lock AUDI Q3 2018 Workshop Manual

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and a special procedure. You must not repair or
disassemble them ¢.&. .
A WARNING
Wheel bolts that are tightened or repaired in­
correctly can become loose and result in loss
of vehicle control, which increases the risk of
an acc ident. For the correct tightening specifi ­
cation, see ¢
page 192, After changing a
wheel .
- Always keep the wheel bolts and the
threads in the wheel hub clean and free of grease.
- Only use wheel bo lts that fit the rim .
- Always have damaged r ims repa ired by an
authorized Audi dealer o r autho rized Aud i
Service Facility . Never repair or d isassemble
r ims yourself, because this inc reases the risk
of an accident.
Winter tires
W inte r ti res s ignificantly improve the vehicle's
h andling when driving in win ter condit ions . Be­
cause of the ir constr uction (width, compound,
tread pattern), summer tires provide less trac­
tion on ice and snow .
... Use w inter t ires on all fo ur wheels .
... Only use winter t ires that are approve d for your
v ehicl e.
... Please note that the maximum permitted
speed may be lower with winter tires¢.&.
in
General information on page 166.
An au thor­
ized Audi dealer or author ized Audi Service Fa­
c ili ty can inform you about the maximum per­
mit ted speed for you r tir es .
... Check the tire press ure after installing w heels
¢ page 176.
The effec tiveness of winter tires is reduced great­
l y when the t read is worn down to a depth of
0 .1 57 in ( 4 mm). The char acter istics of win ter
tires a lso dec rease great ly as t he tire ages, re­
gardless of the remaining tread .
@) For the sake of the environment
Reinstall s umme r ti res at the a ppro pria te
t ime, bec ause they provide bet ter hand ling
Wh eel s
when roa ds a re free o f snow and ice . Summer
tires cause less road noise, tire wear and fue l
consumpt ion .
(D Tips
You can also use a ll season tires instead of
winter tires . Please note that in some coun ­
tries where winter tires are required , on ly
winter tires w it h the
& symbo l may be per­
mitted.
Snow chains
S now cha ins not only improve the drivi ng in win ­
te r road condit ions, but also the braking .
... On ly ins tall snow chains on the front wheels.
T his applies a lso to vehicles with a ll wheel
drive*.
... Check and correct the seating of the snow
chai ns after d riving a few feet, if necessary. Fol­
low the instr uctions from the manufac turer.
... Note the maximum permitted spee d when dr iv­
ing with snow chains . Do not exceed 30 mph
(SO km/h).
U se fine-me sh snow chains . They must no t add
more than 0.53 inch (13. S mm) in height, incl ud­
ing t he chain lock .
You m ust remove the snow chains on roads with­
o ut snow . O therwise, you co uld impair d riving
abili ty and damage the t ires .
Use of snow c hains is only permitted with certa in
r im/tire comb inat io ns due to technical reasons .
C heck wi th an au thorized Audi dea ler or author­
ized Audi Service Facility to see if you may use
snow chains .
A WARNING
Using incor rect snow chains or installing snow
cha ins incor rect ly can resu lt in loss of veh icle
control, which increases the risk of an acci·
dent.
(D Note
Snow cha ins can damage the rims/whee l cov-
ers * if the chains come into direct contact
liJJ,
181

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Care and cleaning
Component Situation Solution
Paint
Paint damage Refer to the paint number on the vehicle data label, repair
w ith touch up pa int
c;,poge 209
Spilled fuel Rinse with wate r immediately
Surface rust Rust remover, then protect with hard wax; for questions,
consult an authorized Audi dealer or authorized Aud i Serv-
ice Facility.
Corrosion Have
it removed by an authorized Audi dea ler or author-
ized Audi Service Facility.
