ECU CITROEN C3 AIRCROSS 2021 Handbook (in English)

80
Safety
“ISOFIX" mountings
The seats shown below are fitted with ISOFIX
compliant mountings:


The mountings comprise three rings for each
seat, indicated by a marking:
– Two rings A, located between the vehicle seat
backrest and cushion.


The 2 latches of ISOFIX child seats are secured
to them.
– One ring B, located behind the seat, called
the TOP TETHER, for fixing seats fitted with an
upper strap.


This system prevents the child seat from tipping
forward in the event of a front impact.
This ISOFIX mounting system provides fast,
reliable and safe fitting of the child seat in the
vehicle.
To secure the child seat to the TOP TETHER:
► Remove and stow the head restraint before
installing the child seat on this seat (refit it once
the child seat has been removed).
► Pass the upper strap of the child seat behind the seat backrest, between the head restraint
rods.
► Secure the upper strap hook to ring B.► Tighten the upper strap.
When fitting an ISOFIX child seat to the
left-hand rear seat of the bench seat,
before fitting the seat, first move the centre
rear seat belt towards the middle of the
vehicle, so as to avoid the seat interfering
with the operation of the seat belt.
An incorrectly installed child seat compromises the child's safety in the
event of an accident.
Strictly observe the fitting instructions
provided in the user guide supplied with the
child seat.
For information about the installation
possibilities for ISOFIX child seats in
your vehicle, refer to the summary table.
Recommended ISOFIX child
seats
Also consult the user guide from the child seat’s manufacturer to find out how to
install and remove the seat.
Summary table of locations for ISOFIX child seats
In accordance with European regulations, this table shows the options for installing ISOFIX child seats on vehicle seats fitted with ISOFIX mountings.
In the case of universal and semi-universal ISOFIX child seats, the ISOFIX size category , determined by a letter from A to G, is indicated on the child seat
next to the ISOFIX logo.
Weight of the child
/ indicative age
Under 10 kg(group 0)Up to about 6 months old
Under 10 kg(group 0)Under 13 kg (group 0+)Up to about 1 year old
From 9 to 18 kg(group 1)
From about 1 to 3 years old
Type of ISOFIX child seat CarrycotRearward facing Rearward
facing Forward facing

81
Safety
5"RÖMER Baby-Safe Plus and its ISOFIX base"
(size category: E)
Group 0+: from birth to 13 kg


Installed "rearward facing" using an ISOFIX base which is attached to rings A.
The base has a support leg, height-
adjustable, which rests on the vehicle's floor. This child seat can also be secured with a
seat belt. In this case, only the shell is used and attached to the vehicle seat using the three-point seat belt.
"RÖMER Duo Plus ISOFIX "
(size category: B1)
Group 1: from 9 to 18 kg


"RÖMER Duo Plus ISOFIX "
(size category: B1)
Group 1: from 9 to 18 kg
Suitable for forward-facing installation only.
Attached to rings A and ring B, referred to as
TOP TETHER, using an upper strap.
Three seat body angles: sitting, reclining, lying down.
This child seat can also be used in seat positions not equipped with ISOFIX
mountings. In this case, it must be secured to the vehicle's seat by the three-point seat belt. Adjust the front seat of the vehicle so that the child's feet do not touch the backrest.
Summary table of locations for ISOFIX child seats
In accordance with European regulations, this table shows the options for installing ISOFIX child seats on vehicle seats fitted with ISOFIX mountings.
In the case of universal and semi-universal ISOFIX child seats, the ISOFIX size category , determined by a letter from A to G, is indicated on the child seat
next to the ISOFIX logo.
Weight of the child / indicative age
Under 10 kg(group 0)Up to about 6 months old
Under 10 kg(group 0)Under 13 kg (group 0+)Up to about 1 year old
From 9 to 18 kg(group 1)
From about 1 to 3 years old
Type of ISOFIX child seat CarrycotRearward facing Rearward
facing Forward facing

