2021 AUDI E-TRON ECU

Driving


ZA\ WARNING
Other road users may not be able to defini-
tively hear electric vehicles when they are
driving. This increases the risk of an accident
particularly when driving in areas with little
traffic, when maneuvering, or when driving in
reverse.

ient and environmentally-friendly

i}
Your driving style greatly influences the amount
of fuel and energy consumed, the environmental
impact, and the wear on the motor, brakes, and
tires. Note the following information for efficient
and environmentally-conscious driving:
— Select the Audi drive select* efficiency mode.
— Turn off electrical equipment that is not need-
ed, for example seat heating*.
— Anticipate upcoming traffic situations while
driving to avoid unnecessary acceleration and
braking.
— Avoid driving at high speeds.
— Avoid adding extra weight to the vehicle if pos-
sible, for example by not leaving roof racks or
bike racks installed when they are not needed.
— Make sure the tire pressure is correct.
— Have maintenance performed regularly on the
vehicle.
— Do not drive with winter tires during the summ-
er.
— Brake early and evenly to use recuperation.
Messages
B Drive system: malfunction! Safely stop vehi-
cle
There is a malfunction in the drive system. The
vehicle can no longer be driven. Park the vehicle
in a safe location as soon as possible. Secure the
vehicle against rolling before exiting the vehicle
= page 91. See an authorized Audi dealer or au-
thorized Audi Service Facility for assistance.
B Drive system: malfunction! Please contact
Service
96
There is a malfunction in the drive system. Drive
slowly to an authorized Audi dealer or authorized
Audi Service Facility to have the malfunction cor-
rected.
oO Drive system: warning! Limited performance
The driving power is limited. The high-voltage
battery may not be sufficiently charged or is at
the operating temperature threshold, for exam-
ple, when the outside temperatures are extreme-
ly cold.
BS Vehicle sound: malfunction! Pedestrians
cannot hear vehicle. Please contact Service
There is a malfunction in the vehicle sound func-
tion. Drive extremely carefully, since other road
users may not be able to hear your electric vehi-
cle. Drive to an authorized Audi dealer or author-
ized Audi Service Facility immediately to have the
malfunction corrected.
Brakes
ere el eiy
You can apply the vehicle's brakes using the brake
pedal.
Operating noise
Noises may occur when braking depending on the
speed, braking force, and outside conditions such
as temperature and humidity.
When the vehicle is stationary, the brake system
performs system tests at regular intervals. This
can cause brief noise and haptic feedback effects
on the brake pedal.
Braking effect
The response time from the brakes depends on
the weather and environmental conditions. To
ensure the optimal braking effect, the brake sys-
tem is cleaned at regular intervals. This is done
by applying the brake pads to the brake rotors for
a short period of time when driving at high
speeds when the windshield wipers are switched
on.
If the brake system becomes damp, for example
after driving in heavy rain, the braking effect may >

4KE012721BF
Driving

be delayed. Other factors that could temporarily
increase the response time of the brakes include:
— Wet conditions
— Low temperatures, ice, and snow
— Roads covered in salt
— Dirty brake pads
Corrosion
Corrosion may form on the brake rotors if there is
no heavy braking, if the vehicle is not driven for
long periods of time, or if the vehicle is not driv-
en
frequently or for long distances. In this case,
braking heavily several times while driving at
high speeds can clean the brake rotors > A\.
To do this, select the “N” gear so that recupera-
tion is not used for braking.
Brake pads
New brake pads do not achieve their full braking
effect during the first 500 mi (800 km). They
must be “broken in” first. However, you can com-
pensate for the slightly reduced braking force by
pressing firmly on the brake pedal. Avoid heavy
braking during the break-in period.
Because recuperation is also used for braking, the
break-in period for new brake pads is 500 miles
(800 km).
Brake pad wear depends largely on the way the
vehicle is driven and on operating conditions.
Brake pad wear increases when driving frequently
in the city or short distances or when using a very
sporty driving style.
Automatic post-collision braking system
The automatic post-collision braking system can
help to reduce the risk of sliding and of addition-
al collisions after an accident. If the airbag con-
trol module detects a collision, the vehicle is
braked by the ESC.
The vehicle does not brake automatically if one of
the following occurs:
— The driver presses the accelerator pedal, or
—The braking force generated by the pressed
brake pedal is greater than the braking force
that would be initiated by the system
— The ESC, the brake system, or the vehicle elec-
trical system is not functioning

