check engine light AUDI A7 2015 Owner's Manual

236 Check ing and filling
&
Batt ery aci d c ont ain s s ulfuric acid .
A lw ay s w ear gloves a nd eye protec-
ti on.
@
No
- spark s
- flame s
· sm okin g.
A
When a b atte ry is ch arged , it p rodu -
ce s hydr oge n ga s wh ich i s ex plosi ve
.
and co uld cause pe rso nal injur y.
®
Alway s keep the batt ery well out of
re ach of children.
A WARNING
Whenever working on the battery or on
the electrical system, there is the r isk of
injury, acc ident and even fire. Read and
heed the following WARNINGS:
- Always wear eye protection. Do not let
battery acid or any lead part icles get on
your sk in or cloth ing . Sh ield your eyes .
Explosive gases can cause blindness or
other injury.
- Battery acid contai ns sulfur ic acid. Sulfu­
ric acid can cause blindness and severe
burns.
- Always wear gloves and eye protection.
Do not tilt the battery because ac id
could leak out of the vent ilation open­
ings.
- If you get battery acid in your eyes or
on your sk in, immediately rinse with
cold water for severa l m inutes 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 cab les.
- 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,
wh ich 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 negat ive ground ca­
ble.
- Before performing any work on the e lec­
trica l system, switch off the engine and
ignit ion 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 swi tc h off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you wi ll set off the alarm.
- When disconnecting the battery, f irst
d isconnect the negat ive cab le and then
the posit ive c ab le.
- Before reconnecting the batte ry, ma ke
sure all e lectr ica l consumers are sw itch­
ed off. Re connect the pos it ive 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 exp lode! 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 s ide of the bat­
tery.
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways rep lace a damaged battery.
A WARNING
Ca lifornia Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories conta in lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems . Wash hands after han-
dling.
~

238 Check ing and filling
cracked an d weake ned when the battery
froze.
- Charge the battery in a we ll ventilated
area. Keep away from open flame or elec­
trical spark. Do not smoke. Hydrogen gas
generated by the battery is explosive.
- To reduce the danger of explosion, never
connect or disconnect charger cables
wh ile the charger is operating.
- Fast charg ing a battery is dangerous and
should only be attempted by a compe­
tent technician w ith the proper equip­
ment.
- Battery acid that may spill during charg­
ing should be washed off w ith a solution
of warm water and baki ng soda to neu­
t rali ze the acid.
~ Note
Never use a fast charger as a booster to
start the engine. This will seriously dam­
age sensitive el ect ronic components, such
as co ntrol units, relays, rad io, etc., as we ll
as th e batte ry charge r.
Battery replacement
The new battery must have the same specifi­
cations and dimensions as the original equip­
ment battery.
I ntell igent energy management in your vehi­
cle is respo nsible for d ist ributing the electr i­
cal energy throughou t you r vehi cle
~ page 201. The inte lligen t energy manage­
ment system w ill keep the engine battery
charged better than vehicles without t his sys­
tem . To make sure the additional electrical en ­
ergy is available 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 t ime your vehicle was delivered). Specifi­
cations a re listed on the battery hous ing. You r
author ized de aler m ust code the battery in
the energy management system to enable yo u
to use the energy managemen t fu nctions co r­
rectly after replacing the battery. T
he new battery must have the same capacity,
vo ltage ( 12-volts), amperage, construction
and plug sealing.
When ins tall ing t he battery, make su re the ig­
nition and a ll elect rical consume rs are switch ­
ed off.
(D Note
Make sure the ven tilat ion hose on the side
of the ba ttery is connecte d, otherwise
fumes or batte ry acid can lea k out .
- Ve hicles with the Start-S top-System * are
equip ped with a spec ial cycle-proof AGM
battery . Install ing a d iffe rent type of
battery can cause problems in the vehi­
cle e lectr ica l system. Whe n replac ing the
vehicle battery, always install one w ith
t he same specifications as the o rigi na l
battery.
@) For the sake of the environment
Because of the prob lem of proper disposal
of a battery, we recomme nd your author­
i zed Audi dealer change the battery fo r
you. Batteri es contain sulfur ic acid and
l ead and must a lways be di spo sed o f prop­
erly in comp liance wi th all envi ronmental
regulations. Disposing of vehi cle batter ies
imprope rly is very dange rous to the envi­
r onment.
