Fault diagnosis

FAULT DIAGNOSIS

Self-test

When the system is switched on, it will conduct a self-test, recognized by the flashing of the dissuasion LED at 4 Hz. If there is a fault or breakdown in the system, the LED indicates it in accordance with the methods stated in Table 1.

Table 1. Automatic diagnosis display

If a door, the bonnet or the boot are open or if a fault in the volumetric sensors is detected, the relevant sensor is excluded from surveillance and a warning acoustic signal (beep) is emitted one second after switching on.

At the time of switching off, if an alarm has been triggered during surveillance (see Table 2), the system indicates by the flashing of the dissuasion LED which sensor has triggered the alarm.

Table 2. Alarm signalling

The flashing codes are presented in sequence.

These codes are spaced by a 1.5 s pause.

Manual diagnosis

MANUAL DIAGNOSIS can also be conducted, by opening the bonnet and setting the ignition switch from the MARCIA (ON) position to the STOP position; within 15 s the bonnet protection button must be pressed 7 times in succession in less than 10 s; 5 beeps will indicate the start of the manual diagnosis procedure. After 10 s, there will be an indication in the form of 1 flash or the direction indicators.

When this mode is entered, the self-test procedure of the volumetric sensors connected to the control unit is automatically activated. If the test is OK, the direction indicators will flash 3 times and 3 beeps of the siren will be heard at the same time.

After this first stage, any change in switch status will be accompanied by a brief flashing of the direction indicators and a beep, accompanied by flashing of the warning LED on the dashboard.

If the ignition key is set to the STOP position, the siren will sound briefly (500 ms) and the direction indicators will flash (2.5 s).

This final operation will lead to exiting from the manual diagnosis procedure. It is also possible to exit from MANUAL DIAGNOSIS by not performing any actions for 30 s; the exit will be indicated by the direction indicators coming on for about 2.5 s and a beep.