ZA WARNING
— Only apply the brakes for the purpose of
cleaning the brake system when road and
traffic conditions permit. You must not en-
danger other road users and increase the
risk of an accident.
— Due to the risk of injury, only have an au-
thorized Audi dealer or authorized Audi
Service Facility work on the brake system.
Incorrect repairs could impair the function.
— Never let the vehicle roll while the drive sys-
tem is switched off because this increases
the risk of an accident.
— During automatic braking maneuvers, the
brake pedal may move downward automati-
cally. To reduce the risk of injury, do not
place your foot under the brake pedal.
CG) Note
— Never let the brakes “rub” by pressing the
pedal lightly when braking is not actually
necessary. This can cause the brakes to over-
heat and increases braking distance and
causes wear.
— Observe the important information for driv-
ing downhill > page 100. This especially ap-
plies when towing a trailer.
@ Tips
— If you retrofit your vehicle with a front spoil-
er, wheel covers or similar items, make sure
that the air flow to the brakes is not ob-
structed. Otherwise the brake system can
overheat.

— Also refer to the information about brake
fluid > page 236.
We Te(4
EG / @ Brakes: malfunction! Safely stop ve-
hicle
There is a malfunction in the brake system. If
BS / Gana B also turn on, there is a malfunc-
tion in the ABS, ESC, and braking distribution. If >
97

Driving

the brake booster is not working, you have to use
much more force when braking the vehicle.
Do not continue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance. Read and follow the other safety pre-
cautions > A\.
Ga / @ Brake pads: wear limit reached. You
can continue driving. Please contact Service
The brake pads are worn. Drive to an authorized
Audi dealer or authorized Audi Service Facility as
soon as possible to have the malfunction correct-
ed.
Brake booster: limited functionality. You can
continue driving. Please contact Service
There is a brake booster malfunction. The brake
booster is available, but its effectiveness is re-
duced. The braking performance may be different
compared to the usual performance. Drive to an
authorized Audi dealer or authorized Audi Service
Facility immediately to have the malfunction cor-
rected.
Other indicator lights
When you switch the ignition on, the BRING / @)
indicator light turns on briefly to check the func-
tion. If the indicator light does not turn on, there
is a system malfunction.
1f RG / @ stays on, there is a malfunction in
the brake system.
- Ahigh load was placed on the brakes from
driving downhill for a long period of time. Follow
the instructions in the message to utilize the en-
gine braking effect and to relieve the brakes.

Z\ WARNING
If a malfunction occurs in the ABS, ESC, and
braking distribution, interventions that stabi-
lize the vehicle will no longer be available.
This could cause the vehicle to swerve, which
increases the risk that the vehicle will slide.
Do not continue driving. See an authorized
Audi dealer or authorized Audi Service Facility

for assistance.

98
Electromechanical
parking brake
Operating the parking brake
The electromechanical parking brake is used to
secure the vehicle from rolling away unintention-
ally.
The @) switch is located under the selector lever
in the center console. It turns on when the park-
ing brake is set. You can release the parking brake
manually or automatically when you start to
drive.
Setting and releasing the parking brake
> Setting: pull the ©) switch.
> 1f i ii ® appears, the parking brake is hold-
ing the vehicle. You can remove your foot from
the brake pedal.
> Releasing: when the ignition is switched on,
press and hold the brake pedal and press the
button.
If the red indicator light flashes, the braking
force has not built up enough or it has decreased.
You can also secure the vehicle by selecting the
“P” gear or pressing the brake pedal. Make sure
the indicator light is off before you start driving.
Automatically releasing the parking brake
when starting to drive
Requirement: the driver's door must be closed
and the driver’s safety belt must be fastened.
> Press the accelerator pedal to start to drive.

ZA WARNING
—To reduce the risk of an accident, always
make sure the vehicle is situated safely
while stationary.
— If the parking brake is set, it can release au-
tomatically when the accelerator pedal is
pressed. To reduce the risk of an accident,
do not inadvertently press the accelerator
pedal and always shift into “P” when the ve-
hicle is stopped.
— If the power supply fails, you cannot set the
parking brake once it is released, or release
it if it is set. Secure the vehicle against >

4KE012721BF
Driving


rolling before exiting the vehicle > page 91.
See an authorized Audi dealer or authorized
Audi Service Facility for assistance.

