The ABS electronic control unit M50receives a power supply (at pins 2 and 6) directly from the battery through the line protected by maxifuse F4 of the engine compartment junction unit B1.The ignition-controlled power supply (INT) arrives at pin 23 from the line protected by fuse F42 of the junction unit under the dashboard B2.The control unit is earthed at pins 1 and 5.The four sensors K70send wheel speed signals to pins 28-12, 15-16, 13-14 and 30-31 ofM50, K75, K76send speed signals for the wheels to pins 28-12, 15-16, 13-14, 30-31 of M50respectively.The brake pedal switch I30sends an enablement signal to pin 32 of junction unit M50: any intervention of the ABS is excluded unless the brake pedal is pressed; switch I30receives an ignition-operated supply (INT) from fuse F37 of junction unit B2.From pin 37 of M50a discrete speedometer signal sent to the Body Computer M1leaves; the same signal is replicated via the CAN.Via the CAN, the ABS control unit M50is connected - from pins 24 and 40 - to the Body Computer M1and to the instrument panel E50, to manage the "ABS failure" warning light and, if the problems involve the EBD function, the "low brake fluid level" and "handbrake" warning lightThe autodiagnostic data can be read by connecting to connector G of the Body Computer M1- pin 1: it receives the signals from pin 11 of control unit M50via the special diagnostic line.