2015 AUDI S3 SEDAN relay

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Trailer mode Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation .
If you plan to tow a tra iler, p lease remember that
the additiona l load will affect d urability, econo­
my and performance .
T railer towing not on ly places more stress on the
vehicle, it a lso calls for more concentrat ion from
the dr iver .
F or this reason, a lways fo llow the operating and
d riving instructions provided and use common
sense.
Technical requirements
Traile r hitch
Use a weight-carrying hitch conforming to the
gross trailer we ight. The hitch must be suitable
for your vehicle and trai ler and must be mounted
securely on the veh icle 's chassis at a technically
sound
location . Use on ly a tra iler hitc h with a re­
movable ba ll mou nt. Always chec k w ith the t ra il­
e r hitch m anu fac tur er to make sure that you a re
using the co rrec t hitch.
Do not use a bumper hitch .
The hitch must be installed in such a way that it
does not i nterfere wit h the impact -absorbi ng
bumper system. No mod ificat ions should b e
mad e to the vehicle exhaust and brake systems .
Fr om time to t ime, c hec k t hat a ll h itch mou nti ng
bo lts remain sec urely fastened .
When you are no t tow ing a trailer,
remove the
trai ler hitch ball mount . Th is prevents the hitc h
fr om caus ing damage should you r vehicle be
s truck from behind~,&. .
Trailer brakes
If yo ur tra iler is equipped w it h a braking system,
check to be s ure that it conforms to all regu la­
tions.
Trailer mode
T he trailer hyd raulic brake system must not be di ­
rect ly connected to the ve hicle's hydraulic b rake
system .
Safety chains
Always use s afe ty chains be tween your ve hicle
and the tra ile r.
Trailer lights
Tra ile r li ghts must meet all regulations. Be sure
to check w it h your Aud i dea le r fo r corr ect w irin g,
swi tches and relays.
Mirrors
If you a re unable to see the traffic behind you us­
i ng the regular o uts ide mirrors, then you
must in ­
sta ll extended mirrors .
It is importa nt that you
always have clea r vision to the rea r.
_&. WARNING
Afte r removing the trailer hit ch, d o no t store
i t in yo ur vehicle. In ca se of sudden br akin g,
the hitch could fly fo rward and inju re you or
your passengers.
Operating instructions
Maximum traile r weight
A trai le r fo r you r vehicle is limited to a typi cal
class 1 or class 2 trai le r.
Trailer load distribution
B e sure the load in the t raile r is held secure ly in
pla ce to p revent it from shift ing forward, back­
ward or sideways .
Never allow a pas senger to ride in a trailer~.&.
in Driving instructions on page 92.
Engine cooling system
Towing a trailer makes the engine work harder . It
is important tha t the cooling system 's pe rform­
ance is up to the additional load. Make s ure that
the coo ling system has enoug h flu id.
Tire pressure
When towing a trailer, inflate the tires of your ve-
hicle to the cold tire pressure listed under "Full
lilJJ..
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can be cracked due to ice formation and can leak battery acid.
Battery charging (Maximum charging rate of
30 amps / 14.8 Volt)
When charging at
low voltages (e.g . with a trickl e
charger ), the battery cab les do not have to be
d isconnected first. The battery caps shou ld
not
be opened when charg ing a battery .
It is not necessary to remove the battery from
the luggage compartment, and it is also not nec ­
essary to disconnect the cables .
Fast charging the battery (charg ing rate
a bo ve 14.8 Volt s)
F or technical reasons do not use a battery charg­
er that us es voltage greater than 14 .8 Volts to
charge your vehicle's battery.
A WARNING
Charging a battery can be dangerous.
- Always fo llow the operating instructions
provided by the battery charger manufactur­
er when charging y our battery.
- Never charge a frozen battery. It may ex­
plode because of gas trapped in the ice. Al­
low a frozen battery to thaw o ut first.
- Do not reuse batteries which were frozen .
The battery hous ing may have cracked and
weakened when the battery froze.
- Charge the battery in a well ventilated area .
Keep away from open flame or electrical
spark . Do not smoke. Hyd rogen gas generat ­
ed by the battery is explos ive .
- To reduce the danger of explosion, never co nnect or disconnect cha rger cables while
the cha rger is operating .
- Fast charg ing a battery is dangerous and
should only be attempted by a competent
tec hnician with the p roper equipment .
- Battery acid that may spill during charg ing
should be washed off w ith a so lution of
wa rm water and baking so da t o n eutrali ze
t he a cid .
Checking and Fillin g
(D Note
Never use a fast charger as a booster to start
the engine . This will ser iously damage sensi­
tive electronic components, s uch as control
units, relays, radio, etc., as well as the battery
charger .
Battery replacement
The new bat tery mus t hove the some specifica­
tions and dimensions as the original equipmen t
battery.
Intelligent energy management in your vehicle is
responsible for distributing the electrical energy
t h roughout your vehicle
Q page 128 . The intelli ­
gent energy management system w ill keep the
engine batt ery charged better than vehicles with­
out this system. To ma ke s ure t he add it iona l elec­
t rical energy is av ailabl e once again afte r yo u
have changed the battery, we recommend tha t
yo u install batteries of the same type and man u­
facture on ly (the same as those insta lled at the
t ime yo ur vehicle was delivered). Specifications
are listed on the battery hous ing . Your author­
ized dealer must code the battery in the energy
manageme nt system to enab le you to use the en­
ergy ma nagement fu nctions cor rectly afte r re­
plac ing the battery .
