2020 AUDI A3 ECU

8V2012721BK
Checking and Filling

Battery
eae mee eles)
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:
— Vehicle battery (for example, for starting the
engine, basic power supply) > page 315, Lead
battery or > page 316, Other battery types
— Auxiliary battery (for example, for recuperation
or optional equipment) > page 316, Other bat-
tery types
— Applies to: plug-in hybrid drive: High-voltage
battery (for example, for electric driving)
=> page 96.
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 82. 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 316. 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.

ZA WARNING
— All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
cal burns, accidents, or burns. Because of
this, all work must be performed only by an
authorized Audi dealer or authorized Audi
Service Facility.
— Never connect the charging cable or jump
start cable directly to your vehicle battery.
Only use the connections in the engine com-
partment > page 316.

Z\ WARNING
California Proposition 65 Warning:
— Battery posts, terminals and related acces-
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive problems.
Wash hands after handling.


@) Note
If the vehicle will be parked for long periods
of time, protect the battery against the cold
so that it will not be destroyed by “freezing”
= page 316, Charging the battery.
Lead battery
Explanation of warnings:
© Always wear eye protection.
Battery acid is highly corrosive. Always
wear protective gloves and eye protection.
® Fire, sparks, open flame, and smoking are
@/
aa


forbidden.
A highly explosive mixture of gases can
VN form when charging batteries.

Always keep children away from battery
®) acid and the battery.

Always follow the instructions in the oper-
ating manual.


@) For the sake of the environment

¥ Lead-acid batteries must be disposed of
using methods that will not harm the
315

8V2012721BK
Emergency assistance

> Lift the cargo floor using the plastic handle @)
until the cargo floor engages behind the tabs
@ in both side panels > fig. 263 (upper image).
> Fold the cargo floor back before closing the
luggage compartment lid.
Vehicle tool kit and cargo floor cover
Applies to: vehicles with version 2
The vehicle tool kit, tire mobility kit* and com-
pressor* are stored in the luggage compartment
under the cargo floor cover @) > fig. 262.
> Engage the plastic hook () in the luggage com-
partment seal > fig. 263.
> Fold the cargo floor back before closing the
luggage compartment lid.


Z\ WARNING
Applies to: vehicles with jack
Improper use of the vehicle jack can cause se-
rious personal injuries.
— Never use the screw driver hex head to tight-
en wheel bolts, since the bolts cannot attain
the necessary tightening torque if you use
the
hex head, potentially causing an acci-
dent.
— The factory-supplied jack is intended only
for your vehicle model. Under no circum-
stances
should it be used to lift heavy
vehicles or other loads; you risk injuring
yourself.
— Never start the engine when the vehicle is
raised, which could cause an accident.
— Support the vehicle securely with appropri-
ate stands if work is to be performed under-
neath the vehicle; otherwise, there is a po-
tential risk for injury.
— Never use the jack supplied with your Audi
on another vehicle, particularly on a heavier
one. The jack is only suitable for use on the
vehicle it came with.

G) Tips
The vehicle jack* does not require any mainte-
nance.
Vehicle tool kit/tire mobility kit/
eyes
Applies to: vehicles with plug-in hybrid drive
0) Bb + 3
> i a

Fig. 264 Luggage compartment: side trim panel
The vehicle tool kit, tire mobility kit and the com-
pressor are located in the side trim panel @) and
in the luggage compartment.
G) Tips
The vehicle must not be operated without the
tire repair set.
Tire mobility kit
Applies to: vehicles with tire mobility kit
> Read and follow the important safety precau-
tions in > page 348.
> Set the parking brake.
> Move the selector lever into the "P" position.
> Check if a repair with the tire mobility kit is pos-
sible > page 349.
Using the tire mobility kit
Applies to: vehicles with tire mobility kit

B8K-1475



Fig. 265 Tire: tire damage that cannot be repaired
349

8V2012721BK
Emergency assistance


» Wind the jack up further until the flat tire — Do not raise the vehicle until you are sure
comes off the ground > A\. the jack is securely engaged.
— Passengers must not remain in the vehicle
when it is jacked up.
— Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
Position the vehicle jack only under the designat-
ed lifting points on the sill > fig. 271. There is ex-
actly one location for each wheel. The jack must
not be positioned at any other location > AS ©.


An unstable surface under the jack can cause the — Make sure jack position is correct, adjust
vehicle to slip off the jack. Always provide a firm as necessary and then continue to raise
base for the jack on the ground. If necessary the jack.
place a sturdy board or similar support under the
jack. On hard, slippery surfaces (such as tiles) @) Note
use a rubber mat or similar to prevent the jack
from slipping owl, Do not Lift the vehicle by the sill. Position the
vehicle jack only at the designated lifting
A WARNING points on the sill. Otherwise, your vehicle will
be damaged.

