2019 AUDI TT ROADSTER sensor

Airbag system


sitting on the seat. The presence of an ob-
ject could cause the passenger front airbag
to be turned on when it should be off, or
could cause the airbag to work in a way that
is different from the way it would have
worked without the object on the seat.

ZX WARNING
The fine dust created when airbags deploy can
cause breathing problems for people with a
history of asthma or other breathing condi-
tions.
—To reduce the risk of breathing problems,
those with asthma or other respiratory con-
ditions should get fresh air right away by
getting out of the vehicle or opening win-
dows or doors.
— Ifyou are in a collision in which airbags de-
ploy,
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 2] light and
the PASSENGER AIR BAG OFF 4; ON @ light.
The Advanced Airbag System as well as the side
airbags with ejection mitigation features (includ-
ing the electronic control unit, sensors and sys-
tem wiring) are all monitored continuously to
make sure that they are functioning properly
whenever the ignition is on. Every time you turn
on the ignition, the airbag system indicator light
B¥ will come on for a few seconds (function
check).
The system must be inspected when the
indicator light Ba:
— does not come on when the ignition is switched
on,
200
— 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 come on to serve as a constant
reminder to have the system inspected immedi-
ately.
If a malfunction occurs that turns the front air-
bag on the passenger side off, the PASSENGER
AIR BAG OFF 8%; light will come on and stay on
whenever the ignition is on.

Z\ WARNING
An airbag system that is not functioning prop-
erly cannot provide supplemental protection
in a frontal crash.
— If the airbag indicator light > page 18
comes when the vehicle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possible that
the airbag will inflate when it is not sup-
posed to, or will not inflate when it should.

PASS eae VNR) de ALO) MU Lig


Fig. 158 Section from the headliner: PASSENGER AIR BAG
OFF 2%; ON @ light
The PASSENGER AIR BAG OFF %; ON @ light is
located in the headliner > fig. 158.
The PASSENGER AIR BAG OFF %; light will come
on and stay on to tell you when the front Ad-
vanced Airbag on the passenger side has been
turned off by the electronic control unit. If the
bulb for the PASSENGER AIR BAG OFF #%; ON @
light burns out, the airbag indicator light ka will
come on to signal a malfunction in the Advanced
Airbag System. Although the burned-out bulb >

Airbag system


the vehicle battery with a pyrotechnic circuit
interrupter.
— Work on the pyrotechnic circuit interrupter
must only be performed by a qualified
technicians who have the experience, in-
formation and special tools necessary to
perform the work safely.
— If the vehicle or the circuit interrupter is
scrapped, all applicable safety precautions

must be followed.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag System
performs ina crash. For example, using tire-rim
combinations not approved by Audi, lowering the
vehicle, changing the stiffness of the suspension,
including the springs, suspension struts, shock
absorbers etc. can change the forces that are
measured by the airbag sensors and sent to the
electronic control unit. Some suspension changes
can, for example, increase the force levels meas-
ured by the sensors and make the airbag system
deploy in crashes in which it would not deploy if
the changes had not been made. Other kinds of
changes may reduce the force levels measured by
the sensors and prevent the airbag from deploy-
ing when it should.

Z\ WARNING
Changing the vehicle's suspension including
use of unapproved tire-rim combinations can
change Advanced Airbag performance and in-
crease the risk of serious personal injury ina
crash.
— Never install suspension components that
do not have the same performance charac-
teristics as the components originally instal-
led on your vehicle.
— Never use tire-rim combinations that have
not been approved by Audi.

204

Knee airbags
Pye al) CooL Aide}
The knee airbag system can provide supplemen-
tal protection to properly restrained front seat
occupants.
2 8
2
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Fig. 159 Driver's knee airbag
The driver knee airbag is in the instrument panel
underneath the steering wheel > fig. 159, the
airbag for the passenger is at about the same
height in the instrument panel underneath the
glove compartment.
The knee airbag offers additional protection to
the driver's and passenger's knees and upper and
lower thigh areas and supplements the protec-
tion provided by the safety belts.
If the front airbags deploy, the knee airbags also
deploy in frontal collisions when the deployment
threshold stored in the control unit is met
= page 198, More important things to know
about front airbags.
In addition to their normal safety function, safe-
ty belts help keep the driver or front passenger in
position in a frontal collision so that the airbags
can provide supplemental protection.
The airbag system is not a substitute for your
safety belt. Rather, it is part of the overall occu-
pant restraint system in your vehicle. Always re-
member that the airbag system can only help to
protect you if you are wearing your safety belt
and wearing it properly. This is why you should al-
ways wear your safety belt, not just because the
law requires you to do so > page 182, General
notes.

