223002389 - E3510 RADIO - FUNCTIONAL DESCRIPTION (Cargo trim level, MY 2005)

The operation of ratio 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 of connector A of radio P20.The radio is supplied directly (pin 7 connector A) by the battery via a line from fuse F1 contained in engine compartment junction unit B01 and protected by fuse 39 in under-dashboard junction unit B02.Radio P20 receives ignition-controlled power (INT) (pin 4 of connector A) via the line of fuse F49 from under-dashboard junction unit B1 .Radio P20 receives a power supply at pin 6 of connector A with side lights on for interior lighting via a line controlled by body computer M01 and protected by fuse F51 of junction unit B02.The following cables with signals for the speakers leave radio connector B:- right front side on dashboard P38 from pins 3 and 4 via short-circuiting junction D97 D;- left front side on dashboard P37 from pins 5 and 6 via short-circuiting junction D97 B;Pin 5 connector A is connected to the amplifier of aerial P25 while pin 8 connector A is earthed.Speaker P38 assumes a dual coil configuration when mobile phone wiring is installed.