Water no longer Protect with hard wax (at least twice per year)
beads on the surface
of clean paint
No shine even though Treat with su itable polish; then apply paint protectant if
paint has been pro- the polish that was used does not contain any protectant
tected/paint looks poor
Deposits such as in -Dampen with water immediately and remove w ith a micro-
sects, bird droppings, fiber clloth
tree sap and road salt
Grease-based con- Remove
immediat ely with a mild soap so lution
al and a
taminants such as soft cloth
cosmetics or sunblock
Carbon parts Depos its clean the same way as painted parts ¢page 185
a) Mi ld soap solution: maximum two tab lespoons of neu tral soap in 1 quart (1 lite r) of water
Interior cleaning
Component Situation Solution
Windows
Deposits Glass cleaner, then wipe dry
Decorative parts/ Deposits Mild soap solutiona>
Trim
Plastic parts
Deposits Damp cloth
He avier deposits Mild soap solution a), detergent-free plastic clean ing solu-
tion, if necessa ry
Oisplays/instru -Deposits Soft
cloth with LCD cleaner
ment cluster
Controls
Deposits Soft brush, then a soft
cloth with a mild soap solutiona>
Safety belts Deposits Mild
soap solution al, allow to dry before letting them re-
tract
187

Emergency assistance
& WARNING
You or your passengers could be injured while changing a wheel if you do not follow these
safety precautions :
- If you have a flat ti re, move a safe d ista nee
off the road . Turn off the engine, turn the
emergency flashers on and use other warn·
ing devices to alert other motorists.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipping off the jack,
always fully set the parking brake and block
the front and back of the wheel diagonally
opposite the wheel being changed with the
folding chocks or other objects. When one
front wheel is lifted off the ground, placing
the Automatic Transmission in "P" (Park)
will
not prevent the vehicle from moving.
- Before you change a wheel, be sure the
ground is level and firm. If necessary, use a
sturdy board under the jack .
- Always store the vehicle tool kit, the jack
and the replaced tire in the luggage com­
partment
c:> page 102 .
(D Tips
Obey all laws.
Changing a wheel
When you change a wheel, follow the sequence
described below step-by-step and in exactly that
order.
1. Remove the decorative wheel cover* or the
wheel bolt caps*. For more details see also
<=:>page 193.
2. Loosen the wheel bolts c:> page 193.
3. Locate the proper mounting point for the
jack and align the jack below that point
<=:>page 194.
4. Lift the car with the jack c:> page 194 .
5. Remove the wheel with the flat tire and then
install the
spare tire <=:>page 195.
6. Tighten all wheel bolts lightly.
7.
Lower the vehicle with the jack.
192
8. Use the wheel bolt wrench and firmly tighten
all wheel bolts in a crisscross pattern
<=:>page 193.
9. Replace the decorative wheel cover* or the
wheel bolt caps*.
& WARNING
Always read and follow all WARNINGS and in­
formation
c:> .&. in Raising the vehicle on
page 194
and <=:>page 196.
After changing a wheel
A wheel change is not complete without the do·
ing the following .
.,. Always store the vehicle tool kit, the jack* and
the replaced tire in the luggage compartment
c:>page 102.
.,. Check the tire pressure of the spare tire as soon
as possible .
.,. As soon as possible, have the
tightening tor·
ques
on all wheel bolts checked with a torque
wrench. The correct tightening torque is
10S ft lbs (140 Nm).
.,. Have the flat tire
replaced as soon as possible.
(D Tips
- If you notice that the wheel bolts are cor­
roded and difficult to turn while changing a
tire, they should be replaced before you check the tightening torque.
- Drive at reduced speed until you have the
tightening torques checked .

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Removing the wheel covers/bolt caps
Fig. 149 Changin g a whee l: remo ving the wheel cover
Fig. 150 Ch an gin g a w hee l: remov ing t he wheel bolt caps
Wheel cover*
.. Insert the hook provided with the vehicle tool
kit in the hole in the hub¢
fig. 149.
.. Pull off the decorative wheel cover .
Wheel bolt caps*
.. Push the plastic clip provided with the vehicle
tool kit over the wheel bolt cap until it engages
¢fig . 150.
