2016 AUDI A4 warning light

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0 ::..:: co ..... ..... greater detail below. Because the front passen­
ger seat contains important parts of the Ad­
vanced A irbag System, you must take care to pre ­
vent 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 Adv anced Airb ag Sy stem con sist s
of the following :
-Crash sensors in the front of the vehicle that
measure vehicle accelerat ion/decelerat io n to
provide information to the Advanced Airbag
System about the severity of the crash .
- An electronic control un it, with integrated
crash sensors fo r front and side impacts . The
contro l unit "decides" whether to fire the front
airbags based on the information received from
the crash sensors. The control unit also "de ­
cides" whether the safe ty be lt pretens ioners
sho uld be activated.
- An Advanced Airbag wi th gas generato r and
contro l valve for the driver ins ide the steer ing
whee l hub .
- An Advanced Airbag with gas generator and
contro l valve inside the instrument pane l for
the front passenger.
- A weight -sensing mat under t he upho lstery
padding of the front passenger seat cushion
that meas ures the total weight on the seat . The
information registered is sent continuously to
the electron ic control unit to regulate dep loy­
ment of the front Adva need A irbag on the pas­
senger side.
- An airbag monitoring system and indicator
light i n the instrument cluster
¢ page 148.
-A sensor in each front seat registers the dis­
tance between the respective seat and the
steering wheel or instrument panel. The infor­
mation reg istered is sent cont inuous ly to the
electroni c control unit to regulate deployment
of the fro nt Adv a need A irbags.
- T he
PASS EN GE R AIR BAG OFF light comes on
and stays on in the center of the instrument
pane l¢
page 148, fig . 155 a nd tells you when
the fron t Advan ced Airbag on the passenge r
side has been turned off.
- A se nsor below the safe ty bel t lat ch fo r th e
front seat passenger to meas ure the tens ion on
Airb ag sys tem
the sa fe ty belt. The tension on the safety belt
and the weight registered by the weight-sens­
ing mat help the contro l unit "decide" whether
the front airbag for the front passenger seat
should be turned off or not¢
page 139, Child
restraints on the front seat -some important
things to know.
- A sensor in the safety belt latch for the driver
and for the front seat passenger that senses
whether that safety belt is latched o r not and
t ransmits this information to t he electronic
cont rol un it.
_& WARNING
Da mage to the front passenge r seat can pre­
vent the front airbag from working properly.
- Imp roper repair or disassembly of the fro nt
passenger and driver seat will p revent the
Advanced Airbag System from f unct ioning
p roperly.
- Repairs to the front passenger seat must be
performed by qualified an d properly trained
wo rkshop personne l.
- Never remove the front passenge r or driver
seat from the vehicle.
- Never remove the upholstery from the front
passenger seat.
- Never disassemble o r remove par ts from the
seat o r disconnect w ires from it.
- Never ca rry sharp objects in your pocke ts or
p la ce them on the seat. If the weight-sens­
ing mat in the passenger seat is punctu red
it cannot work proper ly.
- Never carry things on your lap or carry ob­
jects on the passenge r seat. S uch items can
increase the weight reg istered by the
weight-sensing mat and send the wrong in­
formation to the a irbag control unit.
- Never store items unde r the front passenger
seat. Parts of the Advanced Airbag System
under the passenger seat could be dam­
aged, p reventing them and the airbag sys­
tem from worki ng p roper ly.
- Never p lace seat covers or replacement up­
holstery tha t have not been specifically ap­
p roved by A udi on the front seats.
- Seat covers can prevent the Advanced A ir­
bag Sys tem from recognizing chi ld
145

Airbag syste m
restraints or occupants on the front passen­
ger 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-sens ing mat in the seat from accu­
rately reg istering the ch ild restraint or per­
son on the seat and prevent the Advanced
Airbag System from funct ioning prope rly.
- If you must use a child restraint on the front
passenge r seat and the child restraint man­
ufact urer's instructions require the use of a
towel, foam cushion or something else to properly position the chi ld restraint, make
certain that the
PASSENGER AIR BAG O FF
light comes on and stays on whenever the
child restraint is installed on the front pas­
senger seat.
