The activation of the compressor L021 takes place via relay T05 located in the engine compartment junction unit B001. The relay coil receives a power supply from relay T09 also located in the engine compartment junction unit. Both relays are controlled by the engine management control unit M010, from pin 79 and pin 80 respectively of connector B of M010.Following the activation control from T05, the compressor L021 receives a power supply from the battery via the line protected by fuse F19.The compressor activation request comes from the climate control system control unit M070 (pin 37) and reaches pin 28 of connector B of M010.The climate control system control unit receives a power supply from the battery from the line protected by fuse F39 located in the junction unit under the dashboard B002 which reaches pin 30 of M070.It also receives an ignition-controlled power supply (INT) from the line protected by fuse F51 in the junction unit under the dashboard which reaches pin 39 of M070. See E6020 AIR CONDITIONING The Body Computer receives a power supply from the battery, via the line protected by fuse F1 located in the engine compartment junction unit B001. It also receives an ignition-controlled power supply (INT) from the ignition switch H001. The reference earth reaches pins 10 and 19 of connector A of M001.The climate control system control unit M070 (pins 1 and 2) is connected, via the CAN, to the Body Computer M001 (pins 35 and 36 of connector D) and to the other network nodes. See E1050 CAN CONNECTION LINES When managing the function the engine management control unit acquires information relating to the pressure of the refrigerant fluid from the linear sensor K120.Linear sensor K120 receives a power supply from pin 37 of connector B of M010 and the control unit provides a reference earth for K120 via the line leaving pin 10 of connector B of M010 that reaches pin 1 of K120.The sensor K120 and the control unit exchange information via the signal that leaves pin 3 of K120 and reaches pin 87 of connector B of M010.