Airbag system

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airbag system
Airbags are only supplemental restraints. Always
wear safety belts correctly and ride in a proper
seating position.
There is a lot that you and your passenger must
know and do to help the safety belts and airbags
to provide supplemental protection.

ZA WARNING
An inflating knee airbag can cause serious in-
jury. Wearing safety belts incorrectly and im-
proper seating positions increase the risk of
serious personal injury and death whenever a
vehicle is being used.
— The knee airbag system cannot protect you
properly if you are seated too close to any of
the airbag locations. When adjusting their
seat positions, it is important that both the
driver and the front passenger keep their
upper bodies and knees at the following
minimum safe distances:
—at least 10 in (25 cm) between the chest
and
the steering wheel/instrument panel.
—at least 4 in (10 cm) between the knees
and the lower part of the instrument pan-
el.
— The risk of personal injury increases if you
lean forward or to the side, or if the seat is
improperly positioned and you are not wear-
ing your safety belt. The risk increases even
more should the airbag deploy.
— Always make sure that the knee airbag can
inflate without interference. Objects be-
tween you and the airbag can increase the
risk of injury in an accident by interfering
with the way the airbag deploys or by being
pushed into you as the airbag deploys.
— Never let anybody, especially children or
animals ride in the footwell in front of the
passenger seat. If the airbag deploys, this
can result in serious or fatal injuries.
— Never carry objects of any kind in the foot-
well area in front of the driver's or pas-
senger's seat. Bulky objects (shopping
bags, for example) can interfere with or
prevent proper deployment of the airbag.

206

Small objects can be thrown through the
vehicle if the airbag deploys and injure you
or your passenger.
— Make sure there are no cracks, deep scratch-
es or other damage in the area of the instru-
ment panel where the knee airbags are lo-
cated.
— If children are incorrectly seated, their risk
of injury increases in a collision > page 210,
Child safety.

Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.

The side airbags are located in the sides of the
front seat backrests > fig. 161 facing the doors.
They are identified by the word “AIRBAG”.
The side airbags installed for the front seating
positions have been designed and certified to
help reduce the risk of injury that can be caused
by airbags when they inflate, particularly when
the occupant sitting next to it is not seated prop-
erly. The side airbag for the front passenger seat
can be used with properly installed child re-
straints. Please be sure to read the important in-
formation and warnings whenever using a child
restraint in a vehicle: Safety belts > page 182,
Airbag system > page 189, Child safety
=> page 210.
The side airbag system basically consists of:
— the electronic control module and external side
impact sensors

8S58012721BA
Airbag system

— the two side airbags located in the sides of the
front backrests
— the airbag warning light in the instrument clus-
ter.
The airbag system is monitored electronically to
make certain that it is functioning properly 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).
The side airbag system supplements the safety
belts and can help to reduce the risk of injury to
the driver's and front passenger's upper torso on
the side of the vehicle that is struck in a side col-
lision. The airbag deploys in side impacts and on-
ly 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 air-
bag triggering range that will cover every possi-
ble angle of impact, since the circumstances will
vary considerably between one collision and an-
other. Important factors include, for example,
the nature (hard or soft) of the impacting object,
the angle of impact, vehicle speed, etc.
= page 208, Important safety instructions on
the side airbag system.
Aside from their normal safety function, safety
belts work to help keep the driver or front pas-
senger 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 overall occu-
pant restraint system in your vehicle. Always re-
member that the side airbag system can only
help to protect you if you are wearing your safety
belt and wearing it properly. This is another rea-
son why you should always wear your safety
belts, not just because the law requires you to do
so > page 182, General notes.
It is important to remember that while the sup-
plemental side airbag system is designed to re-
duce the likelihood of serious injuries, other inju-
ries, for example, swelling, bruising, friction
burns and minor abrasions can also be associated
with deployed side airbags. Remember too, side
airbags will 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 necessarily an indication
of over-sensitive or failed airbag activation. In
some collisions, both front and side airbags may
inflate. Remember too, that airbags will deploy
only once and only in certain kinds of collisions -
your safety belts are always there to offer protec-
tion in those accidents in which airbags are not
supposed to deploy or when they have already
deployed.
The
side airbag system will not deploy:
— when the ignition is switched off
— in side collisions when the acceleration meas-
ured by the sensor is too low
—in front-end collisions
—in rear-end collisions
—in rollovers.
In some types of accidents the front airbags and
side airbags may be triggered together.