- If the
PASSENGER AIR BAG O FF light does
not come on and stay on, immediately in­
stall child restrai nt in a rear seating position
and have the airbag system inspected by
you r authorized Aud i deale r.
How the Advanced Airbag System
components work together
The front Advanced Airbag System and the side
ai rbags supplement the protection offered by the
front three-point safety belts with pretensioners and load limiters and the adjustable head re ­
stra ints to help reduce the r isk of injury in a wide
range of accident and crash situations. Be sure to
read the important information about safety and heed the WARNINGS in th is chapter .
Dep loyment of the Advanced Airbag System and
the activation of the safety belt pretensioners de­
pend on the deceleration measured by the crash
sensors and registered by the electronic control
unit . Crash severity depends on speed and decel­
era tion as we ll as the mass and stiffness of the
vehicle or object invo lved in the crash.
On the passenger s ide, regardless of safety belt
use, the a irbag will be t urned off if the weight on
the passenge r seat is less than the amount p ro­
g rammed in the e lectron ic cont rol unit . T he front
146
airbag on the passenger side will also be turned
off if one of the child safety seats that has been
certified under Federal Motor Vehicle Safety
Standard 208 has been recogn ized on the seat.
The
PAS SEN GER AI R BA G OFF light comes on
and stays on to te ll you when the front Advanced
Airbag on the passenger side has been turned off
¢ page 139, Child restraints on the front seat ­
some important things to know .
.&_ WARNING
To reduce the risk of injury when an airbag in­
f lates, always wear safety belts properly.
- I f you are un restrained, leaning forward, sit­
ting sideways or ou t of position i n any way,
your ris k of injury is much highe r.
- You will a lso receive ser ious injuries and
could even be killed if yo u are up against the
airbag or too close to i t when it inflates -
even with an Advanced Airbag
r::!;>page 138.
More important things to know about front
airbags
Fig. 154 Inflated front a irbags
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Safety be lts are important to help keep front
seat occupants in the proper seated position so
that airbags can unfo ld properly and prov ide sup­
plemental protection in a fronta l co llision.
The front airbags a re designed to provide addi­
tional protection for the chest and face of the driver and the front seat passenger when:
- safety belts are worn properly,
- t he seats have been positioned so that t he oc-
cupant is properly seated as far as possib le
from the airbag,
Ill-

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0 ::..:: co ..... ..... -and the head restraints have been properly ad -
justed.
Because airbags inflate in the blink of a n eye w ith
great for ce, things you have on you r lap or have
p laced on the seat cou ld become dangerous pro ­
jectiles, and be pushed into you if the airbag in ­
flates.
When an a irbag deploys, fine dust is released .
This is normal and is not caused by a fire in the
vehicle. This dust is made up mostly of a powder
used to lubricate the airbags as they deploy. It
could irr itate skin.
It is important to remember that while the sup­
p lemental airbag system is designed to reduce
the likelihood of ser ious injuries, other inj uries,
for example swell ing, bruising and minor abra­
sions, can also happen when airbags inflate. Air­
bags do not protect the arms or the lower parts
of the body . Front airbags only supplement the
three po int safety belts i n some fronta l co llisions
i n which the veh icle decelerat ion is high enough
to deploy the airbags.
F ront airbags will not deploy:
- if the ignit ion is switched off when a crash oc -
curs,
- in s ide collisions,
- in rear-end collisions,
- in rollovers,
- when the crash decelerat ion measured by the
airbag system is less than the minimum thresh­
o ld needed for airbag deployment as registered
by the electronic contro l unit .
Th e front passeng er airbag will a lso not
deplo y:
- when the front passenger seat is not occupied,
- when the weight on the front passenger seat as
sensed by the Advanced Airbag System indi­
cates that the front airbag on the passenger
s ide has to be turned off by the electronic con­
trol unit (the
P A SSENGER AIR B AG OFF light
comes on and stays on).
A WARNING
Sitting in the wrong pos ition can increase the
r isk of se rious injury in c rashes .
