audio CITROEN C4 AIRCROSS DAG 2021 Handbook (in English)

109
Driving
6

This system:– warns the driver that their vehicle is at risk of collision with the vehicle in front or a pedestrian.– reduces the vehicle's speed to avoid a collision or limit its severity.
This system is comprised of three functions:
– Collision Risk Alert.
– Intelligent emergency braking assistance.– Active Safety Brake (automatic emergency braking).

The vehicle has a camera located at the top of
the windscreen.
This system does not avoid the need for
vigilance on the part of the driver.
This system is designed to assist the driver
and improve road safety.
It is the driver's responsibility to continuously
monitor the state of the traffic, observing the
driving regulations.
As soon as the system detects a potential obstacle, it prepares the braking
circuit in case automatic braking is needed.
This may cause a slight noise and a slight
sensation of deceleration.
Deactivation / Activation
By default, the system is automatically activated
at every engine start-up.
The system can be deactivated or activated via
the vehicle settings menu.
Deactivation of the system is signalled by the illumination of this indicator lamp,
accompanied by the display of a message.
Without audio system
► In the "DRIVE ASSIST" menu on the
instrument panel display, activate/deactivate
"COLLISION ALT" (Automatic emergency
braking).
With audio system
► In the "Personalisation-
configuration " menu, activate/deactivate
"Auto. emergency braking".
With touch screen
► In the Driving / Vehicle menu, select
the "Vehicle settings" tab, then
"Security" and activate/deactivate " Automatic
emergency braking".
Operating conditions and
limits
ESC system in working order.
ASR system activated.
Seat belts fastened for all passengers.
Stabilised speed on unwinding roads.
In the following cases, deactivating the system
via the vehicle's configuration menu is advised:
– Towing a trailer.– Carrying long objects on roof bars.– Vehicles with snow chains fitted.– Before using an automatic car wash, with the engine running.– Before placing the vehicle on a rolling road in a workshop.– Towed vehicle, engine running.– When a "space-saver" type spare wheel is fitted (depending on version).– If the brake lamps are not working.– Following impact to the windscreen close to the detection camera.
It is possible that warnings are not given,
are given too late or seem unjustified.
The driver must always stay in control of the
vehicle and be prepared to react at any time
to avoid an accident.
After an impact, the function automatically stops operating. Contact a
CITROËN dealer or a qualified workshop to
have the system checked.

11 0
Driving
Collision Risk Alert
This function warns the driver that their vehicle
is at risk of a collision with the vehicle in front or
with a pedestrian present in their traffic lane.
Operation
Depending on the degree of risk of collision
detected by the system and the alert trigger
threshold chosen by the driver, several different
levels of alert may be triggered and displayed in
the instrument panel or on the head-up display.
The system takes account of the vehicle
dynamics, the speed of your vehicle and the one
in front, the environmental conditions and the
operation of the vehicle (actions on the pedals,
the steering wheel, etc.) to trigger the alert at the
best moment.
Level 1 (orange): visual alert only,
indicating that the vehicle in front is very
close.
The message "Vehicle close" is displayed.Level 2 (red): visual and audible alert,
indicating that a collision is imminent.
The message "Brake! " is displayed.
Level 3: in some cases, a vibration alert in the
form of micro-braking can be given, confirming
the risk of collision.
Where the speed of your vehicle is too
high approaching another vehicle, the
first level of alert may not be displayed: the
level 2 alert may be displayed directly.
Important: the level 1 alert is not displayed
when there is a stationary obstacle or when
the "Close" trigger threshold has been
selected.
Modifying the alert trigger threshold
This trigger threshold determines the sensitivity
with which the function warns of the risk of
collision.
► Select one of the three pre-defined thresholds:– "Distant".– “Normal".– “Close".
The last threshold selected is memorised when
the ignition is switched off.
Without audio system
► In the "DRIVE ASSIST" menu on the
instrument panel display, activate/deactivate
"COLLISION ALT" (Automatic emergency
braking).
► Then change the alert threshold.
With audio system
► In the "Personalisation-
configuration " menu, activate/deactivate
"Auto. emergency braking".
► Then change the alert threshold.
With touch screen
► In the Driving / Vehicle menu, select
the "Vehicle settings" tab, then
"Security" and activate/deactivate " Collision
risk and auto. braking ".
► Then change the alert threshold.► Press "Confirm" to save the change.
Intelligent emergency
braking assistance
If the driver brakes, but not sufficiently to avoid a
collision, this system will supplement the braking,
within the limits of the laws of physics.
This assistance will only be provided if the driver
presses the brake pedal.
Active Safety Brake

