The ABS electronic control unit M50 receives a power supply (at pins 2 and 3) directly from the battery from the line protected by maxifuse F5 of the engine compartment junction unit B1.The ignition-controlled power supply (INT) arrives at pin 18 from the line protected by fuse F42 of the junction unit under the dashboard B2The control unit is earthed at pins 1 and 4.The four sensors K70, K71, K75, K76 send wheel speed signals respectively to pins 5-26, 10-9, 17-6, 19-8 of control unit M50.The switch for the brake pedal I30 sends a positive enablement signal to pin 20 of control unit M50 and any interevention of the ABS is excluded unless the brake pedal is pressed; the switch I30 receives an ignition-operated power supply (INT) from fuse F37 of junction unit B2.The pedal released signal (signal from N.C. contact) is sent by switch I30 to pin 13 of control unit M50; the N.C. contact for switch I30 receives an ignition-operated supply (INT) from fuse F35 of junction unit B2.The lateral acceleration and slewing sensor K74 receives an ignition-operated power supply (INT) from the line protected by fuse F42 of the junction unit under the dashboard B2 and is connected to control unit M50 via the CANVia the CAN line, ABS control unit M50 is also connected - from pins 15 and 326 - to the engine management control unit M10, the Body Computer M1 and the instrument panel E50, to manage the ABS warning light and, if the problems concern the EBD function, the low brake fluid level/handbrake applied warning light.The ESP and ASR function manage the ESP warning light as described previously. The same is true for the HH warning light.The ASR OFF control button, in the control panel H35, sends the off signal to pin 21 of M50, whilst the signal that lights up the LED - also in panel H35 with the system off - is sent from pin 22; switch H35 receives an ignition-operated power supply (INT) from fuse F49 of junction unit B2.The "discreet" speedometer signal sent by the Body Computer M1 leaves from pin 23 of M50; the same signal is replicated via the CAN.The autodiagnostic data can be read by connecting to connector C of the Body Computer M1- pin 1: it receives signals from pin 11 of control unit M50 via the special diagnostic line. See E8010 DIAGNOSTIC MULTIPLE CONNECTOR.