engine CITROEN C4 2023 Repair Manual

130
Driving
Function statusDisplayComments
ON



"Hold the steering
wheel" or "Stay in lane" (depending on version) If, while correcting the trajectory, the system determines that the correction will not be
enough and that a solid line will be crossed: the driver is warned that \
they must provide
additional trajectory adjustment.
If the steering wheel is not held properly, an audible warning sounds, accompanied by
a message, until the trajectory correction is completed or the driver ha\
s grasped the
steering wheel correctly.
The duration of audible warnings will increase if multiple corrections a\
re performed
in quick succession. The warning will become continuous, persisting until the driver
responds.
Operating limits
The system goes into standby automatically in
the following cases:
–

ESC deactivated or operation triggered.
–


Speed below 40 mph (65
km/h) or greater
than 112 mph (180
km/h).
–

Electrical connection to a trailer
.
–

Use of a"space-saver" spare wheel detected
(as detection is not immediate, deactivation of
the system is recommended).
–


Dynamic driving style detected, pressure on
the brake or accelerator pedal.
–


Driving over lane markings.
–


Activation
of the direction indicators.
–

Crossing the inside line on a bend.
–


Driving on a tight bend.
–


Inactivity by the driver detected during
correction.
–


Narrow lane detected.
The following situations may interfere with the operation of the system or
prevent it from working:
–

Insufficient contrast between the road
surface and the side of the road (e.g. shade).
–


Lane markings worn, hidden (snow
, mud)
or multiple (roadworks, etc.),
–

Close proximity to the vehicle in front (lane
markings may not be detected).
–


Roads that are narrow
, winding.
Risk of undesirable operation
The system should be deactivated in the
following situations:
–
When changing a wheel or working near a
wheel.
–


T
owing or with a bicycle carrier on a towing
device, especially with trailer not plugged in or
not approved. –

Road in poor condition, unstable or with very
poor grip (risk of aquaplaning, snow
, ice).
–
Adverse weather conditions.
–

Driving on racing circuits.
–

Driving on a rolling road.
Deactivation/Activation
By default, the system is automatically activated
at every engine start.
With the dashboard button

133
Driving
6

This system:
– warns the driver that their vehicle is at risk of
collision with the vehicle in front, a pedestrian or
,
depending on version, a cyclist.
–

reduces the vehicle's speed to avoid a
collision or limit its severity

.
The speed will be reduced by a maximum of 12 mph (20 km/h) (versions
with camera only) or by a maximum of 31
mph (50
km/h) (versions with camera and
radar).
The system also takes motorcyclists into account.
This system is comprised of three functions:
–

Collision
Risk Alert.
–

Intelligent emergency braking assistance
(iEBA).
–


Active Safety Brake (automatic emergency
braking).


The vehicle has a multifunction camera located
at the top of the windscreen and, depending on
version, a radar located in the front bumper.
This system does not replace the need for driver vigilance.
This system is designed to assist the driver
and improve road safety.
It is the driver's responsibility to continuously
monitor traffic conditions in accordance with
applicable driving regulations.
As soon as the system detects a potential collision, it prepares the braking
circuit. 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.
With Touch screen BLUETOOTH audio
system or MyCitroën Play
The settings are changed via the Driving
touch screen menu.
With MyCitroën Drive
The settings are changed via the Vehicle
touch screen menu.
With MyCitroën Drive Plus
The settings are changed via the ADAS
touch screen application.
Deactivation of the system is signalled by
the illumination of this warning lamp,
accompanied by the display of a message.
Operating conditions and
limits
Vehicle moving forward without trailer.
Brake system operational.
Seat belts fastened for all passengers.
Stabilised speed on roads with no or low
curvature.
This warning lamp lights up on the instrument panel without any additional
message, to indicate that the automatic braking
system is not available.
This is a normal behavior indicating that a
condition is not fulfilled and which does not
request the support of a workshop.
In any situations with ignition on where automatic
braking presents a risk, deactivating the system
is recommended, for instance:

134
Driving
– Towing a trailer (particularly a trailer without its
own braking system).
–
Carrying long objects on roof bars.
–