Airb ag sys tem
-To reduce the risk of injury when the ai rbags
inflate, the driver and passengers must al­
ways sit in an upright posit ion, must not
lean aga inst or place any part of their body
too close to the area where the airbags are located.
- Occupants who are unbelted, out of posit ion
or too close to the airbag can be seriously in jur ed by an airbag as it unfolds with g reat
for ce in the blink of an eye
Q page 139.
A WARNING
A child in a rearward-facing child safety seat
i nsta lled on the front passenger seat will be
seriously injured and can be k illed if the front
a irbag inflates - even with an Advanced Airbag
System .
- The inflating airbag will hit the child safety seat or infant ca rrier with great force and
will smash the child safety seat and child aga inst the backrest, center armrest, door
or roof.
- Always install rear-fac ing child safety seats
on the rear seat.
- If you must install a rea rwa rd facing child
safety seat on the front passenger seat be ­
cause of exceptional circumstances and the
PA SS ENGER AIR BAG OFF light does not
come on and stay on, immediately install
the rea r-facing child safety seat in a rear
seating position and have the a irbag system
inspected by your au thori zed A udi dealer.
A WARNING
Objects between you and the airbag will in­
crease the risk of injury in a crash by interfer­
ing with the way the airbag unfolds or by be ­
ing p ushed into you as the airbag inflates .
- Never hold things in yo ur hands or on your
lap when the vehicle is in use .
- Never transport items on or in the area o f
the front passenger seat . Objects could
move into the area of the front airbags dur­
ing braking or other sudden maneuver and
become dangerous projectiles that can
cause serious persona l injury if the airbags
inflate.
147

Airbag syste m
-Never place or attach accessories or other
objects (such as cupholders, telephone
brackets, large, heavy or bulky objects) on
the doors, over or near the area marked "AIRBAG" on the steering wheel, instru­
ment panel, seat backrests or between
those areas and yourself. These objects
could cause injury in a crash, especially
when the airbags inflate.
- Never recline the front passenger's seat to
transport objects. Items can also move into
the area of the side airbag or the front a ir­
bag during braking or in a sudden maneu­
ver. Objects near the airbags can become projectiles and cause injury, particularly
when the seat is reclined.
A WARNING
The fine dust created when airbags deploy can
cause breath ing problems for people w ith a
history of asthma or other breathing condi­
t ions.
- To reduce the risk of breathing problems,
those w ith asthma or other respiratory con­
ditions should get fresh air right away by
gett ing out of the vehicle o r opening w in­
dows or doors.
- If you are in a collision in which airbags de­
ploy, wash your hands and fa ce with mild
soap and water before eat ing.
- Be careful not to get the dust into your eyes,
o r into any cuts or sc ratches.
- If the resid ue should get into yo ur eyes,
flush them with water.
Monitoring the
Advanced Airbag System
~i ( USA model s) /!f (Canada models )
Airbag monitoring indicator light
Two separate indicators monitor the function of
the Advanced Airbag System: the airbag moni­
toring indicator light and the
PASSENGER AIR
BAG OFF light.
The Advanced Airbag System (including the elec­
tronic co ntrol unit, senso r ci rcui ts and system
wiring) is monitored continuously to make su re
148
that it is functioning properly whenever the igni­
tion is on. Every time you turn on the ignition, the
airbag system indicator light
II (USA models) I
E,I (Canada models) will come on for a few sec­
onds (function check).
The system must be inspected wh en th e
indicator light
fl ( USA models) 1m
( Canada models ):
- does not come on when the ignition is sw itched
on,
- does not go out a few seconds after you have
sw itched on the igni tion, 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 sys­
tem inspected immediately .
If a malfunction occurs that turns the front air­
bag on the passenger side off, the
PASSEN GER
AIR BAG OFF
light will come on and stay on
whenever the ignition is on .
A WARNING
An airbag system that is not functioning prop­
e rly cannot provide supp lemental protection
i n a fronta l crash.
- If the airbag ind icator light ¢
page 19
comes when the veh icle is being used, have
t he system inspected immedia tely by your
author ized Audi dealer . It is possib le that
the airbag will inflate when it is not sup ­
posed to, or wi ll not inflate when it should .
