Audi A8 2019 Service Training page 65

Interaction airbag
Introduction
The 2019 A8 is available with interaction airbags. They are
standard on the front seats and optional for the rear seat.
Front and rear interaction airbags
Design
The interaction airbags are pyrotechnic hybrid gas genera-
tors. The "standard" side airbags are generally solid propel-
lant generators. Each interaction airbag is housed in a "hard
cover".
The internal pressure of the inflated interaction airbags is
much higher than that of side airbags. Unlike "standard"
side or front airbags, interaction airbags do not have an
outlet orifice. Therefore, the excess pressure in the airbag
escapes only through the fabric and through the seams of
the airbag. This means that the interaction airbag has a
much longer useful life than a side airbag. This is necessary
because it has to protect the occupants over a longer period
of time. The interaction airbags are activated in all severe
side-on impacts in which the side airbags also deploy.
Reference
For information on installation and removal of the interaction airbags, please refer to the electronic service information
and Guided Fault Finding.
The interaction airbags deploy in the event of a side-on
collision and can prevent vehicle occupants sitting side by
side from colliding with one another.
Diagnostics
The interaction airbags are pyrotechnic components. The
safety instructions are the same as for other pyrotechnic
components. After igniting, the interaction airbags are
unusable and have to be replaced. The Airbag Control
Module J234 continuously monitors the interaction airbags
for proper functioning. Faults in the system are registered
as DTCs by J234. These faults can be cleared using the
"Guided Fault Finding".
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