Driving with snow chains.
–


Using an automatic car wash.
–


Performing any maintenance (e.g.
changing a
wheel, working inside the engine compartment).
–

Placing the vehicle on a rolling bench in a
workshop.
–


T
owing the vehicle.
–

Following a damage of the windscreen close
to the detection camera.
The system is automatically deactivated when the use of certain types of
"space-saver" spare wheel (smaller diameter)
is detected, or if a fault with the brake pedal
switch or at least two brake lamps is detected.
Following a severe crash (e.g.
with airbag
deployment), the system is automatically
deactivated.
Have it checked by a CITROËN dealer or a
qualified workshop.
In case the detection is degraded or
temporarily unavailable by environment
conditions, then a driver indication is not
displayed (because a driver action is not
requested).
It can be dangerous to drive if the brake
lamps are not in perfect working order.
The driver must not overload the vehicle (keep within the GVW limit and load
height limits for roof bars).
Collision Risk Alert
This function warns the driver if there is a risk
of collision with the preceding vehicle, or with a
pedestrian or cyclist.
Modifying the alert trigger threshold
The trigger threshold determines the sensitivity
with which the function warns of the risk of
collision.
The selected threshold is memorised when the
ignition is switched off.
With Touch screen BLUETOOTH audio
system or MyCitroën Play
The threshold is set via the Driving touch screen menu.
►

Select one of the three pre-defined
thresholds: "

Far", "Normal" or "Close".
With MyCitroën Drive
The threshold is set via the Vehicle touch screen menu.
►

Select one of the three pre-defined
thresholds: "

Far", "Normal" or "Close".
With MyCitroën Drive Plus
The threshold is set via the ADAS touch screen application.
► Select one of the 3 preset thresholds: " Far ",
"Medium" or "Near".
Operation
Depending on the collision risk detected by the
system and the alert trigger threshold chosen
by the driver, different levels of alert may be
triggered and displayed on the instrument panel.
The system takes into account the vehicle
dynamics, the difference speed of the own
vehicle and the object identified for the
collision risk, and the operation of the vehicle
(e.g.
actions on the pedals, steering wheel) to
trigger the alert at the most relevant moment.
(orange)
Level 1: visual alert only, warning that the
preceding vehicle is very close.
The message "Vehicle close" is displayed.
(red)
Level 2: visual and audible alert, warning
that a collision is imminent.
The message "Brake! " is displayed.
Level 3: a micro-braking may be given,
confirming the risk of collision (optional).
While approaching a vehicle too quickly,
the level 2 alert may be displayed
directly.
Important: the level 1 alert depends on the
trigger threshold selected. It reacts only on
moving vehicles. It is disabled automatically
at lower speed.

135
Driving
6It is possible that collision 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.
If you select "Far" in the touch screen,
then the system warns sooner. This
increases the safety but increases also the
amount of alerts, if the legal safety distance is
not kept.
To reduce the alert occurrence, you can
change the setting to either of the other two.
Intelligent emergency
braking assistance (iEBA)
This function increases vehicle deceleration
if the driver does not brake enough to avoid a
collision.
This assistance is only provided if the driver
presses the brake pedal.
Active Safety Brake

This function, also called "automatic emergency
braking", intervenes after the acoustic alert if the
driver does not operate the brake pedal quickly
enough.
The system aims at reducing the speed of
impact or avoiding a collision if the driver fails to
react.
The speed will be reduced by a maximum of 12 mph (20 km/h) (versions
with camera only) or by a maximum of 31
mph (50
km/h) (versions with camera and
radar).
Operation
The system operates in the following speed
ranges:
–

Between 3 mph and 50 mph (5
km/h and
80
km/h) when a stationary vehicle is detected.
–

Between 3 mph and 50 mph (5
km/h and
80
km/h) when a pedestrian is detected.
–

Between 3 mph and 50 mph (5
km/h and
80
km/h) when a cyclist is detected (versions
with camera and radar only).
–

Between 3 mph and 50 mph (5
km/h and
80
km/h) (versions with camera only) or 87 mph
(140
km/h) (versions with cameras and radar)
when a moving vehicle is detected.
This warning lamp flashes (for approximately 10 seconds) as soon as
the function applies the vehicle’s brakes.
During the flashing time, the function is not
available.
With an automatic gearbox or drive selector, in
the event of automatic emergency braking, keep
the brake pedal depressed, also after a complete
stop is reached, to prevent the vehicle from
rolling away.
With a manual gearbox, in the event of automatic
emergency braking bringing the vehicle to a
complete stop, the engine may stall.
The driver can override the automatic emergency braking at any time by
strongly turning the steering wheel (evasive
manoeuver) and/or by firmly pressing the
accelerator pedal.