PASSENGER AIR BAG OFF light
Fig . 155 Se ction from the inst rument panel: PASSENGER
AIR BAG O FF light .,,_

Airbag syste m
-the adu lt on the front passenger seat is proper ­
ly seated on the center of the seat cushion with
his or her back up against the backrest and the
backrest is not reclined
c> page 122, Correct
passenger seating positions,
-the adu lt is not taking weight off the seat by
holding on to the passenger assist handle
above the front passenger door or supporting
their we ight on the armrest,
- the safety belt is being properly worn and that
there is not a lot of slack in the safety belt web­
bing,
- accessory seat covers or cushions or other
th ings that may cause an incorrect read ing or
impression on the weight-sensing mat under
the upho lstery of the seat have been removed
from the front passenge r seat,
- a safety be lt extender has not been left in the
safety belt latc h for the front passenge r seat.
In addition to the
PASSE NGER AIR BAG OFF
light in the center of the instrument panel, the
message
PASSENGER AIR BAG OFF or PASSEN­
GER AIR BAG ON
w ill briefly appear in the inst ru­
ment cluster display . T his is to inform the driver
of the current front passenger airbag status.
Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
An airbag system that is not funct ion ing prop­
er ly cannot p rovide supplemental p rotection
in a frontal crash.
- If the airbag indicato r light
r=>page 19
comes when the vehicle is be ing used, h ave
the system inspected immediate ly by yo ur
authorized Aud i dealer. It is possible that
the airbag will inflate when it is not s up­
posed to, or will not inflate when it should.
A WARNING
If the front airbag inflates, a child without a
child restraint, in a rearward-facing child safe­
ty seat or in a forward-facing child restraint
that has not been properly installed will be
ser iously injured and can be killed .
150
-Even though your vehicle is equipped with
an Advanced A irbag System, make certain
that all children, espec ia lly 12 years and
younger, always ride on the back seat prop­
erly restrained for their age and s ize.
- Always install forward or rear-facing child
safety seats on the rear seat -even with an
Advanced A irbag System.
- If you must install a rearward-facing child
safety seat on the front passenger seat be­
cause of exceptional circumstances and the
PASSENGER AIR BAG OFF l ight does not
appear and s tay on, immedi ately ins tall the
rear-facing child safety seat in a re ar seat ing
position and have the a irbag system in ­
spected by your a uthorized Audi dea ler.
- A t ight tether or other s trap on a rearward­
facing chi ld restraint attached to the front
passenger seat can put too much pressure
on the weight-sensing mat in the seat and
register more weight than is actually on the
seat. The heavier weight registered can
make the system work as thoug h an adu lt
were on the seat and deploy the Advanced
Airbag when it must be suppressed causing
serious or even f atal injury to the child.
- If, in exceptional circumstances, you must
install a forward-fa cing child res traint on
the front p assenge r seat, always move the
seat into i ts rearmost posi tion in the sea t's
fore and aft ad justment range, as far away
from the ai rbag as possible . The back rest
must be adjusted to an upr ight position.
Make sure that the
PASSENGER AIR BAG
OFF
li ght comes on and stays on all the time
wheneve r the ignit ion is switched on.
A WARNING
- If the PASSENGER AIR BAG OFF light does
not go out when an adult is sitting on the
front passenger seat afte r taking the steps
described above, make s ure the adult is
p roper ly sea ted and restra ined at one o f the
rear sea ting posit ions .
- Have the ai rbag system inspec ted by your
author ized Audi dealer befo re t ransporting
anyone on the front passenger seat.