The new battery mus t have the same capacity ,
vo ltage (12 -volts), amperage, construction and
plug seal ing.
When install ing the battery, make sure the ign i­
t ion and all electr ica l consumers are switched off.
(D Note
Make sure the ventilat ion hose on the side of
the battery is connected, otherwise f umes or
battery acid can lea k out.
~ For the sake of the environment
Because o f the prob lem of proper disposal of
a battery, we recommend you r authorized
A udi dealer change the battery for you. Bat­
teries contain sulfur ic acid and lead and must
always be dispose d of properly in complia nce
with a ll envi ronm ental regulations. Disposing ..,.
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-Some of the equipment listed in the follow­
ing tables applies only to certain model
versions or certain opt ional equ ipment.
Interior fuse ass ignment
F ig. 186 Vehicle interior: fuse assignment
No. Equipment
Fl Engine components
F2 Seat
adjustment
F3 Hydraulic pump cover (Cabriolet)
F4 MM
controls, MMI-components
FS Gateway
F6 Anti-theft
alarm system
Climate/heati ng control, selector lever
F7 (automat ic transm ission), parking heater,
rear window heater relay coil
Diagnosis, electromechanical parking
F8 brake switch, light switch, rain/light sen-
sor, interior lighting
F9 Steering column switch module
FlO Display
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Fll Reversible
driver's side safety belt tension-
ers
F12 MMI area
F13 Adapt ive dampers control module
No.
Fl4
FlS
Fl6
F 1 7
F18
F19
F20
F23
F 24
F 25
F 26
F27
F28
F29
F 31
F32
F 33
F34
F3S
F 36
F37
F 39
F 40
F 41
F42
F43
F 44
Fu ses a nd bulb s
Equipment
Climate control system blower
Electronic steering co lumn lock
MMI area
Instrument cluster
Rearview camera
Conv ince key system control mod ule, tank
system
Tank system
Exterior lighting, heated washer fluid noz-
zles
Panorama sunroof/ power top control
module, power top latch (Cabriolet)
Door/driver 's side doors (for example pow-
er windows)
Se at heating
Sound-amplifier
Power top control modu le, electronics
(Cab riolet)
Inter ior light ing
E xterior lighting
Driver assistance systems
Airbag
Button illumination, coils for upper cabin
heating relay (Cab riolet) and socket relay,
i nte rior sound, back- up light sw itch, tern-
perature sensor, oi l level sensor
Diagnosis, headlight range control system,
a ir quality sensor, automatic d imming
rearview m irror
Right cornering light/ right LED-headlight
Left cornering light/ left LED-headlight
Door/front passenger's side doors (for ex-
ample, power windows)
Sockets Reversible front passenger's side safety
belt tensioners
Central locking components, windshield
washer system
Head lights, l ight ing
a ll wheel drive
249

Fuses and bulbs
No. Equipment
F49 Starter, clutch sensor,
headlight relay coil
F53 Rear window defogger
The power seats* are protected via
circuit break­
ers
that automatically switch on after a few sec­
onds after the overload has been reduced.
(0 Tips
Note that the following table was accurate at
the time of printing and is subject to change.
Left engine compartment fuse assignment
Fig. 187 Engine compartmen t: fuse assig nme nt
No. Equipment
Fl ESC control module
F2 ESC control module
F3 Engine control module (gasoline/diesel)
Engine cooling, engine components, auxili-
F4 ary heater coil relay (1+2), secondary a ir
injection pump relay
FS Engine components, tank system
F6 Brake light sensor
F7 Engine components, water pumps
F8 Oxygen sensor
250
No. Equipment
F9 E
ngine components, exhaust door, glow
time control module, SULEV valve
Fl0 Fuel injectors, fuel control module
Fll Auxiliary heater heating element 2
F12 Auxiliary heater heating element 3
F13 Automatic transmission control module
FlS Horn
F16 Ign ition coil
F17 ESC
control module, engine contro l mod-
ule
F18 Terminal 30 (reference voltage)
F19 Windshie
ld wipers
F20 Horn
F22 Terminal 50 diagnosis
F23 Starter
F24 Auxiliary heater heating element 1
F31 Vacuum pump
F32 L
ED headlights
(!') Tips
Note that the following tab le was accurate at
the time of printing and is subject to change.
Bulbs
Replacing light bulbs
For your safety , we recommend that you have
your authorized Audi dealer replace burned out
bulbs for you.
It i s becoming increasingly more and more diffi­
cu lt to replace vehicle light bulbs s ince in many
cases, other parts of the car must first be re­
moved before you are able to get to the bulb.
This applies especially to the light bulbs in the
front of your car which you can only reach
through the engine compartment.
Sheet meta l and bulb holders can have sharp
edges that can cause serious cuts, and pa rts
must be correctly taken apart and then properly
put back together to help prevent breakage of
parts and long term damage from water that can .,,_