Fault Memory; Crash Memory - Fiat Brava Service Manual

Bravo-Brava
Electrical equipment
Air bag
55.
Fault memory
Throughout the period the vehicle is in motion, the electron control unit continually monitors the sys­
tem 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.
Copyright Fiat Auto II 98 - Supersedes pievious version 95