Airbag system
@ For the sake of the environment
Undeployed airbag modu les and pretension­
ers might be classified as Perchlorate Materi­
al -special handling may apply, see
www.dtsc.ca.gov/hazardouswaste/perchlo­ rate . When the vehicle or parts of the re­
straint system including airbag modules safe­
ty belts with pretens ioners are scrapped, all
applicable laws and regulat ions must be ob­
served. Your authorized Audi dealer is familiar
with these requirements and we recommend
that you have your dealer perform this service
for you.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
cha nge the way that the Advanced Airbag System
pe rforms in a crash. For example, using tire-r im
comb inat ions not approved by Audi, lower ing the
veh icle, changing the stiffness of the suspens ion,
including the spr ings, suspension struts, shock
absorbers etc . can change the forces that are
measured by the airbag sensors and sent to the
electronic control unit . Some suspens ion changes
can, for example, increase the force levels meas­
ured by the sensors and make the airbag system
deploy in crashes in wh ich it would not deploy if
the changes had not been made. Other ki nds of
changes may reduce the force levels measured by
the sensors and preven t the airbag from deploy­
ing when it should .
A WARNING
Changing the vehicle's suspension including
use of unapproved tire-rim combinations can
change Advanced A irbag performance and in ­
crease the risk of serious personal injury in a
crash.
- Never install suspension components that
do not have the same performance charac­
teristics as the components originally insta l­
led on your veh icle.
- Never use tire-rim comb inations that have
not been approved by Audi.
152
A 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 A irbag System from working
properly.
- Always make sure that nothing can inte rfe re
w ith the safety belt buckles and that they
are not obstructed.
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
Fig. 156 S ide ai rbag locatio n in the dr ive r's seat
The side airbags are located in the sides of the
front seat backrests
¢ fig . 156 and the rear back­
rest facing the doors. They are identified by the
word "AIRBAG".
The side airbag system basically consists of:
-the electronic control module and external side
impact sensors
- the two airbags located in the sides of the front
backrests and the two airbags" located in the
rear backrest
- the airbag warning light in the instrument clus-
ter.
The airbag system is monitored electronica lly to
make certain that it is functioning proper ly at all
times. Each time you turn on the ignition, the air­
bag system indicator light will come on for a few
seconds (self diagnostics). .,,.

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The side airbag system supplements the safety be lts and can help to reduce the risk of injury to
the dr iver's and front passenger's upper torso on
the side of the vehicle that is struck in a side col­
lision . The airbag deploys on ly in side impacts
and only when the vehicle acceleration reg istered
by the control unit is h igh enough. If this rate is
be low the reference va lue programmed into the
control unit, the s ide airbags will not be tr ig­
gered, even though the car may be badly dam ­
aged as a result of the collision.
It i s not possib le
to define an airbag triggering range that wi ll cov­
er every possible angle of impact, since the cir ­
cumstances will vary considerably between one
coll is ion and another. Important factors include,
for example , the nature (hard or soft) of the im­
pacting object, the ang le of impact, vehicle
speed , etc .
r::;;, page 154, Important safety in­
structions on the side airbag system .
Aside from their normal safety function, safety
be lts work to he lp keep the driver or front pas­
senger in pos it ion in the event of a side collision
so that the s ide a irbags can provide p rotection.
The airbag system is
not a substitute for your
safety belt . Rather, it is part of the overall occu­
pant restraint system i n your veh icle . Always re­
member that the s ide airbag system can only
he lp to p rotect yo u if you a re wea ring your safety
be lt and wea ring it properly. This is another rea­
son why you shou ld always wear your safety
be lts, not just because the law requi res you to do
so
r::;;, page 130, General information.
It is important to remember that while the s up­
p lemental side ai rbag system is designed to re­
duce the like lihood of serious injur ies, other inju­
ries, for example, swelling, bruising, and minor
abrasions can a lso be associated with deployed
side airbags. Remember too , side airbags will de­
ploy only once and only in certain kinds of acci­
dents -your safety belts are always t here to offer
p rotection.
Vehicle damage, repair costs or even the lack of
vehicle damage are not necessarily an indication
of over-sensitive o r failed airbag activation . In
some coll is io ns, both front and s ide a irbags may
in flate. Remember too, that airbags will deploy
only once and only in ce rtain k inds of coll is ions -
Airb ag sys tem
your safety belts are always there to offer protec­
tion in those accidents in which airbags are not
s u pposed to deploy or when they have already
deployed .
The side airbag system w ill n ot deploy:
- when t he ignit io n i s t urned off
- in side co llisions whe n the acceleration meas-
ured by the sensor is too low
- in front-end coll is io ns
- in rear-end col lisions
- in rollovers .