Z\ WARNING
— Safety belts and the airbag system will only
provide protection when occupants are in
the proper seating position > page 208.
— If the airbag indicator light > page 18
comes when the vehicle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possible that
the airbag will inflate when it is not sup-
posed to, or will not inflate when it should.

207

8S8012721BA
Airbag system



by being pushed into you as the airbag in-
flates.
— Never place or attach accessories or other
objects (such as cup holders, telephone
brackets, or even large, bulky objects) on
the doors, over or near the area marked
“AIRBAG” on the seat backrests.
— Such objects and accessories can become
dangerous projectiles 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 air-
bags or allow children or other passengers
to travel in this position.
— 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 children are seated improperly, their risk
of injury increases in the case of an accident
= page 210, Child safety.
— Never attempt to modify any components of
the airbag system in any way.
— Ina side collision, side airbags will not func-
tion properly if sensors cannot correctly
measure increasing air pressure inside the
doors when air escapes through larger, un-
closed 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 open-
ings 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.
— Always have work on the doors done by an
authorized Audi dealer or qualified work-
shop.


209

8S8012721BA
Checking and Filling


Audi recommends
Sbastrol | ZIDIGE Prarzssional
Audi recommends using the LongLife high-per-
formance engine oil from Audi Genuine Parts.
I Tet
Engine oil pressure


i Turn off engine! Oil pressure too low
Stop driving and switch the engine off. Check the
engine oil level > page 231.
— If the engine oil level is too low, add engine oil
=> page 232. Only continue driving once the in-
dicator light turns off.
— If the engine oil level is correct and the indica-
tor light still turns on, turn the engine off and
do not continue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance.
Engine oil level
Applies to: vehicles with oil level warning
3 Please check oil level
— You may continue driving for the time being.
Check the engine oil level as soon as possible
=> page 231, Checking the engine oil level.
—If the engine oil level is correct and the indica-
tor light still turns on, drive at low engine
speed to an authorized Audi dealer or author-
ized Audi Service Facility.
Engine oil sensor
Bs Oil level sensor: oil change necessary. Please
contact Service
Fuel has entered the engine oil. This will cause
the engine oil level to rise slowly and the engine
oil quality to decrease. Do not extract engine oil
to reduce the level, because this will increase the
risk of engine damage. Drive to an authorized Au-
di dealer or authorized Audi Service Facility im-
mediately to have engine oil extracted.
3 Oil level system: malfunction! Please con-
tact Service
The sensor that checks the engine oil level has
malfunctioned. Drive to an authorized Audi deal-
er or authorized Audi Service Facility immediately
to have the malfunction corrected.
& Oil pressure sensor: malfunction! Please
contact Service
The sensor that checks the engine oil pressure
has malfunctioned. Drive to an authorized Audi
dealer or authorized Audi Service Facility immedi-
ately to have the malfunction corrected.
Engine warm-up request*
i Please drive to warm up engine
Fuel has entered the engine oil, either due to low
outside temperatures or frequent short drives.
Drive until the engine is warm so that the fuel in
the engine oil will evaporate. Avoid high engine
speeds, full accelerating, and heavy engine loads
when doing this.
@ Tips
The oil pressure warning EZ is not an oil level
indicator. Always check the oil level regularly.
Checking the engine oil level
Q

BsVv-0588
&
Fig. 175 Oil dipstick (example): checking the engine oil lev-
el

Observe the safety precautions > A\ in General
information on page 228.
>» Park the vehicle on a level surface.
> Shut the engine off when it is warm.
> Wait approximately two minutes.
> Open the hood > page 229.
> Remove the oil dipstick > page 230, fig. 174,
wipe it off with a clean cloth and insert it all the
way in again.
> Remove the oil dipstick again and then read the
oil level > table on page 232.
231
>