— You or your passengers could be injured
while changing a wheel if you do not follow
Peon es imteen ene: Taking the wheel off/installing the spare
— Position the vehicle jack only at the desig- Follow these instructions step-by-step for chang-
nated lifting points and align the jack. ing the wheel.
Otherwise, the vehicle jack could slip and
cause an injury if it does not have suffi-
cient hold on the vehicle.
— A soft or unstable surface under the jack
may cause the vehicle to slip off the jack.
Always provide a firm base for the jack on
the ground. If necessary, use a sturdy
board under the jack.
— On hard, slippery surface (such as tiles)
use a rubber mat or similar to prevent the
jack from slipping.
— Only raise your vehicle with the vehicle
jack provided by the factory. If you use a
vehicle jack for another vehicle, your vehi-
cle can slide and cause injury.
— Changes in load can affect the height of
the vehicle.
— Never start the engine when the vehicle is
raised, which could cause an accident.
— Support the vehicle securely with appro-
priate stands if work is to be performed
underneath the vehicle; otherwise, there is
a potential risk for injury.
—To help prevent injury to yourself and your
passengers:
2 R + 4
0 a

Fig. 273 Changing a wheel: using the screwdriver handle
(with the blade removed) to turn the bolts
6 &
Tt
“ oO oO

~
Fig. 274 Changing a wheel: alignment pin inside the top
hole

After you have loosened all wheel bolts and
raised the vehicle off the ground, remove and re-
place the wheel as follows:


355

8V2012721BK
Emergency assistance

— If you notice that the wheel bolts are corroded
and difficult to turn while changing a tire,
they should be replaced before you check the
tightening torque.
— Replace the flat tire with a new one and have
it installed on your vehicle as soon as possi-
ble. Remount the wheel cover.
Until then, drive with extra care and at reduced
speeds.

ZA WARNING
— If you are going to equip your vehicle with
tires or rims which differ from those which
were factory installed, then be sure to read
the information > page 326.
— Always make sure the damaged wheel or
even a flat tire and the jack* and tool kit are
properly secured in the luggage compart-
ment and are not loose in the passenger
compartment.
—Inan accident or sudden maneuver they
could fly forward, injuring anyone in the ve-
hicle.
— Always store damaged wheel, jack* and
tools securely in the luggage compartment.
Otherwise, in an accident or sudden maneu-
ver they could fly forward, causing injury to
passengers in the vehicle.



Spare tire
General information
Applies to: vehicles with space-saving spare tire (Compact
spare tire)
Fig. 275 Luggage compartment: cargo floor folded up
(versions 1 and 2)

BFV-0231



Fig. 276 Compact spare tire
The spare tire > fig. 276 is intended for short-
term use only. Have the damaged tire checked
and replaced if necessary by an authorized Audi
dealer or authorized Audi Service Facility as soon
as possible.
There are some restrictions on the use of the
compact spare tire. The compact spare tire has
been designed specifically for your type of vehi-
cle. Do not replace it with the spare tire from an-
other type of vehicle. >
357

8V2012721BK
Emergency assistance

> Insert the connector that was removed.
> Applies to: vehicles with subwoofer (version 2):
Slide the lock @ back toward the subwoofer.
> Secure the subwoofer with the bolt.
> Fold the cargo floor cover back into place.
The subwoofer can also be mounted when the
spare tire is not in the spare wheel well.
359

Fuses and bulbs


No. | Equipment No. | Equipment

Clutch sensor, engine start, high-voltage
F49 3
battery, power electronics

F52 F53 Level control system control module


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.
Fuse assignment - Engine compartment

RAZ-0794)
1 0
&
F:}
vi
6
5
4
5}


Fig. 282 Engine compartment: fuse assignment


No. | Equipment
F3 | Engine control module
FA Engine components, engine cooling, aux-
iliary heater, exhaust treatment

Engine components, fuel tank system
(diesel), CNG cut-off valve
Brake light switch
E5

Fo

Engine components, water pumps, tank
F7 ; . ee cae
system (gasoline engine), electrification

F8
F9
Heat oxygen sensor

Engine components, exhaust door, glow
time control module

F10 | Fuel control module, fuel pump

362
F13 | Transmission fluid pump

F15 |Horn

Power and control electronics, engine
components, ignition coil, options mod-
ule
F1l6

