The function is managed by the instrument panel E050 which receives a power supply from the battery at pin 2 via the line protected by fuse F53 of the junction unit under the dashboard via the Body Computer M001 (pin 31 of connector A). In the same way E050 receives an ignition-controlled power supply (INT) at pin 3 via the line protected by fuse F37 of B002 via M001 (pin 31 of connector A).Pin 1 of E050 is earthed.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 TRIP button for scrolling the parameters (brief press) or zeroing the Trip computer (long press) is located on the end of the right-hand lever of steering wheel interface H005. It receives a reference earth at pin 10 via the line from the Body Computer and sends a signal from pin 9 to pin of the instrument panel E050.On versions with Cruise Control, the steering column switch unit H005 receives a reference earth at pin 16 and provides the instrument panel E050 with the TRIP button signal from pin 15.The TRIP B function can be deactivated by operating the buttons in the left control panel using the special Set-up menu in the instrument panel display. The left-hand control unit H091 sends the control signals from pins 4 ("Mode" and "Mode+") and 12 ("Mode-") to pins 13 and 16 of the instrument panel E050. Pin 1 of H091 is earthed.The signal relating to the fuel level is managed according to the data provided by the level detector located in electric fuel pump unit N040. The Body Computer provides the sensor with a reference earth (pin 21 of connector B) and receives a proportional signal at pin 7 of the same connector, and forwards it to instrument panel E050 via the CAN.Dpending on the signals received from the sensors at the wheels, the ABS control unit M050 provides a signal from pin 16 at the vehicle speed frequency (VSO) for the Body Computer M001 (pin 10 of connector D). The Body Computer, in turn, forwards this signal, via the CAN, to the instrument panel E050.On versions with ABS/ESP (LOW trim level) the speedometer signal is supplied by the dedicated sensor K084 (pin 2) to the Body Computer M001 (pin 10 of connector D).Engine management control unit M010 sends the signal coming from engine rpm sensor K046 to the instrument panel via the CAN. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The TRIP electronic module uses these signals to process information on instantaneous and average fuel consumption, range, average speed, Km travelled, duration etc.