2020 AUDI Q3 auxiliary battery

Checking and Filling

Do not continue driving and switch the engine off
=> AX. See an authorized Audi dealer or authorized
Audi Service Facility for assistance.
= Electrical system: malfunction! Restart not
possible. Please contact Service
It will not be possible to restart the engine once
you turn it off. Vehicle functions/driving stability
may be limited. Drive to an authorized Audi deal-
er or authorized Audi Service Facility immediate-
ly.
= Electrical system: malfunction! Please con-
tact Service
Switch off all electrical equipment that is not
needed. Vehicle functions/driving stability may
be limited. Drive to an authorized Audi dealer or
authorized Audi Service Facility immediately.
= Electrical system: low battery charge. Bat-
tery will be charged while driving
The starting ability may be impaired.
If this message turns off after a little while, the
vehicle battery has charged enough while driving.
If this message does not turn off, drive immedi-
ately to an authorized Audi dealer or authorized
Audi Service Facility.

Z\ WARNING
When there is an electrical system malfunc-
tion, vehicle functions may not work and driv-
ing stability may be limited, which increases
the risk of an accident. Stop driving and
switch the engine off. See an authorized Audi
dealer or authorized Audi Service Facility for
assistance.

Battery
Pelee mee eerste)
Because of the complex power supply, all work on
batteries such as disconnecting, replacing, etc.,
should only be performed by an authorized Audi
dealer or authorized Audi Service Facility > A\.
Multiple batteries with different technologies
may be installed in your vehicle:
210
— Vehicle battery (for example, for starting the
engine, basic power supply) > page 211, Lead
battery or > page 211, Other battery types
— Auxiliary battery (for example, for recuperation
or optional equipment) > page 211, Other bat-
tery types
Not running the vehicle for long periods of
time
The battery will gradually drain if the vehicle
does not run for long periods of time. To ensure
that the vehicle can still be started, the electrical
equipment will be reduced or switched off
=> page 89. Some convenience functions, such as
interior lighting or power seat adjustment, may
not be available under certain circumstances.
These convenience functions will be available
again once you switch the ignition on and start
the
engine.
Even when electrical equipment is switched off,
the equipment can still drain the battery if the
vehicle is not driven for long periods of time.
Deep draining results in a chemical reaction that
destroys the inside of the battery. The battery
must be charged every month to prevent this
= page 212. Contact an authorized Audi dealer or
authorized Audi Service Facility for more infor-
mation.
Winter operation
Cold weather places higher demands on the bat-
tery. This results in reduced starting ability. Have
the battery checked by an authorized Audi dealer
or authorized Audi Service Facility before cold
weather begins.

Z\ WARNING
All work on the battery or electrical system in
your vehicle can result in injuries, chemical
burns, accidents, or burns. Because of this, all
work must be performed only by an author-
ized Audi dealer or authorized Audi Service Fa-
cility.

ZA\ WARNING
California Proposition 65 Warning: >

Fuses and bulbs

— Some of the equipment listed in the follow-
ing tables applies only to certain model ver-
sions or certain optional equipment.


Fig. 167 Left side of engine compartment: fuse assign-
ment

No. | Equipment
Engine components, engine start

Engine components, ignition coils
Brake light switch
Engine components



Heated oxygen sensors

OlOAIN
I
DA/Mm|A
Engine components

10 | Fuel pump

11 | Auxiliary heating, engine components

No. Equipment

18 Battery control module

19 Windshield wiper control module

20
Anti-theft alarm system, garage door
opener

21 Automatic transmission

22 Engine control module

23 Engine start

24 Auxiliary heating

31 Engine components

36 Left headlight

37 Parking heater


38

Right headlight




Fig. 168 Left side of cockpit: fuse assignment






Stability Control (ESC), engine control
17
module

250




12 | Auxiliary heating, engine components No. | Equipment
13 Automatic transmission, transmission flu- 1 | Exhaust treatment
id pump 2 | Front lumbar support
14 | Engine components, ignition coils 4 |MMI Infotainment system control module
15 | Horn 5 | Gateway control module (diagnosis)
16 | Engine components, ignition coils 5 Steering column lock, automatic transmis-
sion selector lever

83A012721BB
Fuses and bulbs



















No. | Equipment No. | Equipment
7 Radio receiver, parking heater, climate Right rear window regulator motor, front
control system controls 39 | passenger side door control module, right
Headlight range control, interior monitor- rear door control module
ing, ambient lighting, light switch, roof 40 | Sockets
8 | module, emergency call system, parking 41 |Passenger's side safety belt tensioner
brake, diagnostic connector, light/raih'sen- 42 |Vehicle electrical system control module
sor
= - 43 |Sound-amplifier
9 |Steering column electronics
- - 44 | All-wheel drive control module (quattro)
Display, MMI Infotainment system control
10 anadtile 4S Driver's side seat adjustment
11 | Vehicle electrical system control module 47 | Rearwindow wiper
12 |MMI Infotainment system control module a6 || Exteriorsound
13 | Driver's side safety belt tensioner 50 | tuggage: compartment lid
14 | Heating and A/C system blower 52. || Suspension
15 | Steering column lock 53 | Rear;window defogger
16 |MMI Infotainment system control module 54 | Left trailer hitch light
17 |Instrument cluster 29 | Ualler hitch
18 | Rearview camera, peripheral cameras 56. | Right trailer hitch light
19 | Vehicle opening/start (NFC) 87 [Trailer'hitch'socket
20 | Exhaust treatment, instrument cluster
; Bulbs
21 | Steering column electronics
23 | Panoramic glass roof Replacing bulbs
24 | Vehicle electrical system control module

25
Driver side door control module, left rear
window regulator motor, left rear door
control module

26 Vehicle electrical system control module

27 Vehicle electrical system control module

29
Roof module, vehicle electrical system
control module

30 Auxiliary battery control module

31 Luggage compartment lid

32 Driver assistance systems

33
Passenger occupant detection system,
front seat ventilation, headliner interior
light

34
A/C system components, parking brake,
reverse lights


35

A/C system components, diagnostic con-
nector, instrument panel control, rearview
mirror

Having a bulb replaced by an authorized Audi
dealer or authorized Audi Service Facility in cases
of doubt is recommended. These facilities have
the correct tools and replacement parts as well
as the required technical knowledge.
LED lights*
Your vehicle is equipped with maintenance-free
headlights and tail lights. However, if a light bulb
needs to be replaced, please contact an author-
ized Audi dealer or authorized Audi Service Facili-
ty.

ZA\ WARNING
If you still would like to try replacing the
bulbs in your vehicle yourself, read the warn-
ings regarding working in the engine compart-
ment > A\ in General information on
page 201. >

251