2009 AUDI Q7 sensor

_______________________________________________ S_a _f _e _t -=-y _ b_ e_lt _s __ lJftlll
[ i] Tips
• The shoulder belt part should route approximately over the
middle of your shoulder -under no circumstances should it route
over your neck and throat area~
& in "Safety belt position" on
page 236.
• With the front seats, the height adjustment of the seat can also
be used to adjust the position of the safety belts. •
Improperly worn safety belts
Incorrectly positioned safety belts can cause severe inju­
ries.
Wearing safety belts improperly can cause serious injury or
death. Safety belts can only work when they are correctly
positioned on the body . Improper seating positions reduce
the effectiveness of safety belts and will even increase the
risk of injury and death by moving the safety belt to critical
areas of the body. Improper seating positions also increase
the risk of serious injury and death when an airbag deploys
and strikes an occupant who is not in the correct seating
position. A driver is responsible for the safety of all vehicle
occupants and especially for children. Therefore:
- Never permit anyone to assume an incorrect sitting posi­
tion in the vehicle while traveling~&.
& WARNING
Improperly worn safety belts increase the risk of serious personal
injury and death whenever a vehicle is being used.
• Always make sure that all vehicle occupants are correctly
restrained and stay in a correct seating position whenever the
vehicle is being used.
Controls and equip­ ment Safety first Vehicle operation
& WARNING
(continued)
• Always read and heed all WARNINGS and other important infor­
mation
~ page 234. •
Safety be lt pretensioners
How safety belt pretensioners work
In front, side and rear-end collisions above a particular
severity and in a rollover, safety belts are tensioned auto ­
matically.
The safety belts are equipped with safety belt pretensioners . The
system is activated by sensors in front, side and rear -end collisions
of great severity and in a rollover. This tightens the belt and takes up
belt slack ~
& in "Service and disposal of safety belt pretensioner"
on
page 240. Taking up the slack helps to reduce forward occupant
movement during a collision.
0 Note
Never let the belt remain over a rear seat back that has been folded
forward.
[ i] Tips
The safety belt pretensioner can only be activated once.
• In minor frontal and side collisions, in rear -end collisions and in
accidents involving very little impact force, the safety belt preten ­
sioner are not activated .
• When the safety belt pretensioners are activated, a fine dust is
released . This is normal and is not caused by a fire in the vehicle .
• The relevant safety requirements must be observed when the
vehicle or components of the system are scrapped. An authorized ._
Vehicle care Do-it-yourself service Technical data

___ A_ ir_ b_ a-g _ s_y _s_ t_ e_ m _________________________________________________ _
& WARNING (continued)
• If you must install a rearward facing child safety seat on the
front passenger seat because of exceptional circumstances and
the PASSENGER AIR BAG OFF light does not come on and stay on,
immediately install the rear-facing child safety seat in a rear
seating position and have the airbag system inspected by your
authorized Audi dealer.
& WARNING
If, in exceptional circumstances, you must install a forward-facing
child restraint on the front passenger's seat:
• Always make sure the forward -facing seat has been designed
and certified by its manufacturer for use on a front seat with a
passenger front and side airbag.
• Never put the forward-facing child restraint up against or very
near the instrument panel.
• Always move the passenger seat into its rearmost position in
the seat's fore and aft adjustment range, as far away from the
airbag as possible, before installing the forward-facing child
restraint . The backrest must be adjusted to an upright position.
• Make sure that the PASSENGER AIR BAG OFF light comes on
and stays on all the time whenever the ignition is switched on. •
Advanced Airbag System components
The front passenger seat in your vehicle has a lot of very important
parts of the Advanced Airbag System in it. These parts include the
weight-sensing mat, sensors, wiring, brackets, and more. The func­
tion of the system in the front passenger seat is checked by the elec ­
tronic control unit when the ignition is on. The control unit monitors
the Advanced Airbag System and turns the airbag indicator light on
when a malfunction in the system components is detected. The
function of the airbag indicator light is described in greater detail below
. Because the front passenger seat contains important parts
of the Advanced Airbag System, you must take care to prevent it
from being 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 vehicle that measure vehicle
acceleration/deceleration to provide information to the Advanced
Airbag System about the severity of the crash.