Electronic Stabilization Control (ESC), en-
F17
gine control module

Terminal 30 (voltage reference), battery
F18
es
monitoring

FIO F20
F21
Windshield wipers

Anti-theft alarm system

Automatic transmission

Terminal 50 diagnosis, engine control
F22
module

F23 | Engine start

Vacuum pump, water pump, high pres-
F31. 2
sure pump, fuel injectors

F33
F34
F35
F36
F37
Brake pressure reservoir, recuperation

Brake booster

Climate control system

Left front headlamp

Parking heater


F38 | Right front headlamp

Bulbs
Replacing light bulbs
For your safety, we recommend that you have
your authorized Audi dealer replace any bulbs for
you.
It is becoming increasingly more and more diffi-
cult to replace vehicle light bulbs since 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 metal and bulb holders can have sharp
edges that can cause serious cuts, parts must be
correctly taken apart and then properly put back
together to help prevent breakage of parts and >

8V2012721BK
Emergency situations

Loading the vehicle onto a flatbed truck

BaV-0402
|
a


Fig. 289 Vehicle on flatbed truck (example)
Front hook up
> Align the vehicle with the centerline of the car
carrier ramp.
> Attach the winch hook to the front towline eye
previously installed.
Rear hook up
> Align the vehicle with the centerline of the car
carrier ramp.
> Attach the winch hook to the rear towline eye
previously installed.
@) Tips
Check carefully to make sure the hook-up is
secure before moving the car up the flatbed
truck ramp.
Raising the vehicle
Lifting with workshop hoist and with floor
jack
The vehicle may only be lifted at the lifting
points illustrated.
oO S zt 6
> a a


Fig. 290 Front lifting point (example)
= Ss z
ba > i} oO
/


Fig. 291 Rear lifting point (example)
> Read and heed WARNING © A\.
> Locate lifting points > fig. 290 and > fig. 291.
> Adjust lifting arms of workshop hoist or floor
jack to match vehicle lifting points.
> Insert a rubber pad between the floor jack/
workshop hoist and the Lifting points.
If you must lift your vehicle with a floor jack to
work underneath, be sure the vehicle is safely
supported on stands intended for this purpose.
Front lifting point
The lifting point is located on the floor pan rein-
forcement about at the same level as the jack
mounting point > fig. 290. Do not lift the vehi-
cle at the vertical sill reinforcement.
Rear lifting point
The lifting point is located on the vertical rein-
forcement of the lower sill for the on-board jack
> fig. 291.
Lifting with vehicle jack
Refer to > page 354.

Z\ WARNING
—To reduce the risk of serious injury and vehi-
cle damage.
— Always lift the vehicle only at the special
workshop hoist and floor jack lift points il-
lustrated > fig. 290 and > fig. 291.
— Failure to lift the vehicle at these points
could cause the vehicle to tilt or fall from a
lift if there is a change in vehicle weight
distribution and balance. This might hap-
pen, for example, when heavy components |>


369

8V2012721BK
Accessories and technical changes

or write to:
Administrator NHTSA
1200 New Jersey Ave.,
S.E. West Building
Washington, DC
20590.
You can also obtain other infor-
mation about motor vehicle safe-
ty from http://www.safercar.gov.
Applicable to Canada
If you live in Canada and you be-
lieve that your vehicle has a de-
fect that could cause a crash, in-
jury or death, you should immedi-
ately inform Transport Canada,
Defect Investigations and Recalls.
You should also notify Audi Cana-
da.
Canadian customers who wish to
report a safety-related defect to
Transport Canada, Defect Investi-
gations and Recalls, may either
call Transport Canada toll-free at:
Tel.: 1-800-333-0510 or
Tel.: 1-819-994-3328 (Ottawa re-
gion and from other countries)
TTY for hearing impaired:
1-888-675-6863
or contact Transport Canada by
mail at:
Transport Canada
Motor Vehicle Safety Investiga-
tions Laboratory
80 Noel Street
Gatineau, QC
J8Z OA1
For additional road safety infor-
mation, please visit the Road
Safety website at:
English:
http://www.tc.gc.ca/eng/
motorvehiclesafety/menu.htm
French:
http://www.tc.gc.ca/fra/
securiteautomobile/menu.htm
Declaration of
compliance for telecom-
munications equipment
and electronic systems
The manufacturer is not liable for radio malfunc-
tions that are caused by unauthorized changes to
the equipment.
Equipment
The following equipment complies with FCC sec-
tion 15 and RSS-Gen:
— Audi adaptive cruise control*
— Audi side assist*
— Remote control key
— Cell phone package*
— Tire pressure monitoring system*
— WLAN hotspot*
FCC Part 15.19
This device complies with part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any >
377