Windshield/headlight*
washer container
F ig . 1 99 Engine compartment: cover on the windshield
a n d headl ight * was her fl ui d reservo ir
ll>

300 Index
AUTO automatic climat e control .. .. ... ... ..
73
Automatic headlights ....... .. .... .. 44
climate control . . . . . . . . . . . . . . . . . . . . . 70
Auto Lock . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3
Automatic belt retractor .. ... ..... .. .
141
Automatic climate control
Air vents . .... ........... .... .... ..
7 3
Automatic recirculation .... .. .. .. .. . . 74
Opera tion . . . . . . . . . . . . . . . . . . . . . . . . . 72
Setup . .. .. ................ ... .. .. 74
synchron izing .... ......... ... .. .. .. 73
Automatic Shift Lock (ASL) .... .. .. .. . 110
Automatic transmission ..... .. .. .. .. . 109
Automatic Shift Lock (ASL) .......... 110
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Emergency mode . . . . . . . . . . . . . . . . . . 114
Emergency release .......... .. .... . 115
Kick-down ............... .. .. .... . 113
Manual shift program ..... .... .... . 113
Selector lever . . . . . . . . . . . . . . . . . . . . . 109
Automatic wipers .................. .. 48
Auto Safety Hotline ........ .. .. .. .. . 136
Ave rage consumption ....... .. .. .. .. . . 25
Average speed . . . . . . . . . . . . . . . . . . . . . . .
25
Avoid damaging the vehicle .. .. .. .. .. . 204
B
Brake fluid
Changing the brake fluid ............
234
Checking the brake fluid level ........ 234
What is the correct brake fluid level? .. 234
What should I do if the brake fluid warn-
ing light comes on? ................
234
Brake system
Anti- lock braking system . . . . . . . . . . . . .
19
Brake assist system . ....... .... .. .. 195
Brake booster .. ... .............. .. 199
Brake fluid .. .. .. .......... ...... . 234
Brake fluid specifications for refill and re-
placement ...... ................ .
234
Brake pads .... .. ............. .... 203
Electromechanical parking brake ... .. . 79
Fluid reservoir ... ................ . 234
How does moisture or road salt affect the
brakes? . . . . . . . . . . . . . . . . . . . . . . . . . .
198
Warning/indicator lights ........ .. .. . 15
Worn brake pads symbol . . . . . . . . . . . . . 20
braking guard
Settings .. .... .. .. .............. ..
93
Brak ing guard . .. .. .......... ...... .. 86
Messages ... .. .. .. ....... .... .... . 93
Break-in period .. .. ............. .... 203
Brake pads .. ... . ... ... .... ... .. .. 203
Tires ........ ... .. .............. . 203
Bulbs .......... .. .. .............. . 284
Bag hooks . . . . . . . . . . . . . . . . . . . . . . . . . . 67 C
Battery ..... ................ ..... .
Charging ................... ..... .
Important warnings ...... .. .. .. .. .
Jump starting . .... ....... .. .. .. .. .
Location
. .. .... ........... .. .... .
low ..... .. ................ ... ' . .
Replacing the battery ..... .. .. .. .. .
State of charge ........... .. .. .. .. .
w· t · 1n er operation ......... .... .... .
Working on the battery .... .. .. .... .
Before driving .............. ... .. .. .
235
237
235
285
235
201
238
201
235
235
128
Blended gasoline . . . . . . . . . . . . . . . . . . . 217
Blower (automatic climate control) . . . . . . 73
Blower (climate con trol) . . . . . . . . . . . . . . . 70
Booster seats .............. ... .... . 182
California Proposition 65 Warning ..... 226
Battery specific .. ............. .... 236
Capacities .. .. .. .. ............. .. .. 292
Engine oil ..... .. ............. .... 227
Carbon par ts
Cleaning . . . . . . . . . . . . . . . . . . . .
214,215
Car carrier
Transporting your vehicle ....... ....
289
Care ..... .. .. .. .. .... ......... .... 212
Cargo area ...... .. .. ... ........... . 134
Cargo net . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Catalytic converter . ... .. ... ..... .. .. 204
Center armrest
Cockpit . .. .. .. .. ............. .. .. .
56
Central locking .... ............. ..... 33
Emergency locking ................ ..
