Self-diagnosis:

Self-diagnosis:

When the control unit detects problems concerning the "ABS" through the self-diagnosis system, it sends a signal to the instrument cluster C10 which turns on the "ABS failure" warning light: this signal is sent from pin 20. If the problems concern the "EBD" function, the handbrake warning light is turned on, from pin 21.

The diagnostic connector T20 connected to pin 11 is used to connect to the ECU to diagnostic tools.

ECU pin 22 sends the tachometer signal to panel C10.

The ABS control unit N51 is connected - from pins 29 and 30 - via the CAN line with the engine management control unit S11, pins 12 and 29 of connector A for managing the misfire logic and providing the speedometer signal value.

FAULT-FINDING

AUTOMATIC CHECK UPON IGNITION:

when the car is started the "ABS warning light" on the instrument cluster turns on for appr. 2 secs., then it goes off meaning that the system is working properly. If the warning light stays on, carry out diagnosis using the flashing code, as mentioned follows.

N.B.:

When the control unit detects an error in the "ABS" function and turns on the warning light [symbol], it simultaneously deactivates the system, therefore, in these conditions the car brakes only with the conventional system. When the control unit also detects an error of the "EBD" function, it turns on both warning lights [symbol] e [symbol]. Under these conditions also control of the rear braking distribution is deactivated, and the car must be driven very carefully.