2014 AUDI Q7 check engine light

26 6 Ch eck ing and filling
Coolant lo ss
Coolant loss may indicate a l ea k in t he cooling
system. In the event of coolant loss, the cool ­
ing system should be inspected immediately
by your authorized Audi dealer. It is not
enough merely to add coolant.
I n a
se ale d system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
A WARNING
The cooling system is under pressure and
can get very hot. Reduce the risk of scald­
ing from hot coolant by following these
steps .
- Turn off the engine and allow it to cool
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag .
- Turn the cap slowly and very carefully in
a counter -clockwise direction wh ile ap ­
plying light, downward pressure on the
top of the cap .
- To avoid being burned, do not spill ant i­
freeze or coolant on the exhaust system
or hot eng ine parts. Under certain condi­
t ions, the ethy lene g lycol in engine cool­
an t can ca tch f ire.
0 Note
Do not add any type of radiator leak seal­
ant to your vehicle's eng ine coolant. Add­
ing radiato r repair fluid may adve rsely af­
fect the function and performance of your
cooling system and could res ult in damage
not covered by your New Vehicle Limited
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anything i n the engine com­
pa rtmen t,
a lwa ys rea d and h eed all WARN ­
INGS c:::> A in Working in the engine compart ­
ment on page 257.
.. Tu rn off the engine .
.. Let the engine cool down.
.. Place a thick rag over the coo lant expansion
tank
c> page 265 , fig. 245 and car efully
twist the cap counter-clockwise c> ,&. .
.. Add coo lant m ixed in the correct rat io
c:::> page 264, Coolant.
.. Twist the cap on again tightly.
Replacement engine coolant must conform to
exact spec ificat ions
c> page 264, Coolant.
We recommend using only coo lant additive
G12 ++, G13 or in an emergency G12 +. Do
not
use a different add itive. In an emergency use
plain water until you can get the correct addi­
t ive and can restore the correct ratio . This
shou ld be done as soon as poss ib le.
If you have lost a considerable amount of
coolant, then you should add cold ant ifreeze
and co ld water only when the eng ine is cold .
Always use
new engine coolant when refilling.
Do not fi ll coolant above the "MAX" mark. Ex­
cess coolant will be forc ed out through the
pressure relief valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of
scalding from hot coolant by following
these steps.
- Turn off the engine and allow it to coo l
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering
the cap with a large, th ick rag.
- Turn the cap s low ly and very carefully
in a counter-clockwise direction while
applying light, downward pressure on
the top of the cap.
- To avoid being burned, do not spill an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certain
cond it ions, the ethylene g lycol in en ­
gine coolant can catch fire .

-Antifreeze is poisonous . Always store an­
t ifreeze in its or iginal container and well
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clearly marked "poison".
(D Note
- Coolant pollutes the environment and
could cause an engine fire. Excess coo l­
ant will be forced out through the pres­
sure re lief va lve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the correct ratio between water
and antifreeze ¢
page 264 must be re­
stored as soon as possib le.
@ For the sake of the environment
Drained coolant should not be reused. Al­
ways dispose of used coolant while observ­ ing all environmental regulations .
Radiator fan
The radiator fan switches on automatically by
itself
The radiator fan is driven by the engine via the
V-belt . The viscous clutch regulates the speed
of the fan accord ing to the temperature of the
coolant .
An auxiliary electric radiator fan* switches on
and off depending on coolant temperature
and other vehicle operating conditions .
After you switch the engine off, the auxilia ry
fan can continue running for up to 10 minutes
- even with the ignition off. It can even switch
on again later by itself¢& , if
- the temperature of the engine coolant rises due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment hea ts up because
the vehicle is parked in intense sunlight .
Checking and fillin g 267
A WARNING
-To reduce the risk of personal injury nev­
er touch the rad iator fan.
- The auxiliary electric fan is temperature
controlled and can switch on suddenly
even when the engine is not running .
- The auxiliary radiator fan switches on au­
tomatically when the engine coolant reaches a certain temperature and will
continue to run until the coo lant temper­
ature drops.