• An electronic control unit, with integrated crash sensors for front
and side impacts. The control unit "decides" whether to fire the
front airbags based on the information received from the crash
sensors. The control unit also "decides" whether the safety belt
pretensioners should be activated.
• An Advanced Airbag with gas generator for the driver inside the
steering wheel hub .
• An Advanced Airbag with gas generator inside the instrument
panel for the front passenger.
• A weight-sensing mat under the upholstery padding of the front
passenger seat cushion that measures the total weight on the seat.
The information registered is sent continuously to the electronic
control unit to regulate deployment of the front Advanced Airbag on
the passenger side.
• An airbag monitoring system and indicator light in the instru ­
ment cluster ~
page 252.
• The PASSENGER AIR BAG OFF light comes on and stays on in the
center of the instrument panel~
page 253, fig. 253 and tells you
when the front Advanced Airbag on the passenger side has been
turned off.
• A sensor below the safety belt latch for the front seat passenger
to measure the tension on the safety belt. The tension on the safety
belt and the weight registered by the weight -sensing mat help the
control unit "decide" whether the front airbag for the front ..

__________________________________________________ A_ i _r_b _a...; g::-- s_ y =--- s_t _e _m __ ffllll
passeng er seat shou ld be turn ed off or not~ page 243 , "Ch ild
restr aint s o n the fro nt seat - some impor tant thin gs to know".
• A sensor in the safety belt latch fo r the d rive r and for the front
s e at pass enger th at s enses wh ether th at safe ty belt i s la tch ed o r not
and transmits this information to the e lectronic contro l unit.
& WARNING
Damage to the front passenger seat can prevent the front airbag
from working properly .
• Improper repair or disassembly of the front passenger and
driver seat will prevent the Advanced Airbag System from func ­
tioning properly .
• Repairs to the front passenger seat must be performed by qual ­
ified and properly trained workshop personnel .
• Never remove the front passenger or driver seat from the
vehicle.
• Never remove the upholstery from the front passenger seat .
• Never disassemble or remove parts from the seat or disconnect
wires from it.
• Never carry sharp objects in your pockets or place them on the
seat . If the weight-sensing mat in the passenger seat is punctured
it cannot work properly.
• Never carry things on your lap or carry objects on the
passenger seat . Such items can increase the weight registered by
the weight-sensing mat and send the wrong information to the
airbag control unit .
• Never store items under the front passenger seat . Parts of the
Advanced Airbag System under the passenger seat could be damaged , preventing them and the airbag system from working
properly.
• Never place seat covers or replacement upholstery that have
not been specifically approved by Audi on the front seats.
Controls and equip­ ment Safety first
Vehicle operation
& WARNING (continued)
• Seat covers can prevent the Advanced Airbag System from
recognizing child restraints or occupants on the front passenger
seat and prevent the side airbag in the seat backrest from
deploying properly.
• Never use cushions, pillows, blankets or similar items on the
front passenger seat. The additional padding will prevent the
weight-sensing mat in the seat from accurately registering the
child restraint or person on the seat and prevent the Advanced
Airbag System from functioning properly .
• If you must use a child restraint on the front passenger seat
and the child restraint manufa cturer's instructions require the use
of a towel , foam cushion or something else to properly position
the child restraint, make certain that the PASSENGER AIR BAG OFF
light comes on and stays on whenever the child restraint is
installed on the front passenger seat.
• If the PASSENGER AIR BAG OFF light does not come on and stay
on , immediately install child restraint in a rear seating position
and have the airbag system inspected by your authorized Audi
dealer .•
How the Advanced Airbag System
components work together
T he front Advance d Airbag System and the si de ai rbags s upple m ent
the p rotection offe red by the front thre e-point safety belts with
p retensioner s and load limiters and the adjustable head restraints
to hel p re d uc e th e ris k o f inj ury i n a w ide ra nge o f accid ent a nd
crash situations. Be s ure to read the important info rmation about
saf ety an d hee d the WARNI NGS in thi s c hap ter.
De ployment of th e Advanc ed Airbag System and the activation of
t he sa fe ty be lt pretensi oners de pend on the de ce lerat io n m easur ed
by the crash sensors and registered by the el ectronic control unit. _,
Vehicle care Do-it-yourself service Technical data

-Airbag system ----------------
& WARNING
(continued)
• Never recline the front passenger's seat to transport objects.
