2016 AUDI Q3 relay

Trailer mod e
Trailer mode
Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation.
If you plan to tow a trailer, please remember that
the additional load will affect durability, econo­my and performance.
Trailer towing not only places more stress on the
vehicle, it also calls for more concentration from
the driver.
F or this reason, always follow the operating and
driving instructions provided and use common
sense.
Technical requirements
Tr aile r hitch
Use a weight-carrying hitch conforming to the
gross trailer weight. The hitch must be suitable
for your veh icle and trailer and must be mounted
securely on the vehicle's chassis at a technically
sound
location . Use only a trailer hitch with a re­
movable ball mount . Always check w ith the t rail­
er hitch man ufact urer to make su re that you are
using the co rrect hitch .
Do not use a bump er hit ch .
The hitch must be installed in such a way that it
does not interfere with the impact -absorbing
bumper system. No mod ificat ions should be
made to the vehicle exhaust and brake systems .
From t ime to t ime, check that a ll hitch mount ing
bolts rema in securely fastened.
When you are not tow ing a tra iler, remove the
tra iler hitch ba ll mount . This prevents the hitch
from caus ing damage shou ld your veh icle be
s truck from be hind ¢
,&..
Trailer brakes
If your trailer is equipped with a brak ing system,
check to be sure that it conforms to all regula­
tions .
164
The trailer hydraulic brake system must not be
directly connected to the vehicle's hydraulic
brake system ¢&. .
Safety chains
Always use safety chains between you r vehicle
and the trailer.
Trailer lights
Traile r lights must meet all regulations . Be sure
to check w ith your author ized Audi dealer for cor­
r ec t wiring , switches, and relays.
M irrors
If you are unable to see the traffic behind you us­
ing the regular outs ide mirrors, then you
must in­
stall extended mirrors . It is important that you
always have clear vision to the rear.
.&_ WARNING
- If a tra ile r has e lectr ica l brakes p lease no te
t hat these brakes are not activated by the
factory-fit ted contro l unit -risk of accident!
- After removing the trai ler hitch, do not
store it in your vehicle. In case of sudden
braking, the hitch co uld fly forward and in ­
jure you or yo ur passengers.
- Never install a "we ight distribu ting" or
"load eq ualizing" trailer hitch on your vehi­
cle. The vehicle was not designed for these
kinds of trailer hitches. The hitch attach­ ment can fail, caus ing the tra iler to tear
loose from the vehicle.
- The Gross Vehicle Weight Rating for your
veh icle, found on the safety compliance la­
be l on the driver's s ide B-pillar, must never
be exceeded under any circumstances . Ex­
ceed ing the Gross Vehicle Weight Rat ing of
your veh icle is likely to damage yo ur vehicle,
and such damage will not be covered by
your Limited New Vehicle Warranty . Exceed­
ing the Gross Vehicle Weight Rating will al ­
so change the performance and handling
characteristics of your vehicle, which could
cause a crash result ing in serious injury or
death.

Check ing and F illing
CJ) Note
Never use a fast charger as a booster to start
the engine . This will serious ly damage sensi­
tive electronic components, such as control
units, relays, radio, etc., as well as the battery
charger.
Battery replacement
The new battery must have the same specifica­
tions and dimensions as the original equipment
battery .
Intelligent energy management in your vehicle is
responsible for distributing the electrical energy
throughout your vehicle
¢ page 157. The intelli ­
gent energy management system wi ll keep the
engine battery charged better then veh icles w ith­
out this system. To make sure the addit ional
e lectrica l energy 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
time your veh icle was delivered). Specifications
are listed on the battery housing. Your author­
ized Audi dealer must code the battery in the en­
ergy management system to enable you to use
the energy manageme nt functions correctly after
replacing the battery.
If it is not possible to use a battery of this type,
the new battery must have the same capacity,
voltage (12-volts), amperage, construction and p lug sealing.
When installing the battery, make sure the igni­
tion and all electrical consumers are turned off.
@ Note
Make sure the ventilation hose on the side of
the battery is connected, otherw ise fumes or
battery acid can leak out.
@ For the sake of the environment
Because of the problem of proper disposal of
a battery, we recommend your authorized
Audi dea ler change the battery for you. Bat­
teries contain sulfuric ac id and lead and must
always be disposed of properly in compliance
190
with all environmenta l regulations. Disposing
of vehicle batteries improperly is very danger­
ous to the environment.
Windshield washer system
Fig. 155 Eng ine compartment: washe r fluid reservoir cap
M N
-N ,.:
"' m
The washer fluid reservoir O contains the wind­
shield washer flui d¢
page 179, fig. 149. The res­
ervoir capacity is found in
¢ page 230.
To reduce the risk of lime scale depos its on the
spray nozzles, use clean water with low amounts
of calcium . Always add window cleaner to the wa­
ter. When the outside temperatures are cold, an
anti-freez ing agent shou ld be added to t he water
so that it does not freeze .
(D Note
-The concentration of anti-freezing agent
must be adjusted to the vehicle operating
conditions in the respective climate. A con­
centration that is too high can lead to vehi­
cle damage.
- Never add radiator anti-freeze or other addi­
t ives to the washer fluid.
- Do not use a glass cleaner that contains
paint solvents, because th is could damage
the paint.