.. Pull on the plastic clip to remove the cap.
Loosening and tightening the wheel bolts
The wheel bolts must be loosened before raising
the vehicle.
Fig. 151 Ch ang ing a whee l: loose ning the w heel bolts
Emergency assistance
Loosening
.. Inst all the wheel bolt wrench over the wheel
bolt and push it down as far as it wi ll go .
.. Take tight hold of the
end of the wrench hand le
and turn the wheel bolts
counter-clockwise
about one single turn in the direction of arrow
¢fig. 151.
Tightening
.. Insta ll the wheel bolt wrench over the wheel
bolt and push it down as far as it w ill go.
.. Take tight hold of the
end of the wrench hand le
and turn each wheel bolt
clockwise until it is
seated.
A WARNING
-- Do not use force or hurry when changing a
wheel -you can cause the vehicle to slip off
the jack and cause serious personal injuries .
-Do not loosen the wheel bolts more than
on e turn
befo re you raise the vehicle with
the jack. -You risk an injury.
(0 Tips
-Never use the hexagonal socket in the han­
dle of the screwdr iver to loosen or tighten
the whee l bolts.
- If a wheel bolt is very tight, you may find it
easier to loosen by ca refully pushing down
on the end of the whee l bolt wrench with
one foot only. As you do so, hold on to the
car to keep yo ur balance and take care not
to slip.
193

-Make sure jack posit ion is correct , adjust
as necessary and then cont inue to raise
the jack.
- If work has to be done under the vehicle,
ensure that it is safely supported on su ita­
ble stands -risk of injury!
- Never start the engine when the vehicle is
on the jack -risk of accident!
CD Note
Do not lift the vehicle by the sill. Position the
vehicle jack on ly at the designated lifting
points on the sill. Otherwise, your vehicle will
be damaged.
Taking the wheel off/installing the spare
tire
F ollow these instructions step-by-step for chang­
ing the wheel .
Fig. 154 C hangin g a w heel: using th e hexagonal s oc ket
(w it h the blade removed ) to turn t he bolt s
Fig. 155 Chan gin g a w hee l: a lig nm ent pin in side the to p
h ol e
After you have loosened all wheel bolts and
~ raised the vehicle off the ground, remove and re-....
~ place the whee l as follows:
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Em ergen cy a ssis tanc e
Removing the whe el
.,. Remove the topmost wheel bolt completely
with the
he xagona l s oc ket in the screwdriver
handle (vehicle too l kit) ¢
fig. 154 and set it
aside on a
clean surface.
.,. Screw the threaded end of the
alignment pin
from the tool kit hand-tight into the empty bolt
hole ¢
fig. 155 .
.,. Then remove the other wheel bolts as described
above .
.,. Take off the whee l leaving the alignment p in in
the bolt hole
r=.> G) .
Putting on the spare tire
.,. Push the spare tire over the alignment pi n
¢(D .
.,. Screw on the whee l bolts and tighten them
slightly u sing the hexagona l socket .
.,. Remove the alignment pin and insert and t ight­
en the remaining wheel bo lt s lightly like the
rest .
.,. Turn the jack hand le count er-clockw ise to lower
the vehicle unti l the jack is fully released .
.,. Use the wheel bo lt wrench to tighten all wheel
bolts firmly . Tighten them
in a crisscross pa t­
tern,
from one bolt to the (approx imately) op ­
posite one, to keep the wheel centered .
.,. Perform the steps required after chang ing the
wheel ¢
page 192, A~er changing a wheel.
_& WARNING
Do not use the hexagon al soc ket in the screw­
driver handle to tighten the wheel bo lts. It is
not possible to tighten the bolts to the re­
qu ired torque using the hexagonal socket -
risk of acc ident!
CD Note
When removing or installing the wheel, the
rim could h it the brake rotor and damage t he
rotor. Work carefully and have a second per­
son to he lp you.