G) Tips
— On steep inclines, especially when in trailer
mode, the vehicle may roll backwards unin-
tentionally when starting to drive. To reduce
the risk of this happening, pull and hold the
switch while pressing the accelerator
pedal. If enough drive power has built up at
the wheels and the vehicle does not roll
backwards, then release the switch to start
to drive.
— If you leave the vehicle when “D” or “R” are
engaged, the parking brake will be set auto-
matically.
— Noises when the parking brake is set and re-
leased are normal and are not a cause for
concern.
— The parking brake goes through a self-test
cycle at regular intervals when the vehicle is
stopped. Any noises associated with this are
normal.
atl Cei- ty
Applies to: vehicles with hold assist
If the vehicle is stopping frequently, the system
can assist the driver in a comfortable transition
when starting to drive from a stop, for example,
at a red light, ona hill, or in stop-and-go traffic.
Switching the hold assist on and off
You can switch the hold assist on and off in the
MMI.
> Applies to: MMI: Select on the home screen:
VEHICLE > Settings & Service > Hold assist.
Starting to drive with hold assist
Requirement: the driver's door must be closed
and the drive system must be active.
> Press and hold the brake pedal for several sec-
onds while the vehicle is stationary.
> r@ appears, the hold assist is holding the ve-
hicle. You can remove your foot from the brake
pedal.
> Press the accelerator pedal to start to drive.
In certain situations, the hold assist may transfer
the function of holding the vehicle to the parking
brake.
Depending on the equipment, hold assist may be
switched off when in “R” gear to help improve
maneuverability. If this is the case, press the
brake pedal to secure the vehicle.

Z\ WARNING
—The hold assist cannot hold the vehicle on
inclines in every scenario (for example, on
slippery or icy ground). Be ready to apply the
brakes at all times when using the hold as-
sist.
—To reduce the risk of an accident, always
make sure the vehicle is situated safely
while stationary.
® Note
Switch hold assist off before driving your vehi-
cle into a car wash with a conveyor belt. Oth-
erwise, the parking brake could engage auto-
matically.
CALA mi ad(ela)
Emergency braking should only be used in an
emergency, if the standard brake pedal is mal-
functioning or obstructed. When the emergency
braking function is activated, the braking effect is
similar to a heavy braking maneuver.

> Pull and hold the ©) switch while driving.
> An audio warning signal will sound and emer-
gency
braking will begin.
> If you press the accelerator pedal, emergency
braking will be canceled.

Z\ WARNING
Heavy braking while driving through curves or
in poor road or weather conditions can cause
the vehicle to slide or the rear of the vehicle to
swerve, which increases the risk of an acci-

dent.

99

Driving

Messages
Gg / © Parking brake: malfunction! Safely
stop vehicle. See owner's manual
BRAKES @ Parking brake: malfunction! Please
release parking brake
If one of the two messages appears, there is a
malfunction in the parking brake. If the message
appears while stationary, check if the parking
brake is released and can be reset. If this is the
case,
switch the ignition off and back on.
If the message stays on, if the parking brake can-
not be released, or if the message appears while
driving, do not continue driving. Secure the vehi-
cle against rolling before exiting the vehicle
= page 91. See an authorized Audi dealer or au-
thorized Audi Service Facility for assistance.
we Parking brake: malfunction! Please contact
Service
There is a malfunction in the parking brake. Drive
to an authorized Audi dealer or authorized Audi
Service Facility immediately to have the malfunc-
tion corrected. Do not park the vehicle on inclines
and shift to “P”.
Ba / Parking brake: warning! Vehicle parked
too steep
The braking force may not be enough to secure
the vehicle from rolling away. Park the vehicle in
a place with less of an incline.
Ea / {Q) Parking brake: applied
The parking brake is set. Press and hold the brake
pedal to release the parking brake.
Take over!
The vehicle cannot be held in place automatically.
Press the brake pedal to secure the vehicle from
rolling away unintentionally.
Special driving situations
PTTL MY ale lace me (Muni Ge
When driving uphill, downhill, or at high alti-
tudes, note the following information:
— Drive slowly and carefully.
100
— Do not try to turn around if you cannot safely
drive on an incline or hill. Instead, drive in re-
verse.
— When driving down hills, use the recuperation
braking effect > page 94. This reduces the load
on the brakes.
— Use the hold assist if necessary > page 99
— Use the hill descent assist if necessary
=> page 101

A WARNING
— Only drive on inclines that your vehicle is de-
signed to handle. Do not exceed the hill
climbing ability of your vehicle. Your vehicle
could tip or slide.
— Do not drive at an angle on steep inclines
and hills. If your vehicle is about to tip, you
must immediately start steering in the di-
rection of the downward slope to reduce the
risk of an accident.
— Always be ready to brake when using the hill
descent control function.
ier NLA)
Your vehicle is not an offroad vehicle. Note the
following points when driving offroad:


— Drive slowly and carefully.
—To reduce the risk of underbody damage, pay
attention to the vehicle's ground clearance and
drive across raised areas of the ground with the
wheels on one side of the vehicle, instead of al-
lowing the center of the vehicle to pass over the
raised areas.
—To reduce the risk of becoming stuck, drive
through sandy or swampy areas at a steady
speed and without stopping, if possible.
If necessary, use the following functions:
— Audi drive select* offroad mode > page 102
— Hill hold assist* > page 101
— Raising the vehicle > page 103
— Limit ESC > page 106

ZX WARNING
Only drive in terrain that is suitable for the ve-
hicle and your driving ability. >

4KE012721BF
Driving dynamic

Suspension
CET tes un) Led
Applies to: vehicles with suspension control
The adaptive dampers are an electronically-con-
trolled damping system. The firmness of the sus-
pension will adapt to the driving conditions and
the driving situation. The settings depend on the
selected Audi drive select* mode.
Air suspension
Applies to: vehicles with air suspension
The air suspension is an electronically-controlled
suspension and leveling system. The firmness of
the suspension will adapt to the driving condi-
tions and the driving situation. The system balan-
ces out changes in load. The vehicle level will also
adapt gradually to the vehicle speed in order to
reduce the wind resistance at high speeds and in-
crease the ground clearance at low speeds. The
settings depend on the selected Audi drive se-
lect* mode.
Displaying the vehicle level
> Applies to MMI: Select on the home screen: VE-
HICLE > Audi drive select.
The filled-in boxes represent the current vehicle
level. The more boxes that are filled in, the high-
er the ground clearance. The box that corre-
sponds with the current vehicle level will flash
while the vehicle is lifting or lowering. The target
level is highlighted in color.
Raising the vehicle
> Applies to MMI: Select on the home screen: VE-
HICLE > Audi drive select.
> Press Raise to reach the highest vehicle level
and thus the maximum ground clearance.
> Press Lower to lower the vehicle down again.
The Audi drive select* mode will be changed if
necessary when the vehicle is raised.
The vehicle will lower at speeds of approximately
22 mph (35 km/h) and below. This function may
only be used temporarily when increased ground
clearance is necessary. It is not intended for long
drives.
CG) Note
—Also refer to the information about ground
clearance > page 103.
— When transporting the vehicle on a road
carrier, rail carrier, ship carrier, or other car-
rier, it may only be secured at the running
surfaces of the tires (circumference). Secur-
ing the vehicle at the axle components, sus-
pension struts, or towing eyes is not permit-
ted because the pressure in the air suspen-
sion struts can change during transport. The
vehicle might not be secured sufficiently if
this happens.
Ground clearance
The vehicle height and clearance can be influ-
enced by the following factors:
— Change in temperature
— Change in load
— Change to the Audi drive select* mode
— Lifting and lowering via the air suspension*

ZA WARNING
To reduce the risk of injury, make sure no one
gets pinched when the vehicle level is chang-
ing, for example when cleaning the under-
body or the wheel housings.
CG) Note
Always make sure there is enough clearance
above and below the vehicle. This is especially
important for entrances with height restric-
tions, for example, before driving into under-
ground garages. You could also scrape the
ground when driving over the edges of curbs
or on steep ramps, which could damage your
vehicle.
B Air suspension: malfunction! You may con-
tinue driving slowly at max. XX mph (km/h)