82
Safety
Weight of the child / indicative age
Under 10 kg(group 0)Up to about 6 months old
Under 10 kg(group 0)Under 13 kg (group 0+)Up to about 1 year old
From 9 to 18 kg(group 1)
From about 1 to 3 years old
ISOFIX size category FG CD EC DABB1
Seat
Row 1 (a) Passenger seat


Front
passenger airbag
deactivated "OFF " Not ISOFIX
Front
passenger airbag
activated "ON" Not ISOFIX
Row 2 (b)
Rear side seats

X IL ILIUF / IL
Rear central seat


Not ISOFIX
(a): refer to the legislation in force in your country before installing a child in this seat position.
(b): to install a “rearward facing” or “forward facing” child seat at the rear , slide the rear seat as far backwards as possible, with the backrest straightened.
IUF: seat position suitable for installing an Isofix Universal seat, "Forward facing", secured using the upper strap.
IL: seat position suitable for installing an Isofix Semi-Universal seat, either:– "rearward facing" fitted with an upper strap or a support leg.– “forward facing”, fitted with a support leg.– a carrycot fitted with an upper strap or a support leg.For securing the upper strap using the ISOFIX mountings, refer to the corresponding section.
X: seat position not suitable for installing an ISOFIX seat or carrycot for the weight group indicated.
i-Size child seats
i-Size child seats have two latches that engage on the two rings A.
These i-Size child seats also have:
– either an upper strap that is attached to ring B.– or a support leg that rests on the vehicle floor, compatible with the approved i-Size seat position.Their role is to prevent the child seat from tipping forward in the event of a collision.
For more information on the ISOFIX mountings, refer to the corresponding section.
In accordance with the new European regulations, this table indicates the options for installing i-Size child seats on seats in the vehicle fitted with ISOFIX
mountings approved for i-Size.
Seat i-Size restraint system
Row 1 (a) Passenger seat with passenger
airbag deactivated "OFF"


Not i-Size
Passenger seat with passenger
airbag activated "ON" Not i-Size
Row 2 (b)
Rear side seats

i-U
Rear central seat


Not i-Size
i-U: suitable for i-Size restraint systems in the "Universal" category , "forward facing" and "rearward facing".

83
Safety
5IL: seat position suitable for installing an Isofix Semi-Universal seat, either:– "rearward facing" fitted with an upper strap or a support leg.– “forward facing”, fitted with a support leg.– a carrycot fitted with an upper strap or a support leg.For securing the upper strap using the ISOFIX mountings, refer to the corresponding section.
X: seat position not suitable for installing an ISOFIX seat or carrycot for the weight group indicated.
i-Size child seats
i-Size child seats have two latches that engage on the two rings A.
These i-Size child seats also have:
– either an upper strap that is attached to ring B.– or a support leg that rests on the vehicle floor , compatible with the approved i-Size seat position.Their role is to prevent the child seat from tipping forward in the event of a collision.
For more information on the ISOFIX mountings, refer to the corresponding section.
In accordance with the new European regulations, this table indicates the options for installing i-Size child seats on seats in the vehicle fitted with ISOFIX
mountings approved for i-Size.
Seat i-Size restraint system
Row 1 (a) Passenger seat with passenger
airbag deactivated "OFF"

Not i-Size
Passenger seat with passenger
airbag activated "ON" Not i-Size
Row 2 (b)
Rear side seats

i-U
Rear central seat


Not i-Size
i-U: suitable for i-Size restraint systems in the "Universal" category , "forward facing" and "rearward facing".

