Audi A4: Advanced airbag system
Fig. 70 Headliner: indicator light to display the status of
the front passenger's airbag
The Advanced Airbag System in your vehicle has
been certified to comply with the requirements
of the United States Federal Motor Vehicle Safety
Standard (FMVSS) 208, as well as Canada Motor
Vehicle Safety Standard (CMVSS) 208 as applicable
at the time your vehicle was manufactured.
According to these requirements, the front Advanced
Airbag System on the passenger's side
has been certified for "suppression" for infants
approximately 12 months old and younger, and for "low risk deployment" for
children aged 3 to
6 years old (as defined in the standard).
The advanced airbag system will activate or deactivate
the front passenger's airbag based on the
occupancy of the seat. If a front airbag deploys
during an accident, the deployment force will
adapt to the passenger.
Components
The advanced airbag system consists of the following
components:
- Front airbags in the steering wheel and in the
instrument panel on the front passenger's side:
these can protect the front passengers during
an accident
- Passenger occupant detection sensor in the
front passenger's seat: this detects if the front
passenger's seat is occupied (for example, by a
person or a small child in a child safety seat)
- Seat position sensors on the front seats: these
determine the distance between the seat and
the steering wheel or instrument panel
- Sensors in the front safety belt latch: these detect
if the safety belts are fastened
- PASSENGER AIR BAG OFF ON
indicator
light in the headliner:this indicates if the
front passenger's airbag is activated or deactivated
- Indicator light in the
instrument cluster:
this monitors the function of the Advanced Airbag
System components to ensure they are
functioning correctly
How the components function together
The passenger occupant detection sensor in the
front passenger's seat detects if the front passenger's
seat is occupied. The passenger occupant
detection sensor measures the electrical capacity
on the front passenger's seat. The passenger's
airbag is activated or deactivated depending
on the electrical capacity that is measured.
The passenger's airbag is activated if:
- The electrical capacity is higher than the
threshold stored in the control module
- The electrical capacity is the same as or greater
than the electrical capacity of a typical adult
The passenger's airbag is deactivated if:
- The electrical capacity is lower than the threshold
stored in the control module
- The electrical capacity is the same as or less
than the electrical capacity of a typical one-year-
old child in a child safety seat that has
been used for certification in accordance with
FMVSS 208
If the front passenger's airbag is activated, the
PASSENGER AIR BAG ON indicator
light
will turn on. If the front passenger's airbag is deactivated,
the PASSENGER AIR BAG OFF
indicator light will turn on.
The deployment force of the front airbags adapts
based on whether or not the safety belt is used
and the distance between the seat and the steering
wheel/instrument panel. For example, if a
person is too close to the front airbag, the front
airbag will deploy with less force to help reduce
the risk of injury.
Meaning of PASSENGER AIR BAG OFF
ON
indicator light
When the ignition is switched on, the system detects
whether the front passenger's seat is occupied.
PASSENGER AIR BAG OFF ON
will turn on for several seconds during this process.
Then it will indicate whether the front passenger's
airbag is activated or deactivated.
- PASSENGER AIR BAG OFF :
the front
passenger's airbag is deactivated and will not
deploy in the event of an accident.
- PASSENGER AIR BAG ON : the
front passenger's
airbag is activated and could deploy in
the event of an accident.
If a change to the occupancy status of the front
passenger's seat is detected
PASSENGER AIR BAG OFF , ON
will
flash for several seconds and will then display the
status of the front passenger's airbag.
Always make sure the indicator light corresponds
to the occupancy of the front passenger's seat.
- An adult or individual of similar size in the
front passenger's seat: the front passenger's
airbag must be activated, therefore
PASSENGER AIR BAG ON must
remain
turned on.
- An individual of smaller size (for example, an
adolescent or small adult) in the front passenger's
seat: the front passenger's airbag
must be activated, so
PASSENGER AIR BAG ON must stay
on.
- Child in a child safety seat on the front passenger's
seat: the front passenger's airbag
must be deactivated, so
PASSENGER AIR BAG OFF
must stay on.
- Front passenger's seat not occupied: the front
passenger's airbag must be deactivated, so
PASSENGER AIR BAG OFF
must stay on.
WARNING
READ NEXT:
General information
When installing and using child safety seats, follow
the information in this Owner's Manual, the
applicable state and federal regulations, and the
manufacturer instructions for the
Fig. 71 Rear bench seat: lower LATCH anchors
Observe the safety precautions.
In the United States and Canada, child safety
seats can be secured without safety belts using
the LATCH system. LATCH sta
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1 -
Mirror Trim
2 -
Bolt
1.5 Nm
3 -
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