103
>

Driving dynamic

There is a malfunction. Driving stability may be
limited. Drive to an authorized Audi dealer or au-
thorized Audi Service Facility immediately. Do not
drive
faster than the speed given in the message.
B Air suspension: malfunction! You can contin-
ue driving. Speed limited to max. XXX
There is a malfunction. Driving stability may be
limited. Drive to an authorized Audi dealer or au-
thorized Audi Service Facility immediately. The
maximum speed has been limited.
B Air suspension: malfunction! Safely stop ve-
hicle.
Steering and ground clearance limited
There is a malfunction. Do not continue driving.
Secure the vehicle against rolling before exiting
the vehicle > page 91. Avoid turning the steering
wheel, because the vehicle ground clearance may
be so low that turning the steering wheel could
result in damage to the wheels and wheel hous-
ings.
i Suspension: malfunction! You can continue
driving
There is a malfunction. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance.
B Air suspension: vehicle too low. Limited
ground clearance
The vehicle ground clearance is very low. Wait un-
til the air suspension system has restored normal
ground clearance. Have an authorized Audi dealer
or authorized Audi Service Facility repair the mal-
function immediately if the indicator light does
not turn off after a significant period of time.
B Air suspension: malfunction! Please contact
Service
There is a malfunction. The driving stability may
be limited and the ground clearance may be low.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance.
Audi drive select: automatic suspension low-
ering. See owner's manual
The vehicle level is adjusted to the setting stored
for the active personal profile > page 29.
104
Audi drive select: automatic suspension Lift.
See owner's manual
The vehicle level is adjusted to the setting stored
for the active personal profile > page 29.
Steering
Electromechanical steering supports the driver's
steering movements by electronically adapting
the power steering depending on the vehicle
speed. The settings depend on the selected Audi
drive select* mode.
Messages
1} Steering: malfunction! Please stop vehicle
The power steering may have failed. Adapt your
driving style immediately to compensate for the
fact that it may be more difficult to turn the
steering wheel, and stop your vehicle in a safe lo-
cation as soon as possible. Do not continue driv-
ing. See an authorized Audi dealer or authorized
Audi Service Facility for assistance.
| —e| Steering: malfunction! Please stop vehicle
There is a malfunction in the electronic steering
lock. You cannot turn the ignition on. Secure the
vehicle against rolling before exiting the vehicle
= page 91. Do not tow your vehicle because it
cannot be steered. See an authorized Audi dealer
or authorized Audi Service Facility for assistance.
a Steering: malfunction! You can continue
driving
There is a malfunction in the steering system.
Steering may be more difficult or more sensitive.
Adapt your driving style. Have the steering sys-
tem checked immediately by an authorized Audi
dealer or authorized Audi Service Facility. Please
note that the red indicator light may turn on af-
ter restarting the drive system. Do not continue
driving if it does.
|@—e| Steering lock: malfunction! Please contact
Service
There is a malfunction in the electronic steering
lock. Drive immediately to an authorized Audi >

4KE012721BF
High-voltage system



— Monitor the Audi charging system if it is be-
ing used near children.
— Installation and setup of the household con-
nection for Audi charging systems may only
be performed by a qualified electrician. The
qualified electrician is thereby responsible
for adhering to applicable standards and
regulations.
— Make sure that the household socket is
grounded and shielded from water.
— If Audi charging systems do not function ac-
cording to the specifications in the operat-
ing manual, they must not be used. Contact
an authorized Audi dealer or authorized
Audi Service Facility.
— Audi charging systems are intended for use
in private and semi-private areas (for exam-
ple, private property and company parking
lots). Depending on the country where the
vehicle is operated, charging with a mode 2
charging cable (meaning charging with the
Audi charging system) may be prohibited in
public areas. Contact an authorized Audi
dealer or authorized Audi Service Facility for
more information.
— Operate the Audi charging systems in power
networks that are properly grounded. It can-
not be used with non-grounded power net-
works (such as IT networks).
— When charging the high-voltage battery us-
ing household/industrial sockets, the elec-
trical installation can be used at full capaci-
ty. Audi recommends having a qualified elec-
trician regularly inspect the electrical instal-
lations that are used for charging.
— If possible, disconnect Audi charging sys-
tems from the power network during a
thunderstorm.
— Never submerge the Audi charging systems
or the connectors in water.
— Audi charging systems must only be cleaned
when the control unit is completely discon-
nected from the power supply and from the
vehicle. Use a dry towel to clean.
— Audi charging systems are only intended for
use on Audi vehicles and vehicles within the
Volkswagen Group. Using the devices on

vehicles made by another manufacturer is

not authorized.


() Note
— If the vehicle is not being used for long peri-
ods of time, the high-voltage battery must
be charged after four months at the latest
or the vehicle must be continuously con-
nected to a power source (for 50% charging
target > page 115). Otherwise, the high-
voltage battery could become damaged.
— Make sure that you always use the correct
charging equipment for the country in
which it is being used. Contact an author-
ized Audi dealer or authorized Audi Service
Facility for more information.
— On vehicles with only one charging port,
there is a cover on the opposite side of the
vehicle with no charging components instal-
led underneath it. Do not try to open this
cover.
G@) Tips
— Your vehicle can only be charged at charging
stations that meet the requirements in the
respective country and meet the following
standards, at a minimum:
— GB/T 18487.1 and GB/T 20234 (China)
— IEC 61851 and IEC 62196 (Europe)
— SAE J1772 (North America, Japan)
— You can use your Audi charging system if
there is a household or industrial connec-
tion available at the charging station.
(i) Tips
Applies to: Audi charging systems
— For an uninterrupted charging process, Audi
recommends only charging using sockets
that are connected to a separately protected
circuit.
— Audi recommends using Audi charging sys-
tems in the wall mount clip* during opera-
tion. If this is not possible, always position
Audi charging systems on a secure surface
during the charging process > A.
—To reduce the risk of overheating during op-
eration, do not place Audi charging systems
111
>