This function, also called automatic emergency
braking, intervenes following the alerts if the
driver does not react quickly enough and does
not operate the vehicle's brakes.
It aims to reduce the speed of impact or avoid a
collision where the driver fails to react.
Operation
The system operates under the following
conditions:
– The vehicle's speed does not exceed 37 mph (60 km/h) when a pedestrian is detected.
– The vehicle's speed does not exceed 50 mph (80 km/h) when a stationary vehicle is detected.

111
Driving
6Active Safety Brake

This function, also called automatic emergency
braking, intervenes following the alerts if the
driver does not react quickly enough and does
not operate the vehicle's brakes.
It aims to reduce the speed of impact or avoid a
collision where the driver fails to react.
Operation
The system operates under the following
conditions:
– The vehicle's speed does not exceed 37 mph (60 km/h) when a pedestrian is detected.
– The vehicle's speed does not exceed 50 mph (80 km/h) when a stationary vehicle is detected.
– The vehicle's speed is between 6 mph and 53 mph (10 km/h and 85 km/h) when a moving vehicle is detected.This warning lamp flashes (for approximately 10 seconds) as soon as
the function acts on the vehicle’s braking.
With an automatic gearbox, in the event of
automatic emergency braking until the vehicle
comes to a complete stop, keep the brake
pedal pressed down to prevent the vehicle from
starting off again.
With a manual gearbox, in the event of automatic
emergency braking until the vehicle comes to a
complete stop, the engine may stall.
The driver can maintain control of the vehicle at any time by sharply turning the
steering wheel and/or sharply pressing the
accelerator pedal.
Operation of the function may be felt by
slight vibration in the brake pedal.
If the vehicle comes to a complete stop, the
automatic braking is maintained for 1 to 2
seconds.
Malfunction
In the event of a fault with the system, you are alerted by the fixed illumination of this
warning lamp, accompanied by the display of a
message and an audible signal.
Contact a CITROËN dealer or a qualified
workshop to have the system checked.
Distraction detection
Refer to the General recommendations on the
use of driving and manoeuvring aids .
Take a break in case of feeling tired or at least
every 2 hours.
Depending on version, the function consists of
just the "Coffee Break Alert" system, or of this
combined with the "Driver Attention Warning"
system.
These systems are in no way designed to keep the driver awake or to prevent
the driver from falling asleep at the wheel.
It is the driver’s responsibility to stop if feeling
tired.
Activation/Deactivation
The system is activated or deactivated via the
vehicle configuration menu.
Without audio system
► In the "DRIVE ASSIST" menu on the
instrument panel display, activate/deactivate
"VIGILANCE ALT " (Fatigue Detection System).
With audio system
► In the "Personalisation-
configuration " menu, activate/deactivate
"Fatigue Detection System".

11 5
Driving
6Using sensors located in the bumper, this
system signals the proximity of obstacles
(e.g. pedestrian, vehicle, tree, barrier) present in their field of detection.
Rear parking sensors
The system is switched on by engaging reverse
gear, which is confirmed by an audible signal.
The system is switched off when disengaging
reverse gear.
Audible assistance

The system signals the presence of obstacles
within the sensors’ detection zone.
The proximity information is given by an
intermittent audible signal, the frequency of
which increases as the vehicle approaches the
obstacle.
When the distance between the vehicle and
the obstacle becomes less than about thirty
centimetres, the audible signal becomes
continuous.
The sound emitted by the speaker (right or
left) indicates the side on which the obstacle is
located.
Visual assistance


This supplements the audible signal by
displaying bars on the screen that represent the
distance between the obstacle and the vehicle
(white: more distant, orange: close, red: very
close).
When the obstacle is very close, the "Danger"
symbol is displayed on the screen.
Front parking sensors
In addition to the rear parking sensors, the front
parking sensors are triggered when an obstacle
is detected in front and the speed of the vehicle
is still below 6 mph (10 km/h).
The front parking sensors are interrupted if the
vehicle stops for more than three seconds in
forward gear, if no further obstacles are detected
or when the speed of the vehicle exceeds 6 mph
(10 km/h).
The sound emitted by the speaker (front or rear) indicates whether the obstacle is
in front or behind.
Deactivation / Activation
With / Without audio system


► To deactivate or activate the system, press this button.
The indicator lamp is lit when the system is
deactivated.
With touch screen
► In the Driving / Vehicle menu, select
“Driving functions ”, then “Parking
sensors”.
The state of the system stays in the memory
when the ignition is switched off.
The rear parking sensors system will be deactivated automatically if a trailer or
bicycle carrier is connected to a towing device
installed in accordance with the
manufacturer's recommendations.

