223002415 - E3510 RADIO - FUNCTIONAL DESCRIPTION (Doblò trim level, MY 2005)

Operation of the radio system P20 is controlled by the body computer by lines leaving pins 5 and 17 connector E of junction unit B02 and entering pins 1 and 3 connector A of radio P20.The radio is supplied directly (pin 7 connector A) from the battery via the line of fuse F1 contained in engine compartment junction unit B01 and protected by fuse F39 of under-dashboard junction unit B02.Radio P20 receives an ignition-operated power supply (INT) (pin 4 connector a ) via the line of fuse F49 of under-dashboard junction unit B02.Radio P20 receives at pin 6 of connector A a power supply with side lights on for interior lighting via a line controlled by body computer M01 and protected by fuse F51 of junction unit B02.Cables carrying signals for the speakers leave connector B:- right front side on dashboard P38 and door P36 from pins 3 and 4 via short-circuiting junction D97 D;- left front side on dashboard P37 and door P35 from pins 5 and 6 via short-circuiting junction D97 B;- right rear P31 from pins 1 and 2;- left rear P30 from pins 7 and 8;Pin 5 connector A is connected to aerial amplifier P25 while pin 8 connector A is connected to earth.Speaker P38 assumes a dual coil configuration when mobile phone wiring is installed.    See E3580 PREPARATION FOR CELLULAR TELEPHONEThe body computer is supplied via pin 11 connector E (ignition-operated power supply) and pin A connector C (direct power supply) of junction unit B02. Fuse F1 in junction unit B01 protects the direct power supply.Pins 8 and 9 of connector D of the body computer are earthed.