Fault memory

Fault memory

Throughout the period the vehicle is in motion, the electron control unit continually monitors the system to check the continuity of circuits and components.

Detected faults are stored and an "air bag failure" warning light comes on on the instrument panel. The FAULT MEMORY may be consulted during Service by connecting a FIAT/LANCIA-TESTER to the tester point (see details below)

Crash memory

As mentioned previously, the complex microprocessor and control unit software monitors the signal from the accelerometric sensor and identifies impact severity level.

If the impact is sufficiently severe, and the safety sensor sends an enablement signal, an activation signal is sent to the pretensioners or air bags.

This activation order is stored in a special crash memory that contains records of intervention threshold violations and safety sensor enablement signals.