136
Driving
The brake pedal may feel hard and vibrate slightly while the function is
operating.
If the vehicle comes to a complete stop,
automatic braking is maintained for 1 to 2
seconds.
Malfunction
This warning lamp lights up on the instrument panel, if the automatic braking
system is reduced or degraded.
This is a normal behavior, which does not
request the support of a qualified workshop.
This may be caused by a reduced visibility
(e.g.

rain, fog, snow, blinding by low sun) or by
a real sensor blockage. In this case, stop the
vehicle and verify if the front camera or the front
radar is covered by dirt, snow, ice or anything
preventing the sensing.
In the event of a malfunction, this warning
lamp lights up on the instrument panel,
accompanied by the display of a message and
an audible signal.
Have it checked by a CITROËN dealer or a
qualified workshop.
If these warning lamps come on
after the engine has been switched
off and then restarted, contact a CITROËN
dealer or a qualified workshop to have the
system checked.
These warning lamps light up on the instrument panel and/or in the
warning lamp display for seat belts and front
passenger airbag to indicate that the driver's
and/or front passenger's seat belt is not fastened
(depending on version). The automatic braking
system is deactivated until the seat belts are
fastened.
Distraction detection
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .
Depending on version, the function consists of
either the "Coffee Break Alert" system alone or
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.
Take a break if you are feeling tired or at least
every 2 hours.
Activation/Deactivation
By default, the function is automatically activated
at every engine start.
With Touch screen BLUETOOTH audio
system or MyCitroën Play
The settings are changed via the Driving
touch screen menu.
With MyCitroën Drive
The settings are changed via the Vehicle
touch screen menu.
With MyCitroën Drive Plus
The settings are changed via the ADAS
touch screen application.
Coffee Break Alert
The system triggers an alert when it detects that the driver has not taken a
break after two hours of driving at a speed above
43 mph (70
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.

139
Driving
6The parking sensors are deactivated while the
Park Assist function is measuring a space.
For more information on the Park Assist
function, refer to the corresponding section.
When starting the vehicle, the graphic
and audible aids are only available after
the touch screen has started up.
Operating limits
If the boot is heavily loaded, the vehicle may tilt,
affecting distance measurements.
Malfunction
In the event of a malfunction when
changing into reverse gear, these
warning lamps light up on the instrument panel,
accompanied by the display of a message and
an audible signal (short beep).
Have it checked by a CITROËN dealer or a
qualified workshop.
Reversing camera
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .


The reversing camera is activated automatically
when reverse gear is engaged.
The image is displayed on the touch screen.
The reversing camera function may be
supplemented by the parking sensors.


The blue lines 1 indicate the general direction of
the vehicle (the gap corresponds to the width of
your vehicle including the mirrors).
The red line 2 represents a distance of about
30
cm beyond the edge of your vehicle's rear
bumper.
The green lines 3 represent distances of about 1
and 2 metres beyond the edge of your vehicle's
rear bumper.
The turquoise curves 4 show the maximum
turning angle in either direction.
C4
Opening the tailgate causes the display
to disappear.
Clean the reversing camera regularly
using a soft, dry cloth.
Top Rear Vision - 360 Vision
With MyCitroën Play or
MyCitroën Drive
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .
With the engine running, these systems allow
views of your vehicle’s close surroundings to be
displayed on the touch screen using one camera
for Top Rear Vision and two cameras for 360
Vision.