Items can also move into the area of the side airbag or the front
airbag during braking or in a sudden maneuver . Objects near the
airbags can become projectiles and cause injury, particularly when
the seat is reclined .
• Never tilt the front passenger seat backrest forward when the
vehicle is moving . An inflating airbag will force the backrest back­
ward and can injure rear seat occupants .
& WARNING
The fine dust created when airbags deploy can cause breathing
problems for people with a history of asthma or other breathing
conditions.
• To reduce the risk of breathing problems, those with asthma or
other respiratory conditions should get fresh air right away by
getting out of the vehicle or opening windows or doors.
• If you are in a collision in which airbags deploy, wash your
hands and face with mild soap and water before eating.
• Be careful not to get the dust into your eyes, or into any cuts or
scratches.
• If the residue should get into your eyes, flush them with
water. •
Monitoring the Advanced Airbag
System
Airbag monitoring indicator light ~
Two separate indicators monitor the function of the
Advanced Airbag System: the airbag monitoring indicator
light and the
PASSENGER AIR BAG OFF light.
The Advanced Airbag System (including the electronic control unit,
sensor circuits and system wiring) is monitored continuously to
make sure that it is functioning properly whenever the ignition is on.
Each time you turn on the ignition, the airbag monitoring indicator
light
ffl. will come on for a few seconds (self diagnostics).
The system must be inspected when the indicator light ~:
• does not come on when the ignition is switched on
• does not go out a few seconds after you have switched on the
ignition, or
• comes on while driving
If an airbag system malfunction is detected, the indicator light will
first start flashing to catch the driver's attention and then stay on
continuously to serve as a constant reminder to have the system
inspected immediately .
If a malfunction occurs that turns the front airbag on the passenger
side off, the PASSENGER AIR BAG OFF light will come on and stay on
whenever the ignition is on.
& WARNING
An airbag system that is not functioning properly cannot provide
supplemental protection in a frontal crash.
• If the airbag indicator light comes on, it means that there may
be something wrong with the Advanced Airbag System. It is .,._

Airbag syst em -----------------=~-
& WARN ING (co ntinued)
po ssib le th at the airb ag will inf late wh en it is not suppo sed to , or
will not inflate when it should.
• Hav e the air bag sy stem in spe cted immedi ate ly by y our autho­
ri zed Audi de aler. •
PASSENGER AIR BAG OFF light
Fig. 253 S ecti on from
t he in strum ent pan el:
PA SS ENGER A IR B AG
OFF light
The PA SS ENGER AIR BA G OFF light is located in the center o f the
instrument pane l
~ fig. 253.
The
PA SSENGER AIR BAG OFF light wil l come on and stay on to tel l
you when the front Advanced Airbag on the passenger side has
been turned off by the electronic control unit. Each time you turn on
the ignition, the
PA SS ENGER AIR B AG OFF light wi ll flash for a few
seconds and:
• will stay on if the front passenger seat is not occupied
• will stay on if there is a small child or chi ld restraint on the front
passenger seat
• will go out if the front passenger seat is occupied by an adult as
registered by the weight-sensing mat
T he
PAS SENGER AIR BAG OFF light mu st co me on and sta y on if the
ign ition is on and
Controls and equip­
ment Safety first
Vehicle operation
• a car bed has been installed on the front seat. or
• a rearward-facing chi ld restraint has been insta lled on the front
passenger seat, or
• a forward-facing child restraint has been insta lled on the front
passenger seat, or
• the weight registered on the front passenger seat is equal to or
less than the combined weight of a typica l 1 year -old restrained in
one of the rear-fac ing or forward -facing in fant restraints listed in
Federal Motor Vehicle Safety Standard 208 with which the Advanced
Airbag System in your vehicle was certified .
I f the front passenger seat is not occupied, the front airbag will not
deploy, and the
PA SS ENGER AIR BAG OFF light wi ll stay on. Never
install a rearward-facing child restraint on the front passenger seat,
the safest place for a child in any kind of child restraint is at one of
the seating positions on the rear seat~
page 243, "Child restraints
on the front seat -some important things to know" and~
page 263,
"Chi ld Safety".