@ Tips
- When mounting tires with un idirectional
tread de sign
make sure the tread pattern is
pointed the right way
r=.> page 196. 1JJ,,
195

Fuses and bulbs
(D Tips
-The following table does not list fuse loca­
tions that are not used.
- Some of the equipment listed in the follow­
ing tables applies only to certain model ver­
sions or certain optional equipment.
Fuse assignment, cockpit
The fuse number is stamped into the plastic be­
low or above each fuse.
No. Equipment
1 LED headlight (left)
2 LED headlight (
right)
5 LED headlight (left)
6 LED headlight (right)
7 Steering lock
8 Convenience access contro
l module
9 Airbag control module, AIRBAG OFF
indi-
cator light
12
Transmission control module, selector
mechanism
Air quality sensor for cl imate control sys-
tern, heated w indow washer nozzles,~
button, reverse light,(®) button, oil level
13 sensor, climate contro
l system, seat occu-
pant detection system, seat heating, but-
tons in the center console, automatic dim-
ming mirror
Engine control module , quattro control
modu le, transmission control module,
14 brake lights, electromechanica
l steering,
Gateway control module, trai ler hitch con-
trol module, ESC control module, light
switch, damping control module
Headlight range control module, instru-
ment illumination, headlights (left, right),
15 diagnostic connector, crankcase housing
heater, a
ir flow sensor, socket relay, DC/
DC converter
16 Parking aid
17 Parking system rearview camera
18 TV tuner
19 Engine starter control, DC/DC converter
200
No
. Equipment
20 E
SC contro l module, climate/heating con-
trol, special functions interface
21 Selector mechanism power supply
22 Interior monitoring
(®) button, front interior lighting buttons,
23 diagnostic connector, light
switch, light/
rain sensor, humidity sensor, emergency
call system
25 Headlight power supply
26 Rear window wiper
27 Starter system
28 Infotainment system
29 Supply for
the park ing system rearview
camera and TV tuner
30 Infotainment system
31 Infotainment system
32 Instrument cluster
33 Automatic dimming rearview mirror
36 Cigarette lighter, cockpit/luggage com
-
partment socket
37 Cockpit/rear socket 38 Transmission contro l module
40 Trailer hitch control module 41 Trailer hitch control module
42 Trai ler hitch control module
44 Rear window defogge r
4S Electromechanical parking brake control
module
46 Trailer hitch control module
47 quattro control module
48 Automatic luggage compartment lid con-
tro
l modu le
so Blowe r
51 Electromechanical parking brake control
module
52 BCM
53 Front seat heating
54 Panorama gla ss roof
55 Sunshade on the panorama glass roof
56 Contro l modu le for suspension control

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Engine compartment fuse assignment
The fuse number is stamped into the plastic be­
low or above each fuse.
No. Equipment
1 Transmiss ion supply
2 ESC
3 Horn
4 DC/DC
converter
5 BCM, battery data module
6 BCM (right)
7 Washer fluid pump
8 BCM (left)
9 Seat adjustment lumbar support
10 Glow time
control module, fuel pump,
heated oxygen sensor
11 Steering
column lever, multifunction
steer ing whee l controls
1 2 Cell phone adapter
13 En
gine control module
14 Engine control module
15 Gateway
16 Heated oxygen sensor, fuel pump, eng
ine
components
17 Engine components
18 Fue
l pump control module
19 Sound amplifier, DC/DC converter
20 Clutch pedal sensor, brake light sensor
22 Windshield wipers Radiator fan, engine components, coolant
23 recirculation pump, auxiliary
heater, fuel
pump relay coils
24 Ignition coils
25 Driver's door
control module (central lock-
ing, window regulators)
26 Front passenger's door control module
(centra
l locking, window regulators)
27 Term inal 15 supply
29 Power seat adjustment (driver,
front pas-
senger)
30 ESC
Fu ses an d bulb s
Bulbs
Replacing light bulbs
For your safety, we recommend that you have
your authorized Audi dealer replace any bulbs for
you .