Brake fluid
Checking brake fluid level
The brak e fluid lev el can be check ed with a
quick glance.
N
N
-N ,.
:8
Fi g. 246 En gin e compa rtm en t: cover o n the bra ke fluid
reservoir
Before you check anything in the eng ine com­
partment ,
always read and heed all WARN­
INGS ¢ A in Working in the engine compart­
ment on page 257.
.,. Read the brake fluid level from the brake
fluid reservoir ¢
fig. 246, ¢ page 259,
fig. 241.
The brake fluid level must be be­
tween the "MIN" and "MAX" markings .
The brake fluid reservoir is located at the rear
partition of the eng ine compartment on the
left side ¢
page 259.
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads. This is not cause for alarm. ..,_

Disconne cting the batt ery t erminals
Some vehicle functions (power w indow regu ­
l ators, for example) are lost if the battery ter­
minals are disconnected . These functions have
to be re learned after the battery terminals are
connected again. To prevent this, the battery
should only be disconnected from the vehicle
electrical system when absolutely necessary
for repairs .
Vehicle s not driven fo r lo ng period s
If you do not drive your vehicle over a period
of several days or weeks, electrical compo­
nents are gradually cut back or switched off .
This reduces energy consumption and main­
tains starting capab ility over a longer per iod
¢ page 229 .
Take into consideration that when you unlock
your vehicle, some convenience functions,
such as the inter ior lights or the power seat
adjustment, may not be available . The con­
ve nience funct ions w ill be available again
when yo u turn on the ignition and start the
engine.
Winter op eration
During the winter months, battery capacity
tends to decrease as tempe ratures d rop . This
i s because more powe r is also consumed while
start ing, and the headl ights, rea r window de ­
fogger, etc., are used more often.
Avo id unnecessary power consumption, par­
ticularly in c ity t raffic or when t rave ling on ly
short d istances. Let you r autho rized Aud i
dealer check the capacity of the vehicle bat­
tery before winter sets in ¢
page 270. A we ll
charged battery wi ll not only prevent starting
prob lems when the weather is cold, but will
also last longer .
If your vehicle is left standing for severa l
weeks at extremely low temperat ures, the
veh icle battery should be removed and
stored where it will not freeze. This will
prevent it from bei ng damaged and hav ing
to be replaced.
Checkin g and fillin g 269
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located under the driver 's seat.
Before you check anyth ing under the dr iver's
seat,
read and h eed all WARNINGS G &_ .
Always heed the safety warnings , when work­
ing on the vehicle battery or the vehicle e lec­
trical system to prevent injury .
The following WARNINGS are ver y
important when working on the batter y:
Alway s heed the following WARN IN G SY M-
BOLS a nd safety p re caution s when working
on the battery .
®
Alway s wear e ye prote ction.
&
Bat te ry acid contains s ulfuric acid. Al-
ways w ear glov es and ey e prot ect ion .
@
No
-spar ks
- flames
- smo kin g.
A
When a batt ery i s charged , it produ ce s
hydro gen g as whi ch i s explo sive and
c o uld cau se pe rsonal injur y.
®
Alw ays k eep th e batt ery w ell out of
reac h of chi ldr en .
.8, WARNING
Whenever working on the battery or on
the electrical system, there is the risk of
injury, accident and even fire . Read and
heed the following WARNINGS:
- Always wear eye protection. Do not let
battery ac id or any lead particles get on
your skin or clothing . Shield you r eyes .
Exp losive gases can cause blindness or
other injury.
- Battery acid contains sulfuric acid. Sulfu­
ric acid can cause blindness and severe
burns.
- Always wear g loves and eye protection.
-
Do no t tilt the ba ttery because acid .,. •
•

2 70 Checking and filling
could leak out of the ventilation
openings.
- If you get battery acid in your eyes or
on your skin, immediately rinse with
cold water for several minutes and get
medical attention.
- If you should ingest any battery acid,
seek medical attention immediately.