128
Practical information
► Refit protective plug 2 to carrier 1.► Carefully stow the towball in its bag away from knocks and dirt.
Maintenance
Correct operation is only possible if the towball
and its carrier are kept clean.
Before cleaning the vehicle with a high-pressure
jet wash, the towball must be removed and the
protective plug fitted to the carrier.
Apply the label provided to a clearly visible area, close to the carrier or in the
boot.
Go to a CITROËN dealer or a qualified
workshop for any work on the towbar system.
Towing device
Load distribution► Distribute the load in the trailer so that the heaviest items are as close as possible to the
axle, and the nose weight approaches the
maximum permitted without exceeding it.
Air density decreases with altitude, thus reducing
engine performance. The maximum load which
can be towed must be reduced by 10% per
1,000 metres of altitude.
Use towing devices and their genuine
wiring harnesses approved by CITROËN.
It is recommended that the installation be
performed by a CITROËN dealer or a
qualified workshop.
If not fitted by a CITROËN dealer, it
must still be fitted in accordance with the
manufacturer's instructions.
Certain driving or manoeuvring aid functions
are automatically deactivated if an approved
towing system is used.
Observe the maximum authorised
towable weight, indicated on the vehicle's
registration certificate, the manufacturer's
label as well as in the Technical data section
of this guide.
Complying with the maximum authorised
nose weight (towball) also includes the
use of accessories (bicycle carriers, tow
boxes, etc.).
Observe the legislation in force in the
country where you are driving.
Load reduction mode
System which manages the use of certain
functions according to the level of charge
remaining in the battery.
When the vehicle is being driven, the load
reduction function temporarily deactivates certain
functions, such as air conditioning, heated rear
screen, etc.
The deactivated functions are reactivated
automatically as soon as conditions permit.
Energy economy mode
This system manages the duration of use of
certain functions, in order to conserve a sufficient
level of charge in the battery with the ignition off.
After switching off the engine, you can still
use functions such as the audio and telematic
system, the wipers and the dipped beam
headlamps or courtesy lamps, for a combined
duration of approximately 40 minutes.
Switching to this mode
A message appears in the instrument panel
screen indicating that the vehicle has switched to
economy mode and the active functions are put
on standby.
If a telephone call is being made at this
time, it will be maintained for around 10
minutes with the Bluetooth hands-free system
of your audio system.
Exiting the mode
These functions are automatically reactivated the
next time the vehicle is used.
To restore the use of these functions
immediately, start the engine and let it run:
– For less than 10 minutes, to use the equipment for approximately 5 minutes.
– For more than 10 minutes, to use the equipment for approximately 30 minutes.
Let the engine run for the specified duration to
ensure that the battery charge is sufficient.
To recharge the battery, avoid repeatedly or
continuously restarting the engine.
A flat battery prevents the engine from
starting.
For more information on the
12 V battery,
refer to the corresponding section.
Roof bars
For safety reasons and to avoid
damaging the roof, it is essential to use
the transverse bars approved for your vehicle.
Observe the fitting instructions and the
conditions of use in the guide supplied
with the roof bars.

151
In the event of a breakdown
8Fuses in the dashboard
Access to the fuses

The 2 fuseboxes are located in the lower part of
the dashboard, below the steering wheel.
► Unclip the cover by pulling at the top left, then right.

The 2 fuseboxes are located in the lower part of
the dashboard, in the glove box.
► Open the glove box.► Unclip the fusebox protection cover.
Upper fusebox

Fuse
No. Rating
(A) Functions
F2 10 Heated door mirrors.
F3 30 Front one-touch
electric windows.
F4 5 Automatic folding
wing mirrors.
F5 30 Rear one-touch
electric windows.
F6 25 Front heated seats.
F7 15 Front electric
windows.
F8 20 Audio amplifier.
F10 25Panoramic roof.
F12 20Sunroof.
Lower fusebox

Fuse
No. Rating
(A) Functions
F3 5 Trailer power supply.
F4 15 Horn.
F5 - F6 20Front and rear
screenwash pump.
F7 10 Rear 12V socket.
F8 20 Rear wiper.

