3239520 - E7022 VDC - Functional description

Functional description

ABS electronic control unit M50 is supplied (at pins 12 and 6) directly by the battery via a line protected by the ABS maxifuse, located directly on the battery A1 - connector C. The supply controlled by the ignition (15/54) reaches pin 23 from the line protected by fuse F6 of the additional fuse box B98 A . The control unit is earthed via pins 1 and 5. The four sensors K70, K71, K75, K76 send wheel speed signals to pins 12-28, 16-15, 14-13 and 30-31 of M50 respectively. Brake pedal switch I30 sends a 'pedal depressed' enablement signal to pin 32 of control unit M50 : the ABS cannot intervene unless the brake pedal is pressed. The control unit M50 receives a 'pedal released' signal, double switch, at pin 20. The 'ASR OFF' control button on panel H35 sends a deactivation signal to pin 28 of M50 , while pin 27 relays a signal that turns on an LED on panel H35 when the system is off. Steering sensor K58 is supplied by ABS control unit M50 at pin 39 and receives a reference earth from pin 21: the signal that detects sudden changes in steering direction is sent via the CAN line to engine control unit M10 and ABS control unit M50 (pins 24 and 40). The CAN line that connects M50 (from pins 24 and 40) to M10 allows the ASR function to notify the engine management control unit of excessive engine power. this line is not direct, but passes through the steering sensor K58 See E5030  PETROL ENGINE ELECTRONIC MANAGEMENT ,  See E5050  DIESEL ENGINES ELECTRONIC MANAGEMENT . Yaw sensor K74 is supplied from ABS control unit M50 at pin 39, while it receives a reference earth from pin 21: control and command signals are exchanged with ABS control unit M50 , at pins 8, 9, 10 and 41. Pressure sensor K72 is supplied from ABS control unit M50 at pin 42, while it receives a reference earth from pin 25: the pressure detection signal is sent to pin 26 of ABS control unit M50 . If the control unit

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