99
Driving
6the whole manoeuvre, in particular using the
mirrors.


Driving aids camera
This camera and its associated functions
may be impaired or not work if the windscreen
area in front of the camera is dirty, misty,
frosty, covered with snow, damaged or
masked by a sticker.
In humid and cold weather, demist the
windscreen regularly.
Poor visibility (inadequate street lighting,
heavy rain, thick fog, snowfall), dazzle
(headlamps of an oncoming vehicle, low sun,
reflections on a damp road, leaving a tunnel,
alternating shade and light) can also impair
detection performance.
In the event of a windscreen replacement,
contact a CITROËN dealer or a qualified
workshop to recalibrate the camera;
otherwise, the operation of the associated
driving aids may be disrupted.
Other cameras
The images from the camera(s)
displayed on the touch screen or on the
instrument panel may be distorted by the
relief.
In the presence of areas in shade, or in
conditions of bright sunlight or inadequate
lighting, the image may be darkened and with
lower contrast.
Obstacles may appear further away than they
actually are.
Sensors
The operation of the sensors as well as
the associated functions may be disturbed
by sound interference such as that emitted
by noisy vehicles and machinery (e.g. lorries,
pneumatic drills), by the accumulation of
snow or dead leaves on the road or in the
event of damaged bumpers and mirrors.
When reverse gear is engaged, an audible
signal (long beep) indicates that the sensors
may be dirty.
A front or rear impact to the vehicle can
upset the sensors’ settings, which is not
always detected by the system: distance
measurements may be distorted.
The sensors do not systematically detect
obstacles that are too low (pavements, studs)
or too thin (trees, posts, wire fences).
Certain obstacles located in the sensors’ blind
spots may not be detected or may no longer
be detected during the manoeuvre.
Certain materials (fabrics) absorb sound
waves: pedestrians may not be detected.
Maintenance
Clean the bumpers and door mirrors and
the field of vision of the cameras regularly.
When washing your vehicle at high pressure,
direct the spray from at least 30 cm away from the sensors and cameras.
Mats
The use of mats not approved by
CITROËN may interfere with the operation of
the speed limiter or cruise control.
To avoid any risk of jamming the pedals:
– Ensure that the mat is secured correctly .– Never fit one mat on top of another.
Units of speed
Ensure that the units of speed displayed
in the instrument panel (mph or km/h) are
those for the country you are driving in.
If this is not the case, when the vehicle is
stationary, set the display to the required
units of speed so that it complies with what is
authorised locally.
In case of doubt, contact a CITROËN dealer
or a qualified workshop.
Head-up display
System which projects various information onto a
smoked blade in the driver's field of vision so that
they do not have to take their eyes off the road.

102
Driving
This system displays the maximum authorised
speed in the instrument panel, according to
the speed limits in the country in which you are
driving, using:
– Speed limit signs detected by the camera.– Speed limit details from the navigation system mapping.
Navigation mapping should be regularly
updated in order to receive accurate
speed limit information from the system.
The units for the speed limit (mph or km/h) depend on the country you are
driving in.
This should be taken into account so that you
observe the speed limit.
For the system to work correctly when
changing country, the speed unit in the
instrument panel must correspond to that of
the country you are driving in.
The automatic reading of road signs is a driving aid system and does not always
display speed limits correctly.
The speed limit signs present on the road
always take priority over the display by the
system.
The system is designed to detect signs that
conform to the Vienna Convention on road
signs.
Specific speed limits, such as those for
heavy goods vehicles, are not displayed.
The display of the speed limit in the
instrument panel is updated when passing
a speed limit sign intended for cars (light
vehicles).
Display on the instrument
panel



Head-up display
1. Speed limit indication
Speed display

The system is active but is not detecting speed
limit information.


On detection of speed limit information, the
system displays the value.


The driver can adjust the vehicle’s speed according to the information given by the system.
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
"ADVISED SPEED" (Speed limit recognition).
With audio system
► In the "Personalisation-
configuration " menu, activate/deactivate
"Speed recommendation".
With touch screen
► In the Driving / Vehicle menu, select
the "Vehicle settings" tab, then
"Security" and activate/deactivate " Displaying
of the recommended speed.".
Information display
With an LCD text instrument panel, the speed
limit recognition information is displayed after the
trip computer information.
To display it:

103
Driving
6The driver can adjust the vehicle’s speed
according to the information given by the system.
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
"ADVISED SPEED" (Speed limit recognition).
With audio system
► In the "Personalisation-
configuration " menu, activate/deactivate
"Speed recommendation".
With touch screen
► In the Driving / Vehicle menu, select
the "Vehicle settings" tab, then
"Security" and activate/deactivate " Displaying
of the recommended speed.".
Information display
With an LCD text instrument panel, the speed
limit recognition information is displayed after the
trip computer information.
To display it:


► Press the button located on the end of the wiper control stalk .

