The parking sensor control unit M84 receives a supply at pin 1 of connector A from the INT line protected by fuse F40 of junction unit B2; pin 8 of connector A is earthed.The control unit is connected, via pins 7 and 4 of connector A and the CAN, to all the other nodes in the same network; in this way it receives, amongst others, the reverse gear engaged signal.It sends the commands for operating the buzzer to the instrument panel via the CAN.A system operation inhibition signal reaches pin 5 if a trailer is connected via coupling D73. E2050 PREDISPOSIZIONE RIMORCHIO .The four parking sensors K97 are connected to connector C of control unit M84 pin 1 providing the reference earth, pin 6 the power supply pins 5, 3, 2 and 4 are connected to sensors K97A, K97B, K97C and K97D, respectively.