2023 CITROEN C4 lane assist

124
Driving
All operating conditions are met; the system is
active.
(orange)
System malfunction.
If the driver no longer wishes to use the system
for some time, they can deactivate it by pressing
the button again (confirmed when the symbol
disappears).
The system status is saved when the ignition is switched off.
Operating conditions
– Adaptive cruise control active.
– ESC system operational.
–

ASR system activated.
–


No trailer detected.
–


No 'space-saver' spare wheel in use.
–


V
ehicle not subject to strong lateral g-forces.
–

Direction indicators not activated.
Regulation
The driver must hold the steering wheel
properly.
When regulation is activated, the symbols are
displayed in green: with small steering inputs,
the system steers the vehicle and keeps it in the
position chosen by the driver in the traffic lane.
This position is not necessarily the centre of the
lane.
The driver can feel movements in the steering
wheel.
At any time, the driver can change the position of
the vehicle by intervening on the steering wheel
and maintaining the position until the system has
taken it into account. If the chosen position is too
off-centre, an automatic re-centering manoeuvre
can occur. The system adjusts to the newly
defined position.
Pausing/Suspending the
system
The driver must act promptly if they believe that the traffic conditions or the
state of the road surface require their
intervention, by moving the steering wheel to
temporarily suspend system operation. Any
action on the brake pedal that causes the
Adaptive cruise control
system to be paused
will also cause the system to be paused.
If the system detects that the driver is not
holding the wheel firmly enough, it
triggers a series of gradual alerts and then
deactivates itself if there is no response from
the driver.
If the function is suspended due to the
prolonged release of the force holding
the steering wheel, the system must be
reactivated by pressing the button again.
Automatic suspension
Suspension of the system is accompanied by a
specific audible signal.
–

T
riggering of the ESC system.
–

Insufficient lane detection. In this case, the
Lane keeping assist function can take over

,
and the system will reactivate itself once the
operating conditions are met again.
Paused by the driver
– Travelling outside the lane limits.
– T oo tight a grip on the steering wheel or
dynamic action on the steering wheel.
–

Action on the brake pedal (resulting in a pause
until cruise control is reactivated) or accelerator
pedal (suspension for as long as the pedal is
depressed).
–


Pausing of the
Adaptive cruise control system.
–

Deactivation of the
ASR system.

125
Driving
6Driving situations and related alerts
The tables below describe the displays associated with the main driving situations. The actual order of display of these alerts may be different.
The locations of these symbols vary according to the display mode select\
ed on the instrument panel and whether or not the head-up display is act\
ivated (if
fitted to vehicle).
Symbols Comments

(grey)

Cruise control paused.
Lane positioning assist not selected.


(green)

Cruise control on.
Lane positioning assist not selected.

126
Driving
SymbolsComments

(green)

(green)

(green lines) Highway Driver Assist system activated.
Lane positioning assist is operating normally (steering wheel correctio\
n active).

(grey)

(grey)

Highway Driver Assist system paused by the driver.

127
Driving
6SymbolsComments

(grey)
(green)

Highway Driver Assist system activated.
All the operating conditions for lane positioning assist have not been m\
et.


(grey)

(green)

Highway Driver Assist system suspended.
Cruise control and lane positioning assist are suspended.
Messages Driving situations
"Keep your hands on the steering wheel " Prolonged driving without holding the steering wheel, holding it imprope\
rly or without
applying any force.
"Hold the steering wheel "Actual or imminent loss of lane positioning assist.
"Take back control" Simultaneous loss of cruise control and lane positioning assist.

128
Driving
Operating limits
The system may issue an alert when the vehicle is travelling on a long, straight
road with smooth road surface even if the
driver thinks they are holding the steering
wheel correctly.
The system may not operate or may produce
unsuitable corrections to the steering in the
following situations:
–

Poor visibility (insufficient road lighting,
snowfall, rain, fog).
–


Dazzle (headlamps of an oncoming vehicle,
low sun, reflections on a wet road surface,
leaving a tunnel, alternating light and shade).
–


Windscreen area in front of the camera
dirty

, misted up, frost-covered, snow-covered,
damaged or covered by a sticker.
–

Lane markings eroded, partially hidden (snow
,
mud) or multiple (roadworks, surface joints).
–

T

ravelling in a tight bend.
–

Winding roads.
–


Presence of a tarmac joint on the road.
Risk of undesirable operation
The system should be deactivated in the following situations:
–

Driving with a "space-saver" type spare
wheel.
–


When towing or with a bicycle carrier
attached to a towing device, particularly when
a trailer is not connected or the trailer is not
an approved type.
–

Adverse weather conditions.
–


Driving on slippery road surfaces (risk of
aquaplaning, snow

, ice).
–

In roadworks or toll booth areas.
–


Driving on racing circuits.
–


Driving on a rolling road.
Malfunction
In the event of a malfunction, the
Service warning lamp comes on
and this (orange) symbol appears 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.
Lane keeping assist
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .
The system corrects the vehicle's trajectory by
alerting the driver as soon as it detects a risk of
involuntary lane departure or crossing of a verge
or hard shoulder (depending on version).
To do this, the system uses a camera, placed on
the upper part of the windscreen, identifying the
lane markings on the ground and the side of the
road (depending on version).
This system is particularly useful on
motorways and main roads.