- Do not expose the battery to an open
flame, electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and neg-
ative cables.
- When working on the battery , be sure
not to short-circuit the terminals with
tools or other metal objects. This would
cause the battery to heat up very quickly,
which could lead to damage or explosion
and personal injury.
- When a battery is charged, it produces
hydrogen gas which is explosive and
could cause personal injury .
- Always keep the battery well out of the
reach of children .
- Before work is done on the electrical sys­
tem, disconnect the negative ground ca­
ble .
- Before performing any work on the elec­
trical system, switch off the engine and
ignition as well as any electrical equip­
ment. The negative cable on the battery
must be disconnected. If you are just go­
ing to replace a light bulb, then it is
enough to switch off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you will set off the alarm.
- When disconnecting the battery, first
disconnect the negative cable and then
the positive cable .
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable. Never inter­
change the cables -this could start a fire!
- Never charge a frozen or a thawed-out
battery. It could explode! If a battery has
frozen, then it must be replaced. A dis- charged battery can freeze over at 32
°F
(0 oc).
-Make sure the vent hose is always attach­
ed to the opening on the side of the bat­
tery .
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways replace a damaged battery.
A WARNING
-
California Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems. Wash hands after han­
dling.
(D Note
- Do not disconnect the vehicle battery
when the ignition is switched on or when
the engine is running, otherwise, you will
damage electronic components in the
electrical system.
- If your vehicle is going to stand for a
long period of ti me without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then
have to be replaced.
Battery charging
Starting the engine requires a well charged
battery.
Fig. 247 E ngin e compart men t: Co nnectors fo r charger
and j umper cab les
Ill>

272 Ch eck ing and filling
Battery replacement
The new battery must have the same specifi­
cations and dimensions as the original equip­
ment battery.
Intelligen t energy management in your veh i­
cle is respons ible for d istributing the e lectr i­
cal en ergy throughout your vehicle
¢
page 229. T he intell igent e nergy manage­
ment system w ill keep the eng ine battery
cha rged better then vehicles w ithout this sys­
tem . To make sure the additional e lectrica l en ­
ergy is availab le once again after you have
changed the battery, we recommend that you install batteries of the same type and manu­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the battery hous ing . Your
author ized dealer must code the battery in
the ene rgy management system to enable you
to use the energy management f unct ions co r­
rectly after replac ing the battery.
If it is not poss ible to use a battery of this
type, the new battery must have the same ca­
pac ity, voltage (12 volts), amperage , con­
struction and plug seal ing.
When insta lling the battery, make sure the ig­
n it ion and all e lectr ica l consumers a re turned
off.
Q;) Note
Make sure the venti lation hose on the s ide
of the battery is connected, otherwise
fumes or battery ac id can leak o ut.
@ For the sake of the environment
Because of the problem of proper d isposa l
of a battery, we recommend your autho r­
i z ed Audi dealer change the ba tte ry for
you. Bat teries con tain s ulfu ric ac id and
lead and m ust always be disposed of prop ­
erly in compliance with all environmental
reg ulations. Disposing of vehicle batteries
improper ly is very dangerous to the envi­
ronment.
Windshield/headlight
washer container
F ig . 24 8 Eng in e compar tment : cover on t he wi nds hield
and headl ig ht* washe r flu id reservoi r
The washer fluid co nta iner is marked w ith the
symbol Won its cap ¢
fig. 248, ¢ page 259,
fig. 241 .
.. Before you check anything in the engine
compartment,
alwa ys read and he ed all
W ARNING S
¢ & in Working in the engine
compartment on page 257 .
.. Lift the fille r cap tongue to add washer flu­
id. You can fi ll the container to the top.
.. Press the cap back onto the fi ller neck afte r
fi lling the container.
You can find the reservo ir
capacity in the table
in
¢ page 315.
Clean water should be used when filling up . If
poss ible, use soft water to prevent scaling on
the washer jets. A lways add a glass clea ne r
so lution (with frost prote ction in the winter).