37

M N <( (.J
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Data ...... .. .... .. .... ... .. .. ... 293
Start-Stop -System . . . . . . . . . . . . . . . . . . 81
start ing . ... .... ...... ... .. .. .. .. .. 76
Starting with jumper cab les .. .. .. .. . 285
Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . 77
E ng ine compartment .... ... .. .. .. .. . 22 7
C losing the hood . ..... ... .. .. .. .. . 226
Opening the hood ..... ... .. .. .. .. . 225
Safety instructions ........ .. .. .. .. . 225
Working in the engine compartment . . 225
E ng ine coolant ... ...... ... .. .. .. ... 231
Adding coolant . .. ..... ... .. .. .. ... 232
Chec king the engine coolant leve l .. .. . 23 1
Expansion tank ........... .... .. .. . 231
Malfunct ion symbo l ....... .. .. .. .. .. 16
Radiator fan .............. ... ... .. 233
Temperature gauge ........... ... ... 11
Engine oil ... .... .. .... ... .. .. .. ... 227
Adding .. .. ............. .... .. ... 229
Addit ives . .. ............. .... .. .. . 229
Changing .. .. ... .. ... ... .. .. .. ... 230
Checking the eng ine o il level .. .. ... .. 229
I ndications and cond it ions requ iring ex-
tra check ing ............. .... .. ... 229
I ndicator ligh t . . . . . . . . . . . . . . . . . . . . . 18
O il cons umption .......... .. .. .. .. . 228
P ressu re mal func tion ... ... .. .. .. .. .. 17
Recommended oil check intervals . ... . 229
Sensor defect ive . . . . . . . . . . . . . . . . . . . . 22
Specification and viscos ity .. .. .. .. .. . 227
E ng ine sound ............. .... .. .. . 10 2
Eng ine speed limitat io n ........ .. .... . 21
Engine start -stop mode
refer to Start-Stop-System . .. .. .. .. .. 83
E ng ine star t sys tem (indicator l igh ts) .. .. 18
Env ironment
Break- in period ........ ...... .... .. 203
Cata lytic converter ........... .... .. 204
D iese l par ticul ate fi lter .... .. .. .. .. . 205
Di sposing of yo ur vehicle ba ttery .. .. . 238
D riving a t high speeds .. ... .. .. .... . 206
D riving to minimize pollution and noise 205
Fu el . .... .. .. ... .. ..... ... .. .. ... 219
F ue l economy ............ .... .. ... 205
Leaks under your veh icle ... .. .. .. .. . 225
Lett ing the veh icle stand and warm up . 206
Proper disposal of dra ined brake flu id . 234
Inde x 303
Proper disposal of d rained eng ine cool -
ant . ... .. .. .. .... . ... ...... ... .. 232
Proper disposal of d rained eng ine
o il . . . . . . . . . . . . . . . . . . . . . . . . . 229, 230
Recycling used engine oil ............ 229
Un leaded fuel .. ... ................ 217
What should I do with an o ld battery? . 238
Event Data Recorder (EDR) . . . . . . . . . . . . 194
E xhaust tail pipes
Cleaning .. .. .. .. .. . .............. 213
Expansion tank .. ... ...... .......... 231
Exterior lighting ..... . .. .. ..... ... .. . 44
E xte rior m irrors
Adjus ting . .. .. .. .... ........... .. . 50
Di mming . ... .. .. .. .. .. ...... ... .. . 51
Heating ... .. .... ... .. .. ..... ... .. . 50
Exterior temperature display ........... 24
F
Fastening
Boos ter seats .. .. .. . .. .... .... .. .. 182
Co nvertib le child safety seats ........ 180
Infan t seats . . . . . . . . . . . . . . . . . . . . . . 179
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . 133
Foot peda ls ... .. .... . ... ...... ... .. 133
Fo r the sake of the environment
Gasoline fumes and t he env ironme nt .. 219
Red ucing engine noise by early upshift -
i ng ....... .. .. .. ... ............ ... 11
Ref ueling ... .... ... .. .. ..... ... .. 219
Saving f uel by early upshifting ... .. .. . 11
Fo ur- zone automatic climate control . .. . 72
Front airbags Descrip tion . . . . . . . . . . . . . . . . . . . . . . . 151
How they work . ......... ......... . 157
Frontal coll isions and the laws of physics 139
Fron t seats . . . . . . . . . . . . . . . . . . . . . . . . . 53
Adjus ting . .. .. .. .. ............... 13 0
Child rest rain ts in the front seat . ... .. 149
Fuel Additives .. .. .. .... .......... ..... 217