142
Driving
offering views from the rear of the vehicle (rear
vision) when reverse gear is engaged and views
from the front of the vehicle (front vision) when
the gearbox is in neutral or a gear is engaged.
Rear vision

The system activates automatically when
reverse gear is engaged.
The system is deactivated:
–
Automatically
, at speeds above approximately
12 mph (20
km/h),
–

when shifting out of reverse (the rear view
image is replaced by the front view image after
7 seconds).
–


By pressing the white arrow in the upper-left
corner of the touch screen.
If a trailer or a bicycle carrier is fitted to
the towball, the area behind the vehicle
on the view from above goes dark.
The surroundings are reconstructed by the
front camera only. The rear vision views are similar to those for the
Top Rear Vision function.
For more information on the
Top Rear
Vision

function, refer to the corresponding
section.
Front and rear vision

With the engine running and the speed
below 12 mph (20 km/h), the system is
activated via the Driving/Vehicle touch screen
menu:
►

Select "
Visual parking assistance".
AUTO mode is displayed by default, with front
vision, if the gearbox is in neutral or with a
gear engaged, or with rear vision, if reverse is
engaged.
The system is deactivated:
–

Automatically above about 19 mph (30
km/h)
(the image disappears temporarily from 12 mph
(20

km/h)).
–

By pressing the white arrow in the upper-left
corner of the touch screen.
AUTO mode

This mode is activated by default.
Using sensors in the front bumper, the automatic
view changes from the front view (standard) to
the view from above (zoom) as an obstacle is
approached during a manoeuvre.
Standard view

The area in front of your vehicle is displayed on
the screen.
The orange lines 1 represent the width of your
vehicle, with the mirrors unfolded; their direction
changes according to the position of the steering
wheel.

143
Driving
6The red line 2 represents a distance of 30 cm
from the front bumper; the two orange lines 3
and 4 represent 1 m and 2 m, respectively.
This view is available with AUTO mode or in the
view selection menu.
Zoom view

The camera records the vehicle's surroundings
during the manoeuvre in order to create a
view from above the front of the vehicle in its
near surroundings, allowing the vehicle to be
manoeuvred around obstacles nearby.
This view is available with AUTO mode or in the
view selection menu.
Obstacles may appear further away than
they actually are.
It is important to check the sides of the
vehicle during the manoeuvre, using the
mirrors.
The parking sensors also supplement the
information on the vehicle's surroundings.
180° view

The 180° view assists with exiting from a parking
space in forward gear, making it possible to
see the approach of vehicles, pedestrians and
cyclists.
This view is not recommended for carrying out a
complete manoeuvre.
It consists of 3 areas: left A, centre B and right
C.
This view is available only from the view
selection menu.
Top Rear Vision - 360 Vision
With MyCitroën Drive Plus
Top Rear Vision
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .
When reverse gear is engaged, with the engine
running, this system displays views of the
vehicle's close surroundings
on the touch screen
using a camera located at the rear of the vehicle.




The screen is divided into 3 parts with a side
menu, a contextual view and a view from above
the vehicle in its close surroundings.
The parking sensors supplement the information
in the view from above the vehicle.
Different contextual views are available:
–
Automatic zoom view
.

146
Driving
– adjust the volume of the audible signal.
– adjust the brightness.
–

adjust the contrast.
Activation/Deactivation
Automatic
With the rear camera, engine running and
vehicle stationary, rear vision is displayed
automatically if reverse gear is engaged.
With the front camera, engine running and speed
below 10 mph (16 km/h), rear vision is displayed
automatically if a gear is engaged.
Manual
► In the ADAS touch screen application,
select Functions>Panoramic Camera.
The system is deactivated:
–

automatically for the rear
, when changing out
of reverse gear.
–

automatically for the front, above
approximately 10 mph (16 km/h).
–


by pressing the cross in the top left-hand
corner of the touch screen.
Automatic zoom view

