2021 AUDI Q2 alternator

Instruments and controls

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Central warning/indicator Lamp

•=>
page 26,
Audi pre sense*

\^>page
121
Brake system
/
^>page
29

ELectro-mechanical
parking brake

Pipage
30
| Cooling system

>page30
ngine
oil pressure

>page
31
Alternator

opage
31
| Seat belt

^>page
31,
^>page
31
Electro-mechanical power steering

1/

*$page
148
Steering lock

^>page
32
Engine stopped while vehicle is
I moving

^>page
32

Learbox

>page 92
Bonnet

^page
33
Adaptive cruise control*

cépage
113
Emergency assist*

•=>poge
126
AdBlue*

^>page
292
AdBlue*

^>page
292
Yellow indicator lamps

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Central warning/indicator lamp

^>
page 26,
Brake servo*

^>
page 29
Electronic stabilisation control
(ESC)
•
^>page
33
Electronic stabilisation control
(ESC)
•
^>page
33
Electronic stabilisation control
(ESC)

^>page
145
Anti-lock brake system (ABS)
•/
^>page
33
Safety systems
/
<>page 31

Brake pads

<=>page
33
Electro-mechanical parking brake

•=>page
30
Hill hold assist

<=s>page
33
Tyre
pressure*

*$page
309
Tyre pressure*

^>page
309
Engine management*

^>page
33
Engine management*

^>page
33
Engine management*

tapage
33
Emission control system
/
<=>page
33
Diesel particulate
filter*

^>page
34
Engine speed governing*

Opcrge
34
Engine oil level
(MIN)
^>page
34
Engine oil sensor

^>page
34
Engine warm-up
requested*

opage
34
Battery charge

^>page
31
27

Instruments and controls
© CAUTION

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Do not drive on if the warning lamp || lights

up;
otherwise there is a risk of engine dam­

age.

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Engine oil pressure
| Switch off engine! Oil pressure too low
Switch off the engine and do not drive on. Check
the engine oil level
^>page
298.
- If the engine oil level is too low, add more oil

tapage
297. Do not drive on until the warning
lamp has gone out.
-If the engine oil level is OK
but
the warning
lamp still lights up, switch off the engine and
do not drive on. Obtain professional assistance.
© Note
The oil pressure warning lamp is not an
indi­

cator for the oil level. The oil level should
therefore be checked regularly.

C3
Alternator/vehicle battery
| Electrical system: fault. Battery is not being
charged
There is an alternator fault or a fault in the
vehi­

cle's electrical system.
Drive to a qualified workshop without delay.
However, you should avoid using electrical equip­
ment that is not absolutely necessary because
this will drain the battery. If the battery charge is
insufficient, obtain professional assistance.

S
Electrical system: fault. Please contact
workshop
Drive to a qualified workshop without delay.
Avoid using electrical equipment that is not abso­
lutely necessary (such as the radio) because this
will drain the battery. If the battery charge is in­
sufficient, obtain professional assistance.

y
Electrical system: low battery charge. Bat­
tery will be charged while driving
Starting reliability may be impaired.
If this message disappears after a while, the ve­
hicle battery will have been sufficiently charged
while driving.
If the message does not disappear again, drive to
a qualified workshop without delay and have the
fault rectified.

2f
Safety systems
The indicator lamp

terns.

monitors the safety sys-

If
the indicator lamp
Ej
lights up or flashes,
there is a malfunction in one of the safety sys­

tems.

Drive to a qualified workshop without delay and
have the fault rectified.

A
WARNING
Have the safety systems examined without
delay; otherwise they may fail to trigger in an
accident - this could result in serious or possi­
bly fatal injury.

A
Front seat belt
The warning lamp|| lights up and does not go
out until the driver's and front passenger's* seat
belts have been fastened. When the vehicle has
gathered speed you will also hear a warning

chime.