0 Note
Do not mix engine coolant antifreeze o r
any other additives to fill up the wind­
s hi eld washer rese rvoir.

Emergency situations
General
This chapter is intended for trained emer­
gency crews and working personnel who have the necessary tools and equipment to
perform these operations.
Starting by pushing or
towing
(D Note
Your v ehicl e is e quipped w ith an automatic
tra nsm iss io n. Cons eque ntly, the e ngine
cann ot be started by pus hing o r tow ing.
Starting with jumper
cables
If necessary, the engine can be started by
connecting it to the battery of another vehi­
cle.
If th e engine shou ld fail to start because of a
d ischarged o r weak battery, the battery can be
connected to the battery of
another veh icle,
usi ng a
pair of jumper cables to start the en­
gine .
Jumper c ables
Use only jumper cab les of sufficiently large
cross section to carry the starter cur rent safe­
l y. Refer to the man ufacturer's specifications.
Use only jumper cables with
insulated te rm i­
na l clamps w hich are d istinctly mar ked:
plus(+ ) cable in mos t ca ses co lore d red
minus(-) cable
i n most cases colored black .
A WARNING
Batteries con tai n elec trici ty, a cid, and gas.
Any o f these c an caus e ve ry ser ious or f atal
injury . Follow the instruc tions below fo r
safe han dling of your veh icle's battery .
- Alw ays s hield y our eyes and a void le an­
ing over the batte ry w henever possib le .
Emergency situations 307
- A discharged battery can freeze at tem­
pe rat ures just below 32 °F (0 °C). Before
connecting a jumpe r cable, you must
thaw the frozen battery c omp lete ly, ot h­
e rwise it could explode.
- Do not allow battery acid to co ntact eyes
or skin . Fl ush any con tacted area wi th
wat er immediately .
- Imp roper use of a booster battery to
s tart a vehicle may cause an ex plosion.
- Vehicle batter ies generate expl osive gas­
es. Keep sparks, flame and lighted c iga­
rettes away from ba tte ries.
- Do not t ry to jump start a ny ve hicle w it h
a low ac id leve l in the battery.
- The voltage of the booste r battery m ust
also have a 12-Vo lt rat ing. T he capac ity
(Ah) of the booste r batt ery sho uld not b e
lowe r than that of th e discharged bat­
t ery. Use o f batt eries of d iffe ren t vol tage
or su bstan tia lly differen t "Ah" rat ing
may cause an exp losion and pers onal in­
jury .
- N ever ch arge a fr ozen batt ery. Gas t ra p­
pe d in the ice may c ause an ex plosion .
- N ev e r ch arge o r use a batt ery th at h as
been fro zen . Th e batte ry case may have
be weake ned.
- U se o f batter ies of di ffere nt vol tage or
substantially differen t ca pa city (Ah) rat ­
i ng may cause an exp losion and injury .
T he ca pa c ity (Ah) of the booster battery
should not be lower than that of the dis­
charged battery.
- Before you check anything in the engine
compa rtment, always read an d heed a ll
WARNINGS
c::;,page 257.
(D Note
-App lyi ng a hi gher vo ltage booste r ba t­
t ery wi ll cause expens ive damage to sen ­
sit ive e lectronic components, such as
cont ro l units, relays, rad io , etc.