In some types of accidents the front airbags, side
curtain airbags and side airbags may be triggered
together .
A WARNING
--Safety belts and the airbag system will only
p rov ide protect ion when occupants are in
the prope r seat ing pos ition
r::;;, page 154 .
- If the ai rbag ind icator light r::;;, page 19
comes when the veh icle is being used, have
the system inspected immedia tely by your
a uthor ized Audi dealer.
It is possib le th at
the airbag will inflate when i t is not sup­
posed to, or w ill not inf late w hen it should.
How supplemental side airbags work
Side airbags deploy ins tantly and can help re­
duce the risk of upper torso injuries for occu­
pants who ore properly restrained.
F ig. 157 In fla ted s ide airba gs on left side of vehicle
-,..
"' -~ a, Cl)
When the system is triggered, the airbag is filled
with propellant gas and breaks through a seam in
the seat s urface area marked "AIRBAG" .
It ex-
pands between the side trim panel a nd the .,.
153

Airbag syste m
passenger. In order to he lp provide this add ition­
al protection, the side airbag must inflate within
a fraction of a second at very high speed and w ith
great force. The supplemental side airbag could injure you if your seating position is not proper or
upright or if items are located in the area where
the supplemental side airbag expands . This ap­
plies especially to children
q page 158, Child
safety.
Supplemental side ai rbags inf late be ­
tween the occ upan t and the door pane l on the
side of the vehicle that is struck in certa in side
collision
q fig . 157.
Although they are not a sof t pillow, they ca n
"c ushion" the impact and in t his way they can
he lp to reduce the risk of injury to the upper part
of the body .
A fine dust may deve lop when the airbag deploys.
This is normal and does not mean there is a fire
in the vehicle.
Important safety instructions on the side
airbag system
Airbags ore only supplemental restraints . Always
properly wear safety belts and ride in a proper
seating position.
There is a lot that yo u and your passengers must
know and act accord ingly to help the safety be lts
and airbags do the ir job to provide supplemental
protection.
A WARNING
An inflating side airbag can cause serious or
fatal injury. Improperly wearing safety belts
and improper seating positions increase the
r isk of se rious personal injury and death
w henever a vehicle is being used.
- In order to reduce the risk of injury when
the supplemental s ide airbag inflates:
- Always sit in an upright position and never
lean aga inst the area where the s upple-
mental side airbag is located.
- Never let a chi ld or anyone else rest their
head against the side trim panel in the
area where the supp lemental s ide airbag
inflates.
154 -
Always make sure that safety belts are
worn correctly,
- Do not let anyone sitting in the front seat
put their hand or any other parts of their
body out of the window.
- Always make sure that the side airbag can
inflate w ithout interference.
- Never install seat covers or replacement
upholstery ove r the front seatbacks that
have not been specifica lly approved by
A udi.
- Never use addi tional seat cush ions that
cover the areas where the side airbags de­
ploy .
- Damage to the orig inal se at cove rs or to
the seam in the area of the s ide airbag
module must a lways be repaired immedi ­
ate ly by an authorized Audi dealer.
- Objects be tween you and the airbag can in­
crease the r is k of injury in an acc ident by in­
terfering with the way the airbag unfolds or by being p ushed into you as the airbag in­
flates.
- Never place or attach accessor ies or other
obje cts (s uch as cupholders, telephone
bracke ts, or even l arge, bulk y objec ts) on
the doors, over or near the area marked
"AIRBAG" on the seat backrests .
- Such objec ts and accessories can be come
dange rous projecti les and cause injury
when the supplemental side airbag de­ ploys.
- Never carry any objects or pets in the de­
ployment space between them and the
airbags or allow children or other passen­
gers to trave l in this position.
- Always use the b uilt-in coat hooks only fo r
lightweight clothing. Never leave any heavy
or sharp-edged objects in the pockets that
may inte rfere with s ide a irbag deployment
a nd 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 a irbag system can only be triggered
once . If the airbag has been triggered, the
system must be replaced by an autho rized
Aud i dea le rship.
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