B lended gaso line . ............. .... 217
C u rrent cons umption .. ......... .... . 25
E conomy messages (eff icien cy program) 26
F uel fi ller flap emergency release ... .. 221
F uel fi ller neck ..... . .. .. ..... ... .. 219
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 12
•
•

304 Index
Gasoline ........ ......... ... .... . 21 7
Gasoline additives ................. 218
Low fuel level symbo l . . . . . . . . . . . . . . . 22
Octane rating ............ .. .. ..... 217
Recommendation ......... .... .... . 217
Refuelling .. ................ ... ... 219
Reserve .. .. ... .... ...... .. .. .. .. .. 12
Tank capacity . . . . . . . . . . . . . . . . . 12, 292
Fuses Assignment ................. .... . 281
Replacing .. ..... ........... ... .. . 281
G
Garage door opener (Homelink) .. .. .. . . 42
Garment hooks ............ .... .. .. .. 61
Gas discharge lamps ............ .. .. . 284
Gauges Engine coolant temperature .... .. .... 11
Fuel gauge ... ........... .... .... .. 12
Speedometer ... .... ..... .... .. .. .. 27
Tachometer ................ ... ... . 12
Trip odometer .. ...... .... ... .. .. .. 27
General illustration ............ .... ... 8
Generator (warning/ indicator lights) .... 17
Glossary of tire and loading terminology 242
Glove compartment (cooled) ........... 61
Glow plug system Indicator light . . . . . . . . . . . . . . . . . . . . . 21
Gross Vehicle Weight Rating (GVWR) .. . 291
H
Head -up Display . . . . . . . . . . . . . . . . . . . . . 28
H eadlights
Cleaning ... ................ ..... . 213
C leaning system .................... 48
Defective . ................. ..... .. 22
Headlight range control . . . . . . . . . 22, 44
Washer reservoir ......... .. .. .... . 238
H ead restraints . . . . . . . . . . . . . . . . . 56, 132
Adjusting .. ................ ..... . 132
Fr ont seats . . . . . . . . . . . . . . . . . . . . . . . . 56
Rear seats .... ........... .... .... .. 57
Removing ............... .. .. .. .. .. 57
H eated
exterior mirrors . . . . . . . . . . . . . . . . . . . . SO
rear window (automatic climate contro l) 73 rear window (climate cont
ro l) . . . . . . . . . 71
seats (automatic climate control) ...... 73
seats (climate contro l) . . . . . . . . . . . . . . . 71
Steering wheel ... ............. ..... 74
windshield washer spray nozzles . .... . 48
Heating ... ..... .. .. .............. .. 69
Heavy clothing and safety belts ........ 141
High beam .. ...... ............. ..... 46
High voltage warning label ..... .. .. .. 291
Hill descent control ................. 112
Homelink (garage door opener) ..... .. . 42
Hood (release lever) .. ........... .. .. 225
Hooks . .. .. .. .. .. ............... .. . 67
Horn ..... ..... .. ................ ... 8
How are child restraint system anchors re-
lated to chi ld safety .......... ...... . 187
How many airbags does my vehicle have? 155
How often should I check my tire pres-
sures? ......... .. .. .............. . 253
How safety belt pretensioners work .. .. 145
Hydroplaning ...................... 260
I
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . 27
Important things to do before driving .. 128
Improperly worn safety belts ...... .. .. 144
Ind icator lights
Dynamic steering ................. . 200
also refer to Warning/indicator lights .. 12
Infant seats .. .. .. ... .......... .... 179
Installing child safety seats Safety belts . . . . . . . . . . . . . . . . . . . . . . 184
Installing the upper tether strap on the
anchorage . . . . . . . . . . . . . . . . . . . . . . . . . 190
Instruments Adjusting the light ing .......... .... . 47
Instruments and controls General illustration . . . . . . . . . . . . . . . . . . 8
Instrument cluster ................ .. 11
Interior lighting
Ambience lighting ............. .. .. . 47
Front and rear ... ....... ...... .. .. . 47
Intermittent (windshield wipers) ... ... . 48

M N <( (.J
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Starting from rest . . . . . . . . . . . . . . . . . . . . 80
