIPTION

Operational description

The radio P20receives a direct power supply (7 of connector A) from the battery via the line for fuse F39 of the junction unit under the dashboard B2and maxifuse CPL of B99.The power supply reaches pin 4 of connector A with the side lights on    See E2530 INSTRUMENT LIGHTING.The CAN line arrives at pins 1 and 3 of connector A with which the radio P20is connected to the Body Computer M1and to the other system nodes.Pin 8 of connector A is earthed.The aerial P25 receives a power supply from pin 5 of connector A . The aerial is connected to the radio by means of the special coaxial cable.

The following cables with signals for the speakers leave connector B:

  • pins 5 and 6 to the left front speakers P35 and P45,
  • pins 3 and 4 to the right front speakers P36 and P46,
  • pins 7 and 8 to the left rear speakers P30 and P47,
  • pins 1 and 2 to the right rear speakers P31 and P48,
Pins 10 and 11 of connector C are connected to the radio controls on the steering wheel: the connection takes place via the clock spring D47; the device which controls the control buttons receives an ignition-operated supply (INT) from the line protected by fuse F51 of the junction unit under the dashboard B2, whilst the reference earth arrives from pin 12 of connector C of P20.The connecting cable leaves connector C of P20 (pins 13-20) for the CD player P75 in accordance with the following connections: - Pin 13 asci bus from CDC to the radio - Pin 14 asci bus from the radio to the CDC - Pin 15 +12 permanent - Pin 16 +12V switched - Pin 17 digital earth - Pin 18 audio earth - Pin 19 left audio CDC - Pin 20 right audio CDC.