VDC - FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

The ABS-VDC electronic control unit M50 receives a power supply (at pins 12 and 25) directly from the battery from the line protected by fuses F5 and 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 11 and 24.

The four sensors K70, K71, K75, K76 send wheel speed signals respectively to pins 19-20, 7-8, 21-22, 9-10 of control unit M50.

The steering sensor K58 also receives an ignition-controlled power supply from the line protected by fuseF42 of the junction unit under the dashboard B2 and is connected via the CAN to control unit M50 and the other nodes.

The yaw (and lateral and longitudinal acceleration) sensor K74 also receives an ignition-controlled power supply from the line protected by fuseF42 of the junction unit under the dashboard B2 and is connected via the CAN to control unit M50 and the other nodes.

The "ASR VDC" control button in the controls H35 sends a deactivation signal to pin 3 of M50, whilst the signal that switches on the LED with the system turned off is sent from pin 4; switch H35 receives an ignition-controlled power supply from the line protected by fuse F35 of the junction unit under the dashboard B2.

The brake pedal switch I30 sends an enablement signal to pin 17 of the control unit M50: all intervention of the ABS is excluded unless the brake pedal is pressed (signal from N.A. contact); switch I30 receives an ignition-controlled power supply (INT) from fuse F37 of junction unit B2.

The "discreet" speedometer signal sent by the Body Computer M1 leaves from pin 16 of M50; the same signal is replicated via the CAN.

The ABS control unit M50 is connected, via the CAN - from pins 1 and 2 - to the engine management control unit M10, to the Body Computer M1 and to the instrument panel E50 to manage the various warning lights for the ABS.

The autodiagnostic data can be read by connecting to connector C of the Body Computer M1 - pin 1: it receives signals from pin 6 of control unit M50 via the special diagnostic line.

See E8010 DIAGNOSTIC MULTIPLE CONNECTOR