If the PAS SEN GER AIR BAG OFF light come s on when one of the
conditions lis ted above is me t, be sure to check the ligh t regu lar ly
to make certain that the
PA SS ENGER AIR BA G OFF light stays on
continuously whenever the ignition is on. If the
PASSENGER AIR
BAG OFF
light does not appear on and does not stay on all the time,
stop as soon as i t is safe to do so and
• react ivate the system by turning the ignition of f and then turning
it on again;
• remove and reinstall the child restraint. Make sure that the ch ild
restraint is properly installed and that the safety belt for the front
passenger seat has been correctly routed through the chi ld restra int
as described in the child restraint manufacturer's instructions;
• make sure that the convertible locking feature on the safety belt
for the front passenger seat has been activated and that the safety
belt has been pulled tight. The belt must not be loose or have loops
of slack so that the sensor be low the safety belt latch on the seat can
do its job~
page 273. •
Vehicle care Do-it-yourself service Technical data

possible that an airbag will not deploy at a seating position where
the safety belt is being used but will inflate at the position where the
safety belt is not being used . It is important that nothing interfere
with the safety belt buckles so that the sensors can send the correct
information about safety belt use to the electronic control unit .
& WARNING
Changing the vehicle's suspension including use of unapproved
tire -rim combinations can change Advanced Airbag performance
and increase the risk of serious personal injury in a crash.
• Never install suspension components that do not have the
same performance characteristics as the components originally
installed on your vehicle.
• Never use tire-rim combinations that have not been approved
by Audi.
& WARNING
Items stored between the safety belt buckle and the center
console can cause the sensors in the buckle to send the wrong
information to the electronic control module and prevent the
Advanced Airbag System from working properly.
• Always make sure that nothing can interfere with the safety
belt buckles and that they are not obstructed.
Undeployed airbag modu les and pretensioners might be classified
as Perchlorate Material -special handling may apply, see
www.dtsc .ca.gov/ha zardouswaste/perchlorat e. When the vehicle or
parts of the restraint system including airbag modules and safety
belts with pretensioners are scrapped, all applicable laws and regu­
lations must be observed. Your authorized Audi dealer is familiar
with these requiremen ts and we recommend that you have your
dealer perform this service for you.•
Safety first
Side airbags
Description of side airbags Airbag
system
The airbag system
can provide supplemental protection
to properly restrained occupants.
Fig . 254 Side airbag
location in the driver's
sea t
The side airbags are located in the sides of the front seat backrests
~ fig. 254 and the rear backrest * facing the doors . They are identi ­
fied by the word "AIRBAG" .
The side airbag system basically consists of:
• the electronic control module and external side i mpact sensors
• the two side airbags located in the sides of the front backrests
• two rear side airbags (as an ordered
option)
• the airbag warning light in the instrument cluster.
The airbag system is mon itored e lectronica lly to make certain that
it is functioning prop erly at all times. Each time you turn on the igni ­
tion, the airbag system indicator light will come on for a few
seconds (se lf diagnostics) .
The side airbag system supplements the safety belts and can help
to reduce the risk of injury to the driver's , front and rea r*
passenger's upper torso on the side of the vehicle that is struck in a
s ide collision . The airbag dep loys on ly in side impacts and only
when the vehicle acceleration registered by the control unit is high
~
Vehicle care I I irechnical data

___ A_ ir_b _a_ g;:::;_ s--:.. y_s _t _e _m _________________________________________________ _
enough. If this rate is below the reference value programmed into
t he control unit, the side airbags will not be triggered, even though
the car may be badly damaged as a result of the collision . It is not
possible to define an airbag triggering range that wi ll cover every
possible angle of impact, since the circumstances will vary consid­
erably between one collision and another . Important factors
include, for example, the nature (hard or soft) of the impacting
object, the angle of impact, vehicle speed, etc.=>
page 259, "Impor ­
tant safety instructions on the side airbag system".
Aside from their normal safety function, safety belts work to help keep the driver or front passenger in position in the event of a side
collision so that the side airbags can provide protection .
The airbag system is
not a substitute for your safety belt . Rather, it
is part of the overa ll occupant restraint system in your vehicle .
Always remember that the side airbag system can on ly help to
protect you if you are wearing your safety be lt and wearing it prop­
erly . This is another reason why you should always wear your safety
belts, not just because the law requires you to do so=>
page 231,
"General notes" .