Note
For further information on the seat belts

•=>
page 275.

y/4
Rear seat belt
Applies to: vehicles with seat belt warning system (rear seats)
If a rear seat belt is buckled/unbuckled, the cor­
responding indicator Lamp Lights up briefly.

||
- If the indicator lamp lights up briefly, the
corresponding rear seat is not occupied.

|/RI|-
If the indicator lamp lights up briefly,
the rear seat belt has been fastened.
| /
KJ
"
Ifthe
warning lamp flashes, the seat
belt has been unbuckled with the vehicle moving.
31

Driving
instance when you can see that the next traffic
lights are red. This takes advantage of the engine
braking effect, reducing wear on the brakes and

tyres.
Emissions and fuel consumption will drop
to zero due to the overrun fuel cut-off.
Change gear early to save fuel
An effective way of saving fuel is to change up
quickly through the gears. Running the engine at
high rpm in the lower gears uses an unnecessary
amount of
fuel.

Applies to: vehicles with manual gearbox
Shift up to second gear as soon as possible. If
possible, we recommend shifting up to the next
gear at approx. 2,000 rpm.
Applies to: vehicles with automatic gearbox
Press the accelerator slowly and avoid using the

"kick-down"
feature.
Avoid driving at high speed
Avoid travelling at top speed. Fuel consumption,
exhaust emissions and noise Levels all increase
very rapidly at higher speeds. Driving at moder­
ate speeds will help to save
fuel.

Do not let the engine idle for longer than
necessary
Engine idling periods are automatically reduced
on vehicles with start/stop system*. On vehicles
without a start/stop system, it is worthwhile
switching off the engine at level crossings, for in­
stance, or at traffic lights with a long red phase.
The fuel saved after about 5 seconds can be
greater than the amount of fuel needed to re­
start a warm engine (the exact fuel saving de­
pends on the engine version).
The engine takes a very long time to warm up
when it is running at idling speed. Mechanical
wear and pollutant emissions are also especially
high during this initial warm-up phase. It is
therefore best to drive off immediately after
starting the engine. Avoid running the engine at
high speed.

o
Regular servicing
Regular servicing can establish a basis for good

iS
fuel economy before you start driving. A
well-

serviced engine gives you the benefit of im­
proved fuel efficiency as well as maximum relia­
bility and an enhanced resale value. A poorly
maintained engine can consume up to ten per­
cent more fuel than necessary.
Avoid short trips
The engine and emission control system need to
reach their proper working temperature in order
to minimise fuel consumption and emissions.
A cold engine uses disproportionately more
fuel.

The engine only reaches its working temperature
after about four kilometres, when fuel consump­
tion will return to a normal level.
Check tyre pressures
Always make sure the tyres are inflated to the
correct pressures
•=>page
306 to save
fuel.
If the
tyre pressures
are
just 0.5
bar
too Low, this can
increase the fuel consumption by as much as 5
%. Due to the greater rolling resistance, under-
inflation also increases tyre wear and impairs

handling.

Do not use winter tyres all through the year; they
will increase fuel consumption by up to 10 %.
Avoid carrying unnecessary loads
Every kilo of extra weight will increase the fuel
consumption, so it is worth checking the Luggage
compartment occasionally to make sure that no
unnecessary loads are being transported.
The roof carrier increases the air resistance of the
vehicle and should be removed when not in use.
This will save about 12 % of fuel at speeds of be­
tween 60 and 75
mph.

Save electrical energy
The engine drives the alternator to generate elec­
tricity. This means that fuel consumption rises
when more power is required for electrical equip­
ment. Switch off electrical equipment when it is
not needed. Electrical equipment which uses a
lot of electricity includes the blower (at a high
setting), the rear window heating and the seat

heating*.

73

Intelligent technology
Dynamic power management
While the vehicle is moving, this function distrib­
utes the available power to the various electrical
components and systems according to their re­
quirements. It ensures that on-board systems do
not consume more electrical power than is being

generated,
and thus maintains the maximum
possible vehicle battery power level.
® Note
- The power management system is not able
to overcome the given physical limits.
Please remember that the power and life of
the vehicle battery are limited.
- If the indicator lamp
|3 ^page
31 appears,
the starting ability may be impaired.
Starting ability has first priority.
Short trips, city traffic and low temperatures all
place a heavy load on the vehicLe battery. In
these conditions a large amount of power is
con­

sumed,
but only
a
small amount is supplied. The
situation is also critical if electrical equipment is
in use when the engine is not running. In this
case power is consumed when none is being
gen­

erated.