It is becoming increasingly more and more diffi­
cult to replace vehicle light bulbs since in many
cases, other parts of the car must first be re­
moved before you are able to get to the bulb .
T his applies especially to the light bulbs in the
front of your car which you can only reach
through the engine compartment .
Sheet metal and bu lb holders can have sharp
edges that can cause serious cuts, pa rts must be
correctly taken apart and then properly put back
together to help prevent breakage o f parts and
long term damage from water that can enter
housings that have not been properly resealed.
For your safety, we recommend that you have
your authorized Aud i dea ler rep lace any bulbs fo r
you, since your dealer has the proper tools, the
correct bulbs and the expertise.
Gas di schar ge la mps (Xe no n ligh ts):
Due to the high electr ical voltage, have the bulbs
rep laced by a qualified technician. Headlights
with Xenon light are identified by the hig h volt­
age st icker.
LED headlights* require no maintenance . Please
contact your authorized Audi dea ler if a bulb
needs to be replaced.
_&. WARNING
Changing Xenon lamps wi thout the necessary
equipment can cause serious personal injury .
- Bulbs are pressu rized and can explode when
be ing changed. Potent ial ris k of injury!
- On veh icles equipped with gas disc harge
bu lbs (Xenon light) life-threatening injuries
can resu lt from improper handling of the
high-vo ltage portions of such lamps!
- Only your authorized A udi dealer or quali­
f ied workshop sho uld change the bulbs in
gas discharge lamps. There are parts with
sharp edges on the openings and on the
201

-Do not bend over the batteries -danger of
chemical burns!
- The battery cell locking screws must be
tightened securely.
- Before you check anything in the engine
compartment, a lways read and heed all
WARNINGS
¢ page 155.
(D Note
Improper hook-up of jumper cables can ruin
the generator.
- Always connect POSITIVE(+) to POSITIVE
( + ), and NEGATIVE(-) to NEGATIVE(-)
ground post of the battery manager contro l
unit.
- Check that all screw p lugs on the battery
cells are screwed in firmly . If not, tighten
plugs prior to connecting clamp on negative
battery terminal.
- Please note that the procedure for connect­
ing a jumper cable as described above ap­
plies specif ically to the case of your vehicle
being jump started. When you are giv ing a
jump start to another vehicle, do
not con­
nect the negative( -) cab le to the negative
(-) terminal on the discharged battery@
¢ fig. 161. Instead, securely connect the
negative (-) cable to either a solid metal
component that is firm ly bolted to the en­
gine block or to the engine block itself. If
the battery that is being charged does not
vent to the outs ide, escaping battery gas
could ignite and explode!
Towing with a tow truck
General hints
Your Audi requires special handling for towing .
The following information is to be used by com ­
mercial tow tr uck operators who know how to op­
erate their equipment safely .
-Never tow your Audi, towing will cause dam-
age to the engine and transmission .
a '.:: -Never wrap the safety chains or winch cables
~ around the brake lines. N
"" 0 0 ::, (X)
Emergency situations
-To prevent unnecessary damage , your Audi
must be transported with a flat bed truck.
- To load the vehicle on to the flat bed, use the
towing loop found in the vehicle tools and at·
tach to the front or rear anchorage
¢ page 205 and ¢ page 206.
A WARNING ~ -
A veh icle being towed is not safe for passen­
gers . Never allow anyone to ride in a vehicle
being towed, for any reason.
Front towing loop
Only install the front towing loop when it is
needed.
®
®
0 0:, N 9 ::> 0:, a)
Fig. 162 Front bumpe r on t he r ight s ide: remove t he cover
Fig. 163 Front bumpe r on t he right side: screw in the tow-
in g loop ...
205

Emergency situations
distribut ion and ba lance . This might hap ­
pen, for example, when heavy compo­
nents such as the engine block or trans­
miss io n are removed.