It is important to remember that while the supplemental side airbag
system is designed to reduce the likelihood of serious injuries, other
injuries, for example, swel ling, bruising, and minor abrasions can
a lso be associated with deployed s ide airbags. Remember too, side
airbags wil l deploy only once and only in certain kinds of accidents
- your safety belts are always there to offer protection.
Vehicle damage, repair costs or even the lack of vehicle damage are not necessari ly an indication of over -sensitive or failed airbag acti ­
vation. In some collisions , both front and side airbags may inflate.
Remember too, that airbags will deploy only once and only in
certain kinds of collis ions - your safety belts are always there to
offer protection in those accidents in which airbags are not
supposed to deploy or when they have already dep loyed.
The sid e a irba g sy stem w ill not deploy :
• when the ignition is turned off •
in side collisions when the acceleration measured by the sensor
is too low
• in front -end collisions
• in rear-end co llisions
• in ro llovers .
In some types of accidents the front airbags, side curtain airbags
and side airbags may be triggered together .
& WARNING
• Safety b elt s and the airb ag sy ste m will only prov id e pr ote ction
whe n occ upant s are in the prop er se ating po sit io n
=> pag e 259.
• If the airb ag indic ator light come s on w hen the v ehicl e is bei ng
u sed , h av e the syste m inspe cte d immedi ate ly by y our authoriz ed
Audi de aler . Th e ai rbag m ay not w ork properly when the vehicle
a ccel erat ion in a side collision is high e nough to ac tivate th e
a ir bag .•
Hovv supplemental side airbags vvork
Side airbags deploy instantly and can help reduce the risk of upper torso injuries for occupants who are properly
restrained.
F ig . 255 Inf late d sid e
a ir bags o n left side of
v ehi cle, rea r si de
a ir bag opti on al eq uip-
m ent .,

___ A_ ir_b _a_ g;:::;_ s--:.. y_s _t _e _m _________________________________________________ _
& WARNING (continued)
-Never carry any objects or pets in the deployment space
between them and the airbags or allow children or other
passengers to travel in this position .
• Always use the built-in coat hooks only for lightweight
clothing. Never leave any heavy or sharp-edged objects in the
pockets that may interfere with side airbag deployment and can
cause personal injury in an accident .
• Always prevent the side airbags from being damaged by heavy
objects knocking against or hitting the sides of the seatbacks.
• The airbag system can only be triggered once . If the airbag has
been triggered, the system must be replaced by an authorized
Audi dealership .
• Damage (cracks, deep scratches etc.) to the original seat covers
or to the seam in the area of the side airbag module must always
be repaired immediately by an authorized Audi dealer.
• If chi ldren are seated improperly, their risk of injury increases
in the case of an accident:::::,
page 263, "Child Safety".
• Never attempt to modify any components of the airbag system
in any way.
• In a side collision , side airbags will not function properly if
sensors cannot correctly measure increasing air pressure inside
the doors when air escapes through larger, unclosed openings in
the door panel.
-Never drive with interior door trim panels removed.
- Never drive when parts have been removed from the inside
door panel and the openings they leave have not been properly
closed.
- Never drive when loudspeakers in the doors have been
removed unless the speaker holes have been properly closed .
- Always make certain that openings are covered or filled if
additional speakers or other equipment is installed in the
inside door panels .
& WARNING (continued)
-Always have work on the doors done by an authorized Audi
dealer or qualified workshop . •
Side curtain airbags
Description of side curtain airbags
The side curtain airbags can provide supplemental
protection to properly restrained occupants.
Fig. 256 Side curtain
airbags , driver 's side:
location
The side curtain airbags are located on both sides of the interior
above the front and rear side windows:::::, fig. 256 . They are identi­
fied by the word "AIRBAG" on the windshield frame and the center
roof pillar.
The side curtain airbag system supplements the safety belts and can help to reduce the risk of injury for occupants' heads and upper
torso on the side of the vehicle that is struck in a side collision. The
side curtain airbag inflates only in side impacts and only when the
vehicle acceleration registered by the control unit is high enough. If
this rate is below the reference value programmed into the control
unit, the side airbags will not be triggered, even though the car may
be badly damaged as a result of the collision. It is not possible to
define an airbag triggering range that will cover every possible ..,