- There must be no electrical c ontact be ­
tween the vehicles as otherw ise current
co uld already start to f low as soon as t he
posi tive(+) terminals a re con nect ed. ..,. •
•

322 Index
Alcantara Cleaning 247
All-wheel drive . ........... .... .... . 228
Winter tires
Alternator 288
Malfunction . . . . . . . . . . . . . . . . . . . . . . . 31
Ambience lighting Lighting profiles .......... .... .... .. 62
Anti-freeze
refer to Engine coolant system ....... 264
Anti-lock brake system ...... .. .. .. .. . 224
Warning/indicator lights . . . . . . . . . 16, 18
Anti-slip regulation ........ .. .. .... . 224
Warning/indicator lights ... .. .. .. .. .. 16
Anti-theft systems Anti-theft alarm system . . . . . . . . . . . . . SO
Electronic immobilizer ............. .. 40
Approach/departure angle . .. .. .. .. .. . 237
Ashtray . .. ... ............ .. .. .. .. .. 87
Asterisk What does it mean when something is
marked with an asterisk? . . . . . . . . . . . . . . 6
Audi braking guard ....... .. .. .. .. .. . 127
Error messages .............. .... . 128
Settings . . . . . . . . . . . . . . . . . . . . . . . . . 128
Status messages . . . . . . . . . . . . . . . . . . 128
Switching on and off ...... .. .. .. .. . 128
Audi Service Repair Manuals and Litera-
ture .. .. .. .. ............. .. .. .... . 316
Auto -Check Control . . . . . . . . . . . . . . . . . . 30
Automatic belt retractor ..... .... ... . 178
Automatic mode
Four-zone automatic comfort air condi-
tioning ........................... 99
Automatic Shift Lock (ASL) . . . . . . . . . . . 138
Automatic transmission ..... .. .. .... . 137
Automatic Shift Lock (ASL) . .. .. .. .. . 138
Driving .. ................. .. .... . 139
Emergency mode .......... ... .. .. . 141
Emergency release ......... ... .. .. . 141
Hill descent control ........... .. ... 140
Ignition key safety lock ...... .. .. .. . 105
Kick-down .. ... .......... .. .. .. .. . 141
Manual shift program ......... .. .. . 140
Selector lever .................... . 13 7
Shift buttons . . . . . . . . . . . . . . . . . . . . . 140 AUTO mode
A/C climate controls ............ ... . 95
Auto Safety Hotline ............. .... 171
Average speed . . . . . . . . . . . . . . . . . . . . . . . 24
Avoid damaging the vehicle ........ ... 234
B
Bass box
Battery .... .. .. .. .. ........... ... .
Battery location .. ................ .
Charging ...... .. .. ... ........... .
Important warnings when working on
the battery .... .. ............. ... . 295
268
269
270
269
Jump starting .. .. ... .......... .. .. 307
Low ..... ..... ............... .... 229
Replacing the battery .............. 272
State of charge ................... . 229
Voltage ... .... ................... . 35
Winter operation . ............. .... 268
Working on the battery .. .... ... .. .. 269
Before driving ..... ............. .... 164
Blended gasoline .. ................ . 249
Booster seats . . . . . . . . . . . . . . . . . . . . . . 212
Brake fluid
Changing the brake fluid ............ 268
Checking the brake fluid level ..... ... 267
Reservoir ... .. .. .. .............. . 267
What is the correct brake fluid level? .. 267
What should I do if the brake fluid warn-
ing light comes on? ...... ...... .. .. 267
Brake light Defective . . . . . . . . . . . . . . . . . . . . . . . . . 23
Brake system .... ... .............. .. 267
Anti-lock brake system . . . . . . . . . . . . . . 18
Brake assist system ................ 224
Brake booster .... ............. .... 226
Brake fluid . ..... ................ . 267
Brake fluid specifications for refill and re-
placement .... .. ............. .... 268
Brake pads .. .. .. ..... ........... . 232
General information .............. . 226
How does moisture or road salt affect the
brakes? . .. .. .. .. ............. .. .. 226
Malfunction . . . . . . . . . . . . . . . . . . . . . . . 32
Parking brake .. .. ... .......... .. .. 109
Warning/indicator lights ............. 19