152
In the event of a breakdown
Protect your eyes and face before handling the battery.
All operations on the battery must be carried
out in a well ventilated area and away from
naked flames and sources of sparks, so as to
avoid the risk of explosion or fire.
Wash your hands afterwards.
Access to the battery
The battery is located under the bonnet.

For access to the (+) terminal:► unlock the bonnet by activating the internal command, then the external command.► lift the bonnet, then fix it in place with its rod.(+) Positive terminal.
It has a quick-release clamp.
(-) Negative terminal.
The battery (-) terminal is not accessible, use the
engine mounting.
Fuse
No. Rating
(A) Functions
F10 - F11 30Locking/unlocking of
the doors and fuel
filler flap.
F14 5Alarm, telematic unit.
F27 5Alarm (preparation).
F29 20Telematic audio
system.
F31 15Audio system
(accessory).
F32 15Front 12 V socket.
Fuses in the engine
compartment
The fusebox is placed in the engine
compartment near the battery.
Access to the fuses

► Unclip the cover .► Change the fuse.► When you have finished, close the cover very carefully to ensure correct sealing of the
fusebox.


Fuse
No. Rating
(A) Functions
F15 10 Front left fog
lamp.
F16 10 Front right
fog lamp.
F18 10 Right-hand
main beam
headlamp.
F19 10 Left-hand
main beam
headlamp.
F29 40 Windscreen
wipers.
12 V battery
Procedure for starting the engine using another
battery or charging a discharged battery.
Lead-acid starter batteries
Batteries contain harmful substances such as sulphuric acid and lead.
They must be disposed of in accordance
with regulations and must not, in any
circumstances, be discarded with household
waste.
Take used remote control batteries and
vehicle batteries to a special collection point.

153
In the event of a breakdown
8Protect your eyes and face before
handling the battery.
All operations on the battery must be carried
out in a well ventilated area and away from
naked flames and sources of sparks, so as to
avoid the risk of explosion or fire.
Wash your hands afterwards.
Access to the battery
The battery is located under the bonnet.

For access to the (+) terminal:► unlock the bonnet by activating the internal command, then the external command.► lift the bonnet, then fix it in place with its rod.(+) Positive terminal.
It has a quick-release clamp.
(-) Negative terminal.
The battery (-) terminal is not accessible, use the
engine mounting.
Starting using another
battery
When your vehicle's battery is discharged, the
engine can be started using a backup battery
(external or from another vehicle) and jump
leads or a battery booster.
Never try to start the engine by
connecting a battery charger.
Never use a 24 V or higher battery booster.
Check beforehand that the backup battery
has a nominal voltage of 12 V and a capacity
at least equal to that of the discharged
battery.
The two vehicles must not be in contact with
each other.
Switch off all the electrical consumers on both
vehicles (audio system, wipers, lighting, etc.).
Make sure that the jump leads are not close
to moving parts of the engine (fan, belts, etc.).
Do not disconnect the (+) terminal while the
engine is running.


► Lift the plastic cover on the (+) terminal, if your vehicle has one.► Connect the red cable to the positive terminal (+) of flat battery A (at the metal elbow) then to
the positive terminal (+) of backup battery B or
the booster.
► Connect one end of the green or black cable to the negative terminal (-) of backup battery B
or the booster (or an earth point on the other
vehicle).
► Connect the other end of the green or black cable to earth point C on the broken down
vehicle.
► Start the engine of the vehicle with the good battery and leave it running for a few minutes.► Operate the starter on the broken down vehicle and let the engine run.
If the engine does not start straight away, switch
off the ignition and wait a few moments before
trying again.
► Wait until the engine returns to idle then disconnect the jump lead cables in the reverse
order.