- When removing heavy components like
th ese, a nch or vehicle to ho ist o r add corre­
sponding weights to maintain the cen ter of
gr avity. Otherwise , th e vehicle migh t ti lt or
s lip off the hoist, causing s erious p erso nal
rnJury.
0 Note
- Be aware of t he following poi nts before lift­
i ng t he veh icle:
-The vehicle should never be lifted or
jacked up from underneath the engine oil
pan , the transmission housing, the front
or rear axle or the body side members.
This could lead to serious damage.
- To avoid damage to the underbody or
chassis frame, a rubber pad must be in·
serted between the floor jack and the lift points.
- Before driving over a workshop hoist,
check that the vehicle weight does not
exceed the permissible lifting capacity of
the hoist .
- Before driving over a workshop hoist, en­
sure that there is sufficient clearance be­
tween the hoist and low parts of the ve ·
hide .
208

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today's automobiles, have steadily reduced the
scope of maintenance and repairs which can be
carried out by vehicle owners.
Also, safety and
environmental
concerns place very strict limits
on the nature of repairs and adjustments to en­
gine and transmission parts which an owner can perform .
Maintenance, adjustments and repairs usually re­
quire special tools, testing devices and other
equipment available to specially trained work ­
shop personnel in order to assure proper per­
formance, reliability and safety of the vehicle and
its many systems.
Improper maintenance, adjustments and repairs
can impair the operation and reliability of your
vehicle and even void your vehicle warranty .
Therefore, proof of servicing in accordance with
the maintenance schedule may be a condition for upholding a possible warranty claim made within
the warranty period.
Above all , operational safety can be adversely af­
fected, creating unnecessary risks for you and
your passengers.
If in doubt about any servicing, have it done by
your authorized Audi dealer or any other properly equipped and qualified workshop. We strongly urge you to give your authorized Audi dealer the
opportunity to perform all scheduled mainte­ nance and necessary repairs. Your dealer has the
facilities, original parts and trained specialists to keep your vehicle running properly .
Performing limited maintenance yourself
The following pages describe a limited number of
procedures which can be performed on your vehi­
cle with ordinary tools, should the need arise and
trained personnel be unavailable. Before per­
forming any of these procedures, always thor­
oughly read all of the applicable text and careful­ ly follow the instructions given . Always rigorously
observe the
WARNINGS provided .
Before you check anything in the engine com­
partment, always read and heed all WARNINGS
c::> .&. and c::> .&. in Working in the engine compart­
ment on page 155. Consumer Information
A WARNING
-
Serious personal injury may occur as a result
of improperly performed maintenance, ad­
justments or repairs .
- Always be extremely careful when working
on the vehicle. Always follow commonly ac­
cepted safety practices and general com­
mon sense. Never risk personal injury.
- Do not attempt any of the maintenance,
checks or repairs described on the following
pages if you are not fully familiar with these
or other procedures with respect to the ve­
hicle, or are uncertain how to proceed.
- Do not do any work without the proper tools
and equipment. Have the necessary work
done by your authorized Audi dealer or an­
other properly equipped and qualified work­
shop.
- The engine compartment of any motor vehi­ cle is a potentially hazardous area. Never
reach into the area around or touch the radi­
ator fan.
It is temperature controlled and
can switch on suddenly - even when the en­
gine is off and the ignition key has been re­
moved. The radiator fan switches on auto­
matically when the coolant reaches a certain
temperature and will continue to run until
the coolant temperature drops.
- Always remove the ignition key before any­
one gets under the vehicle.
- Always support your vehicle with safety
stands if it is necessary to work underneath
the vehicle . The jack* supplied with the vehi­
cle is not adequate for this purpose and
could collapse causing serious personal in­
jury.
- If you must work underneath the vehicle
with the wheels on the ground, always make
sure the vehicle is on level ground, that the
wheels are always securely blocked and that the engine cannot be started.
- Always make sure the transmission selector
lever (automatic transmission) is in P (Park
position) and the park brake is applied.
213