Worn brake pads symbol . . . . . . . . . . . . . 36

Braking guard
re fer to Audi braking gua rd ... .. .. .. . 127
Break- in pe riod ............ .... .. ... 232
Brake pads . ............. .. .. .. ... 232
T ires .... .. .. ............. .. .. ... 232
Breakoverang le ............ ... ... .. 237
Bulbs ..... .. .. .. .. .. .... ... .. .. ... 305
B umper cover
C au tion when parking near a parking ba r-
rier or c urb ... .... .... ... .. .. .. ... 110
C
Ca lifo rnia Proposit io n 65 Wa rning .. .. . 258
B att ery specific .......... .. .. .. .. . 270
Capac it ies . . . . . . . . . . . . . . . . . . . . . . . . . 315
Car - Systems Ambience lighting ........ .. .. .. .. .. 62
Lighting prof iles .......... .. .. .. .. .. 62
Carbon parts Clean ing . . . . . . . . . . . . . . . . . . . . 246, 247
Care ...... ... ...... ............. .. 24 4
Cargo area
refer to Load ing the luggage compart-
ment .. .. .. .... ... .. ... ... .. .. .. . 170
Cargo floor . ... .... .... ... .. .. .. .... 83
Ca rgo net ...... .............. ... ... . 81
Cata lytic converter ......... .. .. .. .. . 233
Center armrest Cup holder . . . . . . . . . . . . . . . . . . . . . . . . 78
Storage compartment . . . . . . . . . . . . . . . 78
Cente r console in rear ....... .. .. .. .. .. 79
Centra l locking
Emergency locking ........ .. .. .. .. .. 45
Panoramic slid ing su nroof ...... . ... .. SS
Certification . . . . . . . . . . . . . . . . . . . . . . . 319
C hanging a flat tire ......... .. .. .. .. . 297
Changing a w heel .......... .. .. .. .. . 297
Changing engine o il ..... ... .. .. .. .. . 263
Chass is
refer to Adaptive Air Suspe nsion . lSS, 157
CHECK button ............. .... .. .... 12
C hec king
Eng ine coolant leve l .... ... .. .. .. .. . 265
Checking tire pressure ......... .... .. 279
Inde x 323
Child rest raints
Danger of using child restraints in the
f ront seat . . . . . . . . . . . . . . . . . . . . . . . . 185
Where can I get additional informat ion
about child restraints and the ir use? .. 223
Child rest rain t system anchors . ... .. .. 217
Child safety ....... .. ............... 204
Co nve rtib le loc kin g retractor ..... .. .. 214
G ui dance fixtures for lower ancho rages 219
Impo rtant sa fe ty inst ructions for using
c hi ld safety seats ... . .. ..... ... .. .. 207
Impo rtant t hings to know when driving
with children . ...... .. .. ..... ... .. 204
Installing a ch ild restra int using the
LATCH system .. .. ................. 220
Mounting and releasing the anchorage
hook . ...... .. .... .......... ..... 220
T ether anchors .... ............... . 221
T ether st raps .. .. .... ........... .. 221
Child safety lock rear doors (power) . . . . . . . . . . . . . . . . . . 48
Child safety seats .... . .. ..... ... .. .. 210
Booster seats . ..... . .. .. ..... ... .. 212
Convertib le child seats ............. 211
Convertib le locking retractor ....... .. 214
Danger of using child restraints in the
front seat . . . . . . . . . . . . . . . . . . . . . . . . 18S
How do I properly install a child safety
seat in my veh icle? ............. .... 20 7
Infan t seats . .. .. .... ............. 210
Installing . .. .. .. ............... .. 214
L ATCH system . ...... .. .. ..... ... .. 220
Safety instr uctions . .. .. ..... ... .. .. 207
Un used safety be lts on the rear seat 209
Child sea ts
L owe r anchorages .... ......... .. .. 218
Cleaning ......... .. ..... .......... 244
Climate control . ..... . .. .. ..... ... .. . 92
Synchroni zing .. ...... ............. . 93
Warm and co ld . .. ............. .. .. . 92
Climate controls Air conditioner on/off ... .... ... .. .. . 94
Air distrib ution ..... . .. ..... ... .. .. . 9S
Air out lets .. .. .. ................. . 97
Air out lets (rear) . ................. . 97
Air recircu lation .. .. ........... .... . 96
AUTO (standard sett ing) .. .. ... ... .. . 9S
Bas ic sett ings .. .. .. ..... .......... 100
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