Audi A4 2001 Owner's Manual page 13

To complement the comprehensive body
modifications, occupant protection has been
improved through the further development of
the familiar 8.4 airbag system.
The new generation bears the designa-
tion 8.4 E, where the E stands for
"extended".
The position of the sensors is selected so that
they are installed as near as possible to the
outer structure of the vehicle.
This enables quicker deceleration detection in
the event of an impact.
Key
E224 Key switch for switching off
passenger's side airbag
G179 Side airbag crash sensor, driver's
side (B-pillar)
G180 Side airbag crash sensor, passenger's
side (B-pillar)
G256 Crash sensor for rear side airbag,
driver's side
G257 Crash sensor for rear side airbag,
passenger's side
G283 Front airbag crash sensor, driver's
side
G284 Front airbag crash sensor,
passenger's side
J162 Heater control unit
J220 Control unit for motronic
J234 Airbag control unit
J285 Control unit with display unit in
dash panel insert
J393 Central control unit for convenience
system
J526 Control unit for telephone /
telematics
J533 Diagnosis interface for data bus
(Gateway)
The system comprises driver/passenger air-
bags, front side airbags, optional rear side
airbags, SIDEGUARDS
belts with ball tensioners and belt force limit-
ers, three point rear outer seat belts, centre
lap belt (for fixed rear seat bench), Isofix pre-
paration in rear of vehicle, and a total of 6
non-central accelerometers:
– 2 front impact crash sensors
– 2 driver/passenger side airbag crash sen-
sors, (in the B-pillar for side impact)
– 2 driver/passenger rear side airbag crash
sensors, (on the C-pillar for side impact)
The external sensors deliver digitised acceler-
ation data to the airbag control unit, which is
then evaluated in the control unit and which
triggers the relevant restraint system compo-
nents.
K75 Airbag warning lamp
K145 "Airbag off" warning lamp,
passenger's side
N95 Airbag igniter, driver's side
N131 Airbag igniter 1, passenger's side
N153 Igniter for belt tensioner, driver's side
N154 Igniter for belt tensioner,
passenger's side
N199 Igniter for side airbag, driver's side
N200 Igniter for side airbag, passenger's
side
N201 Igniter for rear side airbag,
driver's side
N202 Igniter for rear side airbag,
passenger's side
N277 Igniter for airbag in B-pillar
®
(SIDEGUARD
N278 Igniter for airbag in B-pillar
®
(SIDEGUARD
T16 Connector, 16-pin, diagnosis
connection
®
, three point front seat
), driver's side
), passenger's side
13