8S8012721BA
Wheels

overheat and can lead to tire failure. Under-infla-
tion also reduces fuel efficiency and tire tread
life, and may affect the vehicle's handling and
stopping ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's re-
sponsibility to maintain correct tire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres-
sure telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the sys-
tem is not operating properly. The TPMS mal-
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi-
mately one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the mal-
function exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
If the Tire Pressure Monitoring System
indicator appears
Applies to: vehicles with Tire Pressure Monitoring System in-
dicator
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too low
or if there is a system malfunction.
Using the ABS sensors, the tire pressure monitor-
ing system compares the tire tread circumference
and vibration characteristics of the individual
tires. If the pressure changes in one or more
tires, this is indicated in the Infotainment system
display with an indicator light @ and a message.
If only one tire is affected, the location of that
tire will be indicated.
The tire pressures must be stored in the Infotain-
ment system again each time the pressures
change (switching between partial and full load
pressure) or after changing or replacing a tire on
your vehicle > page 258. The tire pressure moni-
toring system only monitors the tire pressure you
have stored. Refer to the tire pressure label for
the recommended tire pressure for your vehicle
=> page 250, fig. 184.
Tire tread circumference and vibration character-
istics can change and cause a tire pressure warn-
ing if:
— The tire pressure in one or more tires is too low
— The tire has structural damage
— The tire was replaced or the tire pressure was
changed and it was not stored > page 258
— The spare tire* is installed
Indicator lights
@® - Loss of pressure in at least one tire > A\.
Check the tires and replace or repair if necessary.
Check/correct the pressures of all four tires and
store the pressure again in the Infotainment sys-
tem > page 258.
ia (Tire Pressure Monitoring System) Tire pres-
sure: malfunction! See owner's manual - if io
appears after switching on the ignition or while
driving and then the @) indicator light in the in-
strument cluster also starts to blink for about
one minute and then stays on permanently, there
is a system malfunction. Try to store the correct
tire pressures > page 258. If the indicator light
does turn off or turns on again after a short peri-
od of time, drive to an authorized Audi dealer or
authorized Audi Service Facility immediately to
have the malfunction corrected.

ZA WARNING
— If the tire pressure indicator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu-
vers. Stop as soon as possible and check the
tires and their pressure.

257

8S8012721BA
Wheels

installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
Applies to: vehicles with tire pressure monitoring system
The tire pressure monitoring system monitors
the pressure in the four tires when driving.
The system uses sensors that measure the tem-
perature and pressure in the tires. The data is
sent from these sensors to the control module by
radio frequency.
The tire pressure monitoring system shows the
current pressures and temperatures of the tires
in the Infotainment system while driving
= page 259. It also compares the current tire
pressures with the stored tire pressures and gives
a warning if the tire pressure is different from
what is stored > page 260.
The system does not detect if the stored tire
pressures match the recommended tire pres-
sures. You must store the tire pressures again in
each of the following situations > page 260:
— Each time the tire pressures change, for exam-
ple when the load in the vehicle changes
— After replacing a tire
— If wheels with new wheel sensors are used

Z\ WARNING
— The tire pressure monitoring system assists
the driver in monitoring tire pressures. The
driver is responsible for having the tires in-
flated to the correct pressure.
— Do not change the tire pressure when the
temperature of the tire is extremely high.
This could result in serious damage to the
tire and even cause the tire to burst, increas-
ing the risk of an accident.
— A tire with low pressure flexes more. This
heats the tire up too much. This could cause

the tread to separate and even cause the tire
to burst, increasing the risk of an accident.
—The tire pressure monitoring system does
not warn about damage or defects in the
tire construction that could cause the tire to
burst, for example. Inspect your tires regu-
larly.
@ Tips
—If tires are replaced, the sensors and valves
do not need to be removed or replaced. Only
replace the valve stem and, if necessary, the
valve and the wheel electronics. If you have
questions, see an authorized Audi dealer or
authorized Audi Service Facility.
—An incorrect display or a malfunction in the
tire pressure monitoring system can occur
after using the tire mobility kit. Have the
sensors replaced by an authorized Audi
dealer or authorized Audi Service Facility.
— For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see
=> page 283.
Displaying tire pressures and temperatures
Applies to: vehicles with tire pressure monitoring system


Requirement: you must be driving the vehicle.

> Select in the Infotainment system: [MENU] but-
ton > Service & checks > Tire pressure monitor-
ing > Display tire pressure.

— Green: the current tire pressure and the speci-
fied tire pressure are approximately the same.
— Yellow: the current tire pressure is lower than
the specified tire pressure.
The specified tire pressure is the last tire pressure
that was stored > page 260.
Note that the tire pressure also depends on the
temperature of the tire. The tire pressure increas-
es as the engine becomes warmer while driving.

ZA\ WARNING
Read and follow the important information
and notes > page 259. >

259