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152
Airb a g sys t e m
- Always move the passenger seat into its
rearmost position in the seat's fore and
aft adjustment range, as far away from
the a irbag as poss ible, before insta lling
the forward-facing child restraint. The
backrest must be adjusted to an upr ight
posit ion.
- Make sure that the
PASSENGER AIR BAG
OFF
light comes on and stays on all the
t ime whenever the ignition is switched
on.
Advanced Airbag System components
The fron t passenger sea t in your vehicle has a
lot of very important par t s of the Advanced
Airbag System in it. These parts include t he
weight -sensing mat, sensors, wiring, brack-
ets, and more. The function of the system in
the front passenger seat is checked by the
e lectronic control un it when the ignit ion is on.
The control unit mon itors the Advanced Air-
bag System and turns the airbag indicator
light on when a ma lfunction in t he system
components is det ected. The func t ion of t he
a irbag ind icator light is described in greater
detai l be low. Because the front passenger
seat contains important parts of the Ad-
vanced Airbag System, you must take care to
prevent it from be ing damaged. Damage to
the seat may prevent the Advanced Airbag for
the front passenger seat from doing its job in
a crash .
The front Advanced Airbag System
consists of the following:
- Crash sensors in the front of the veh icle that
measure veh icle acceleration/deceleration
to provide information to the Advanced Air-
bag System abou t the seve rity of the crash.
- An electron ic control unit, with integ rated
crash sensors for front and side impacts .
The cont rol unit "dec ides " whet her to fire
the front airbags based on t he information
received from the crash senso rs. The contro l
unit a lso "decides" whethe r the safety be lt
pretensioners should be activated .
- An Advanced Airbag with gas generator and
cont rol valve for the d river inside the steer-
ing wheel hub.
- An Advanced Airbag with gas ge nerator and
contro l valve inside the instrument pane l for
the front passenger.
- A weight-sensing mat under the up ho lstery
pad d ing of the front passenger seat cushion
that measures the total weight on the seat.
The informat ion registered is sent continu-
ously to the electronic contro l unit to regu-
late deployment of the front Advanced Air-
bag on the passenger side .
- An airbag monitor ing system and indicator
light in the instr ument cluster ~
page 156 .
- A sensor in each front seat registers the dis-
tance between the respective seat a nd the
steer ing whee l or instr ument panel. The in-
formation registered is sent cont inuously to
t he ele ctr o nic cont ro l uni t to regula t e de-
ployment of the front Advance d Airbags .
- The
PASSENGER AIR BAG OFF
ligh t comes
on and st ays on in the cen t er of the instr u-
ment panel
~ page 156, fig. 156
and t ells
you whe n the front Advanced Airbag on the
passenger side has been tu rned off.
- A sensor below the safety be lt latch for the
front seat passenger to measure the tension
on the safety be lt . The tension on the safety
be lt and the weight registered by the
weight-sensing mat he lp the control unit
"decide" whether the front airbag for the
front passenger seat should be turned off or
not ~
pag e 146, Child restraints on the
front seat - some important things to
know.
- A senso r in the safety belt latch fo r t he d riv-
er and fo r the front sea t passenger t ha t
senses whet he r t hat safety bel t is latched or
not and transmi t s this information to the
electronic control unit.
A
WARNING
Damage to the front passenger seat can
prevent the front airbag from work ing
properly.
-
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