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.
Cockpit fuse assignment
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
9
Airbag control module, AIRBAG OFF indi-
cator light
12 Transmission control module
Air quality sensor for climate contro l sys-
tern, heated w indow washer nozzles,~
button, reverse light button<®>, oil level
13 sensor, climate control system, seat occu-
pant detection system, seat heating , but-
tons in the center console, automatic dim-
ming mirror
Engine control module, transmission con-
trol module, quattro control module,
14
brake lights, electromechanica l steering,
Gateway cont rol module, trailer hitch con-
trol module, ESC contro l module, light
switch, damping control module
Headlight range control module, instru-
ment illuminat ion, headl ights (left, right),
15 diagnostic connector, headlight range con-
trol module, crankcase housing heater, air
flow sensor, socket relay, DC/DC converter
16 Park ing system
17 Parking system rearview camera
18 TV tuner
19 E ngine starter control, DC/DC converter
220
No . Equipment
20
ESC contro l module, climate/heating con-
tro l, special functions interface
21 Selecto r mechanism power supply
22 Interior monitoring
© button, front interior lighting buttons,
23 diagnostic connector, light switch, light/
rain sensor, humidity sensor
25 Headlight power supply
26 Rear window wiper
27 Starter system
28 Infotainment
29
Supply for the park ing system rearv iew
camera and TV tuner
30 Infotainment
31 Infotainment
32 Instrument cluster
33 A utomat ic dimming rearview mirror
36
Cigarette lighter, cockpit/ luggage com-
partment socket
37 Cockpit/rear socket
38 Transmission control module
40 Trailer hitch control module
41 Trailer hitch control module
42 Trailer hitch control module
44 Rear window defogger
45
Electromechanical parking brake control
module
46 Trailer hitch control module
47 quattro control module
48 Aut omat ic lu ggage compartment lid con-
tro l module
so Fan
51
Electromechanical parking brake control
module
52 BCM
53 Fr ont seat heating
54 Panorama roof
55 Sun shade on the panorama roof
56 Adaptive dampers control module

Emergency situations
General
This chapter is intended for trained emergency
crews and working personnel who have the nec­
essary tools and equipment to perform these
operations.
Starting by pushing or
towing
(D Note
Vehicles with an automatic transmission
cannot be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine can be started by con­
necting it to the battery of another vehicle .
If the engine should fail to start because of a dis­
charged or weak battery, the battery can be con­
nected to the battery of
another vehicle, using a
pair of jumper cables to start the engine.
Jumper cables
Use only jumper cables of sufficiently large cross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated terminal
clamps which are distinctly marked :
plus(+) cable in most cases colored red
minus(·) cable
in most cases colored black.
A WARNING
Batteries contain electricity, acid, and gas.
Any of these can cause very serious or fatal in­
jury. Follow the instructions below for safe
handling of your vehicle's battery.
-Always shield your eyes and avoid leaning
over the battery whenever possible.
-A discharged battery can freeze at tempera­
tures just below 32 °F (0 °C). Before con­
necting a jumper cable, you must thaw the
Emergency situations
frozen battery completely, otherwise it
could explode .
- Do not allow battery acid to contact eyes or
skin. Flush any contacted area with water immediately.
- Improper use of a booster battery to start a
vehicle may cause an explosion.
- Vehicle batteries generate explosive gases.
Keep sparks, flame and lighted cigarettes
away from batteries.
- Do not try to jump start any vehicle with a
low acid level in the battery .
- The voltage of the booster battery must also
have a 12-Volt rating. The capacity (Ah) of
the booster battery should not be lower
than that of the discharged battery. Use of
batteries of different voltage or substantial­
ly different "Ah" rating may cause an explo­
sion and personal injury .
- Never charge a frozen battery. Gas trapped
in the ice may cause an explosion.
- Never charge or use a battery that has been
frozen . The battery case may have be weak­
ened .
- Use of batteries of different voltage or sub ­
stantially different capacity (Ah) rating may
cause an explosion and injury. The capacity
(Ah) of the booster battery should not be
lower than that of the discharged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
r::!)page 177.
(D Note
-Applying a higher voltage booster battery
will cause expensive damage to sensitive
electronic components, such as control
units, relays, radio, etc.
- There must be no electrical contact between
the vehicles as otherwise current could al­
ready start to flow as soon as the positive
(+) terminals are connected.
(D Tips
- The discharged battery must be properly
connected to the vehicle's electrical system. ..,.
223