In these situations you will be aware that the
power management system is intervening to
con­

trol the distribution of electrical power.
When the vehicle is parked for long periods
If
you
do not drive your vehicle for a period of
several days or weeks, the power management
will gradually shut off the on-board systems one
by one, or reduce the amount of current they are

using.
This limits the amount of power consumed
and helps to ensure reliable starting even after a
long period. Certain convenience features, such
as remote controL unlocking, may not be availa­

ble.
These functions will be restored when you
switch on the ignition and start the engine.
150
With the engine switched off
If
you
listen to the radio or use the other info­
tainment functions when the engine is not
run­

ning,
this will discharge the vehicle battery.
The infotainment display will show a warning
message before the battery power drops to a Lev­
el where the starting ability is impaired. This
message warns you that the system you are using
will soon be switched off automatically. You
should therefore start the engine if
you
wish to
continue using the system.
When the engine is running
Although the alternator generates electrical
power, the vehicle battery can still become dis­
charged while the vehicle is being driven. This can
occur when a lot of power is being consumed but
only
a
small amount supplied, especially if the
vehicle battery is not fully charged initially.
To restore the necessary energy balance, the sys­
tem
will
then temporarily shut off the electrical
components that are using a lot of power, or re­
duce the current they are consuming. Heating
systems in particular use a Large amount of elec­
trical power. If
you
notice, for instance, that the
seat heating* or the rear window heater is not

working,
they may have been temporarily switch­
ed off or regulated to a lower heat output. These
systems will be available again as soon as
suffi­

cient electrical power is available.
You may also notice that the engine runs at a
slightly faster idling speed. This is quite normal,
and no cause for concern. The increased idling
speed allows the alternator to meet the greater
power requirement and charge the vehicLe bat­
tery at the same time.
Information saved in the
control units
The vehicle is fitted in the factory with electronic
control units that, among other things, control
the engine and the gearbox. The controL units al­
so monitor the exhaust system and the airbags.
The control units continually analyse data rele­
vant to the vehicLe while you are driving. In the •

Checking and topping up fluids
- Never remove the engine cover panel - risk
of burns!
- If any tests have to be performed with the
engine running, there is an extra safety risk
from the rotating parts, such as the drive

belts,
alternator and radiator
fan,
etc., and
from the high-voltage ignition system.
- Never touch the radiator fan. The electric
additional fan is controlled by temperature
and can start running without warning.
- Applies to vehicles with automatic gearbox:
Never open the throttle inadvertently (for
instance by hand from the engine compart­
ment) if
a
gear is engaged while the vehicle
is stationary with the engine running. The
vehicle will otherwise start moving immedi­
ately and could cause an accident.
- Observe the following additional warnings if
work on the fuel system or the electrical
system is necessary:
- Do not smoke.
- Never work near naked flames.
- Always keep an approved fire extinguisher
immediately available.
- Any work on the batteries and electrical sys­
tem in your vehicle entails a risk of injury
and chemical burns in addition to danger of
accident or fire.
For
this reason, you must
have the work carried out by
a
qualified
workshop.
© CAUTION
When topping up fluids make sure the correct
fluid is put into the correct filler opening. This
can otherwise cause serious malfunctions or
engine damage.
® For the sake of the environment
Inspect the ground underneath your vehicle
regularly so that any Leaks are detected at an
early stage. If
you
find spots of oil or other

fluids,
have your vehicle inspected in the
workshop.
© Note
located on the other side of the engine com­
partment.
Opening/closing the bonnet

The
bonnet is released from inside the vehicle.

Fig.
243 Detail of footwell on driver's side: Release lever

I

On right-hand drive vehicles* some of the
containers / reservoirs mentioned below are

Fig.
244 Unlocked bonnet: Lever
The wiper arms should be resting on the
wind­

screen:
make sure they are not in a raised
posi­

tion.
Otherwise the paint may get damaged.
Opening the bonnet

•
With the driver's door open, pull the lever un­
der the dashboard in the direction indicated
(arrow)
^>Fig.
243.

*•
Lift the bonnet slightly
•=> A-
•
Press the Lever under the bonnet in the direc­
tion indicated by the arrow
^>Fig.
244. This will
release the arrester hooks.

•
Open the bonnet.
Closing the bonnet
• To close the bonnet, pull it down to overcome
the spring pressure.

•
Then let it drop into the catches; do not press
down
|=>^.
•
296