► Or, depending on equipment, press the knob located on the steering wheel.
Operating limits
The system does not take account of reduced
speed limits, especially those imposed in the
following cases:
– poor weather (rain, snow),– atmospheric pollution,– when towing,– driving with a space-saver type spare wheel or snow chains fitted,– Tyre repaired using the temporary puncture repair kit,– young drivers.It is possible for the system to not display the
speed limit if it does not detect a speed limit
sign within a preset period and in the following
situations:
– road signs that are obstructed, do not comply with the standard, are damaged or distorted,– obsolete or incorrect maps.
Memorising the speed
setting

In addition to Speed Limit Recognition and
Recommendation, the driver can select the
speed displayed as a speed setting for the speed
limiter or cruise control using the speed limiter or
cruise control memorisation button.
For more information on the Speed
limiter or Cruise control, refer to the
corresponding sections.
Steering mounted controls
1.Speed limiter/cruise control mode selection
2. Memorise the speed setting
Display on the instrument panel

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.

11 2
Driving
With touch screen
► In the Driving / Vehicle menu, select
the "Vehicle settings" tab, then
"Security" and activate/deactivate " Fatigue
Detection System ".
Coffee Break Alert
The system triggers an alert as soon as it detects that the driver has not taken a
break after two hours of driving at a speed above
40 mph (65 km/h).This alert is issued via the display of a message
encouraging the driver to take a break,
accompanied by an audible signal.
If the driver does not follow this advice, the alert
is repeated hourly until the vehicle is stopped.
The system resets itself if one of the following
conditions is met:
– With the engine running, the vehicle has been stationary for more than 15 minutes.– The ignition has been switched off for a few minutes.– The driver's seat belt is unfastened and their
door is opened.
As soon as the speed of the vehicle drops below 40 mph (65 km/h), the system goes into standby.
The driving time is counted again once the
speed is above 40 mph (65 km/h).
Driver Attention Warning
Depending on version, the "Coffee Break Alert"
system is combined with the "Driver Attention
Warning" system.


Using a camera placed at the top of the windscreen, the system assesses the
driver's level of vigilance, fatigue or distraction by
identifying variations in trajectory compared to
the lane markings.
This system is particularly suited to fast roads
(speed higher than 40 mph (65 km/h)).At a first-level alert, the driver is warned by the
“Take care! ” message, accompanied by an
audible signal.
After three first-level alerts, the system triggers
a further alert with the message " Dangerous
driving: take a break", accompanied by a more
pronounced audible signal.
In certain driving conditions (poor road
surface or strong winds), the system may
give alerts independent of the driver's level of
vigilance.
The following situations may interfere with the operation of the system or
prevent it from working:
– lane markings absent, worn, hidden (snow , mud) or multiple (roadworks);– close to the vehicle ahead (lane markings not detected);– roads that are narrow, winding, etc.
Lane Departure Warning
System
Refer to the General recommendations on the
use of driving and manoeuvring aids .
This system, using a camera which recognises
solid or broken lines, detects the involuntary
crossing of longitudinal traffic lane markings on
the ground.
If the driver's attention drops and the speed
is higher than 37 mph (60 km/h), the system triggers a warning if there is an unexpected
change of direction.
This system is particularly useful on motorways
and main roads.


Deactivation / Activation
The system is activated every time the ignition
is switched on.


OFF

► To deactivate the system, press this button.Deactivation is signalled by the lighting
of the indicator lamp on the button and
this warning lamp on the instrument panel.
Reactivation is carried out via another press; the
indicator lamp on the button and the warning
lamp go out.
Detection
If an unexpected change of direction is detected, this warning lamp flashes in the
instrument panel accompanied by an audible
signal.
No warning is transmitted while the direction
indicator is activated and for approximately 20