Fault memory

Fault memory

Whilst the vehicle is driving, the electronic control unit carries out a constant fault diagnosis of the system, thereby checking the continuity of the circuits and components.

If a fault is detected, it is memorized and, at the same time, the “Air Bag failure” warning light in the instrument panel comes on.

The fault memory can be consulted in a service situation by connecting the FIAT/LANCIA TESTER or other diagnostic equipment to the diagnostic socket (see details below).

Crash memory

As stated previously, the control unit microprocessor carries out complex algorhythm calculations and checks on the signal coming from the accelerometric sensor and recognizes the degree of severity of an impact. Depending on this degree of severity and, with the go ahead of the safety sensor, it sends an activation signal to the Air Bags.

This activation order is stored in a special crash memory which contains information relating to the exceeding of the intervention thresholds and the go ahead of the safety sensor.