The front or rear camera records the
surroundings during the manoeuvre to create
a front or rear view from above the vehicle in
its close surroundings, making it possible to
manoeuvre the vehicle around the surrounding
obstacles.
Using the sensors located on the front or
rear
bumper, the automatic zoom view is
displayed when approaching an obstacle at the
red line (less than 30 cm) during the manoeuvre.
This view is only available automatically.
Depending on version, it can be activated/
deactivated in the ADAS application of the touch
screen.
Obstacles may appear further away than
they actually are.
It is important to monitor the sides of the
vehicle during the manoeuvre, using the
mirrors.
Parking sensors also provide additional
information about the area around the vehicle.
Standard view

Depending on the context, the area behind or in
front of your vehicle is displayed on the screen.
The blue lines (at the rear)/orange lines (at the
front) 1 represent the width of your vehicle, with
the mirrors unfolded;
their direction changes
according to the position of the steering wheel.
The red line 2 represents a distance of 30 cm
from the rear or front bumper; the two blue lines
(at the rear)/orange lines (at the front)

3
and
4
represent 1 m and 2 m respectively.
This view is available automatically or by
selection in the left-hand side menu.
Panoramic view

The rear or front panoramic view allows you to
leave a parking space by anticipating the arrival
of vehicles, pedestrians or cyclists.
This view is not recommended for carrying out a
complete manoeuvre.
This view is only available by selection in the left-
hand side menu.
Park Assist
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .

149
Driving
6The images from the camera(s) displayed on the touch screen may be
distorted by the terrain.
In shady areas, or in inadequate sunlight
or lighting conditions, the image may be
darkened and with lower contrast.
The manoeuvre can be permanently interrupted
at any time, either by the driver or automatically
by the system.
Interruption by the driver can be done by:
–

taking over control of the steering.
–


activating the direction indicator lamps on the
opposite side to that of the manoeuvre.
–


unfastening the seat belt.
–


switching off the ignition.
The manoeuvre is automatically interrupted by
the system in the following cases:
–


vehicle exceeding the speed limit of
5


mph (7 km/h) during parking space entry
manoeuvres, or 3
mph (5 km/h) during parking
space exit manoeuvres.
–

activation of anti-slip regulation on a slippery
road.
–


opening of a door or the boot.
–


engine stall.
–


system malfunction.
–


after 10 manoeuvres to enter or exit a parallel
parking space and after 7 manoeuvres to enter a
parking bay

.
Interrupting the manoeuvre automatically
deactivates the function. Depending on audio equipment, the manoeuvre
symbol is displayed in red, accompanied by the
"Manoeuvre cancelled" message on the touch
screen.
A message prompts the driver to take back
control of the vehicle.
The function is deactivated after a few seconds
and returns to the initial display.
Depending on audio equipment, this
indicator lamp goes off.
End of the parking space entry or exit
manoeuvre
The vehicle stops as soon as the manoeuvre is
completed.
Depending on audio equipment, the manoeuvre
symbol is displayed in red, accompanied by the
message "Manoeuvre completed" on the touch
screen.
Depending on audio equipment, when the
function is deactivated, this indicator lamp
goes off, accompanied by an audible signal.
When entering a parking space, the driver may
be required to complete the manoeuvre.
Operating limits
– The system may suggest an inappropriate
parking space (parking prohibited, work in
progress with damaged road surface, location
alongside a ditch, etc.).
–

The system may indicate that a space has
been found but will not offer it because of a fixed
obstacle on the opposite side of the manoeuvre,
which would not allow the vehicle to follow a
trajectory required for parking.
–

The system may indicate that a space has
been found but the manoeuvre will not be
triggered, because the width of the lane is
insufficient.
–


The system is not designed for performing the
parking manoeuvre on a sharp bend.
–


The system does not detect spaces that
are much larger than the vehicle itself or that
are delimited by obstacles that are too low
(pavements, studs, etc.) or too thin (trees, posts,
wire fences, etc.).
–


If the boot is heavily loaded, the tilt of the
vehicle towards the rear may interfere with the
distance measurements.
Do not use the function under the
following exterior conditions:
–

Alongside a soft shoulder (e.g. ditch) or
quay or on the edge of a drop.
–


When the road surface is slippery (e.g. ice).
If any of the following malfunctions
occurs, do not use the system:
–

If a tyre is under-inflated.
–


If one of the bumpers is damaged.
–


If one of the cameras is faulty
.