Starting off with a trai ler .............. 80
St arting the eng ine . ..... .. .. .. .. .. .. 76
S teer ing
E lectrically ad justab le steer ing whee l .. 75
M anually adjustab le steering whee l .. .. 75
also ref er to Electromechanica l power as-
sist . .... .. ................. .. ... 200
S teer ing whee l
E asy entry featu re ..... ... .. .. .. .. .. 76
I ndicator light . . . . . . . . . . . . . . . . 18, 200
Steer ing whee l heating . ... .. .. .. .. .. 74
Steer ing whee l co lumn
Ad justing e lec trica lly ...... .. .. .. .. .. 75
Ad justing manually .... ... .. .. .. .. .. 75
Steer ing whee l with t iptronic . .. .. .. .. . 113
Steps fo r determining correct load limit . 257
Stopping the engine . . . . . . . . . . . . . . . . . . 77
Storage . . . . . . . . . . . . . . . . . . . . . . . . 60, 64
S tronic transmission Launch Contro l Program . . . . . . . . . . . . 113
S tron ic (automatic t ransm ission) . .. .. . 109
Sunroof ... .. .. ............. .. .. .... 41
Sun shade . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Sun visors . ................ ... ... ... 4 8
Symbo ls
refer to Warning/ind icator lights .. .. .. 12
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 1 2, 24
Ta il lights
C le a ning . .. ................. .. ... 2 13
T OI clean diese l
refer to AdBlue ............ ... ... .. 22 1
T ec hnica l data . ... .. .... ... .. .. .... . 29 1
Techni cal mod ifications ..... .. .. .. .. . 297
T emperature d isp lay ..... ... .. .. .. .. .. 24
Tether anchors ... .. .... ... .. .. .. ... 190
Tethe r strap . ................ ... ... 190
Textiles Cleaning . .. .... ............. .. .. . 215
The first 1,000 mi les (1,500 km) and after -
wards ..... .. .. ... .. ..... ... .. .. ... 203
Three-zone cl imate co ntrol .. .. .. .. .. .. 70
Tie-downs . . . . . . . . . . . . . . . . . . . . . 66, 135
Inde x 309
Tips for the environment
Saving f uel . ... .. .. . ... ...... ... .. . 63
t iptron ic (automat ic t ransm ission) 109, 113
Tire pressure .. .. .. ................. 252
T ire pressure mon itoring system ... .. .. 270
Tires ...... ... .. .... .......... ..... 240
Se rv ice life .. .. .. .. .......... ..... 258
Speed ra tin g letter code ........ .... 263
T ire manufac turing date
T ire specifications . .. .. ..... ... .. . .
Tread depth ....... . .. .. ..... ... . .
U niform tire quality grading .. ... .. . . 2
62
262
258
266
Winter tires . .. .. ................. 267
T ires and vehicle load lim its ....... .. .. 255
Tires and wheels Check ing t ire pressu re .. .... ... ... .. 252
Co ld tire inflation pressure .......... 247
D ime nsions .. .. .. ................. 260
General notes .. .. .... ........... .. 240
G lossary of tire and loading term inolo -
gy .. ... .. .. .. .... . ... ...... ... .. 242
Low aspect ratio tires . .. ..... ... .. .. 269
New tires and wheels ........... .... 260
Rep lacing . .. .. .. .... ........... .. 261
Snow cha ins . .. .. ................. 268
Tires and veh icle load limits ......... 255
Wheel bolts ... .. .. . .. .... .... .. .. 269
Winter tires ...... ................ 267
Tire service life .. .. ............... .. 258
T oo ls ...... .. .. .. .... ............. 273
Torn or frayed safety belts ............
141
Towing
Tow truck procedures ........... .... 287
T PMS
T ire pressure monitoring system ... .. 2 70
T ra iler tow ing . .. .. .. ... ....... ..... 208
Operating instr uctions ............. . 208
Pa rking system . .. ............... .. 12 7
T echnical requiremen ts . . . . . . . . 208, 209
T rai le r tow ing tips . ... ...... ... .. .. 210
Trai n (transporting your veh icle) ...... . 289
Transmiss ion . ... .. .. .. ... ..... ... .. 109
T rans miss ion malfunc tion ( indi cato r
li gh t) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
T ransport Canada ......... .......... 136
T ransporting yo ur vehicle . ..... ... .. .. 289
T read Wea r Ind icator ( TW I) ....... .. .. 258
•
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