164
Bluetooth® audio system
Bluetooth® audio system

The different functions and settings described vary according to the version
and configuration of your vehicle.
As a safety measure and because it requires sustained attention by the driver,
the pairing of a Bluetooth mobile telephone
with the Bluetooth hands-free system of your
audio system must be done with the vehicle
stationary and the ignition on.
Your audio system is coded in such a way that it will only operate in your
vehicle.
All work on the system must be carried out
exclusively by a dealer or qualified workshop,
to avoid any risk of electrocution, fire or
mechanical faults.
To avoid discharging the battery, the audio system may switch off after a few
minutes if the engine is not running.
First steps
Press: On/Off.Rotate: adjust volume.Short press: change audio source (radio; USB; AUX (if equipment connected); CD;
streaming).
Long press: display the Telephone menu (if a
telephone is connected).
Adjust audio settings:Front/rear fader; left/right balance; bass/
treble; loudness; audio ambience.
Activate/Deactivate automatic volume
adjustment (based on the vehicle’s speed).
Radio :Short press: display the list of radio
stations.
Long press: update the list.
Media :Short press: display the list of folders.
Long press: display the available sorting options.
Select the screen display mode, between:Date; Audio functions; Trip computer;
Telephone.
Confirm or display contextual menu.
Buttons 1 to 6.
Short press: select the preset radio station.
Long press: preset a radio station.
Radio:
Automatic step by step search up/down
for radio stations.
Media:
Select previous/next CD, USB, streaming track.
Scroll in a list.
Radio:
Manual step by step search up/down for
radio stations.
Select previous/next MP3 folder.
Media:
Select previous/next folder/genre/artist/playlist
on the USB device.
Scroll in a list.
Cancel the current operation.Go up one level (menu or folder).Access the main menu.
Activate/Deactivate TA function (traffic announcements).
Long press: select type of announcement.
Selection of FM/DAB/AM wavebands.
Steering mounted controls
Steering mounted controls -
Type 1

Radio:Select the previous / next preset radio
station.
Select the previous / next item in a menu or a
list.
Media:
Select the previous / next track.
Select the previous / next item in a menu or a
list.
Radio:Short press: display the list of radio
stations.
Long press: update the list.
Media:
Short press: display the list of folders.
Long press: display the available sorting options.
Other than telephone call:Short press: changing audio source
(radio; USB; AUX (if equipment connected); CD;
streaming), confirmation if the "Telephone"
menu is open.
Long press: open the " Telephone" menu.
In the event of a telephone call:
Short press: accept the call.
Long press: reject the call.
During a telephone call:
Short press: open the contextual telephone
menu.
Long press: end the call.
Confirm a selection.

165
Bluetooth® audio system
10Radio:Select the previous / next preset radio
station.
Select the previous / next item in a menu or a
list.
Media:
Select the previous / next track.
Select the previous / next item in a menu or a
list.
Radio:Short press: display the list of radio
stations.
Long press: update the list.
Media:
Short press: display the list of folders.
Long press: display the available sorting options.
Other than telephone call:Short press: changing audio source
(radio; USB; AUX (if equipment connected); CD;
streaming), confirmation if the "Telephone"
menu is open.
Long press: open the " Telephone" menu.
In the event of a telephone call:
Short press: accept the call.
Long press: reject the call.
During a telephone call:
Short press: open the contextual telephone
menu.
Long press: end the call.
Confirm a selection.
Increase volume.
Decrease volume.
Mute / Restore sound by simultaneously pressing the increase and decrease
volume buttons.
Steering mounted controls -
Type 2

Access to the main menu.
Increase volume.
Mute / Restore the sound.
Decrease volume.
Other than telephone call:Short press: changing audio source
(radio; USB; AUX (if equipment connected); CD;
streaming), confirmation if the "Telephone"
menu is open.
Long press: open the " Telephone" menu.
In the event of a telephone call:
Short press: accept the call.
Long press: reject the call.
During a telephone call:
Short press: open the contextual telephone
menu. Long press: end the call.
Start voice recognition on your smartphone via the system.Radio:Short press: display the list of radio
stations.
Long press: update the list.
Media:
Short press: display the list of folders.
Long press: display the available sorting options.
Radio:Select the previous / next preset radio
station.
Select the previous / next item in a menu or a
list.
Media:
Select the previous / next track.
Select the previous / next item in a menu or a
list.
Press the thumbwheel: confirm.
Menus
Depending on version."Multimedia": Media settings, Radio
settings.
"Telephone": Call, Directory
management, Telephone management,
Hang up.
"Trip computer".
"Maintenance": Diagnosis, Warning log,
etc.