Operating conditions
– Vehicle speed between 40 and 112 mph (65
and 180 km/h).
–

Road marked with a central dividing line.
–


Steering wheel held in both hands.
–


Direction indicators not activated.
–


ESC system activated and operational.
The system helps the driver only if there is a risk of the vehicle unintentionally
wandering from the lane it is being driven in. It
does not manage the safe driving distance,
vehicle speed or braking.
The driver must hold the steering wheel with
both hands in a way that allows control to
be maintained in circumstances where the
system is not able to intervene (for example, if
the central dividing line disappears).
Operation
As soon as the system identifies a risk of
involuntarily crossing one of the lane markings
detected on the ground or a lane boundary
(e.g.
grass verge), it performs the trajectory

131
Driving
6► Press and hold this button to deactivate or
press briefly to reactivate the system at any time.
Deactivation is signalled by the lighting of
the indicator lamp in the button and this
warning lamp in the instrument panel.
With MyCitroën Drive Plus
It is configured in the ADAS touch screen
application or via the Shortcuts for
driving aids .
Deactivation is confirmed by the
illumination of this indicator lamp on the
instrument panel.
Malfunction
In the event of a malfunction,
these warning lamps light 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.
Blind spot monitoring
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .


This system warns the driver of a potential
danger posed by the presence of another vehicle
(car, lorry, motorcycle) in the vehicle's blind
spots (areas hidden from the driver's field of
vision) using sensors located on the sides of the
bumpers.


A warning lamp appears in the door mirror on the
side in question:
–

fixed
, immediately, when being overtaken.
–

flashing , after a delay of about one second,
when overtaking a vehicle slowly

, and when the
direction indicator is used.
Activation/Deactivation
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.
When starting the vehicle, the warning lamp
comes on in each mirror to indicate that the
system is activated.
The status of the system is memorised when the
ignition is switched off.
The system is automatically deactivated when towing with a towing device
approved by CITROËN.
Operating conditions
– All vehicles are moving in the same direction
and in adjacent lanes.
–

The speed of your vehicle must be between
7

and 87 mph (12 and 140 km/h) (versions
without Park Assist) or between 19
and 87 mph
(30
and 140 km/h) (versions with Park Assist).
–

When overtaking a vehicle, the speed
difference is less than 6

mph (10 km/h).

137
Driving
6As soon as the speed of the vehicle drops below 43 mph (70 km/h), the
system goes into standby.
Driving time starts being counted again once
the speed reaches above 43
mph (70 km/h).
Driver Attention Warning
Depending on version, the Coffee Break Alert
system may be combined with the Driver
Attention Warning system.


The system assesses the driver's level of alertness, fatigue and distraction by
identifying trajectory changes in relation to the
lane markings.
To do this, the system uses a camera, placed on
the upper part of the windscreen.
This system is particularly suited to fast roads
(speed higher than 43 mph (70
km/h)).
At a first alert level, the driver is warned by
the message "Caution!", accompanied by an
audible signal.
After three first-level alerts, the system triggers
a further alert with the message " Driving at
risk: 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.
Parking sensors
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids .


This system detects and signals the proximity of
obstacles (e.g.
pedestrian, vehicle, tree, barrier)
using sensors located in the bumper.
Rear parking sensors
► Engage reverse gear to start the system
(confirmed by an audible signal).
The system is switched off when reverse gear is
disengaged.
Audible assistance

The system signals the presence of obstacles
which are both within the sensors’ detection zone
and in the vehicle path defined by the direction of
the steering wheel.
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.

274
Alphabetical index
Immobiliser, electronic 95
Indicator, AdBlue® range
21
Indicator, coolant temperature

21
Indicator, engine oil level

20
Indicators, direction

66, 188
Indicator, service

19
Inflating tyres

174, 203
Inflating tyres and accessories
(using the kit)

181, 183
Information, vehicle

10, 268
Infrared camera

11 0
Instrument panel

10, 26, 111
Instrument panel, LCD

10
Internet browser

236, 239
ISOFIX mountings

87, 90–91
J
Jack 181, 184, 242
Jump starting
192
K
Key 32, 34, 37
Key, electronic
35–36
Keyless Entry and Starting

32, 34–36, 96–97
Key not recognised

97–98
Key with remote control

32, 95
Kit, hands-free

208–209, 218–219, 244, 260
Kit, puncture repair

181
Kit, temporary puncture repair 180–183
Klaxon
75
L
Labels, identification 202
Lamps, parking
66
Lamps, rear

189–190
Lamps with Full LED technology

70
Lane assist

118, 123–125
Lane keeping assist

128
Leather (care)

179
LEDs - Light-emitting diodes

66, 188–189
Level, AdBlue®

173
Level, brake fluid

172
Level, Diesel additive

173
Level, engine coolant

21, 172
Level, engine oil

20, 171
Levels and checks

170–172
Level, screenwash fluid

71, 172
Light-emitting diodes - LEDs

66, 188–189
Lighting, boot

64
Lighting, cornering

70
Lighting dimmer

25
Lighting, exterior

65, 68
Lighting, guide-me home

33, 67–68
Lighting, interior

62–63
Lighting, mood

63
Lighting, welcome

67–68
Loading

167–168
Load reduction mode

169
Locking 33–35
Locking from the inside
36
Locking the doors

36–37
Log, alerts

24
Lumbar

46
M
Mains socket (domestic network) 156
Maintenance (advice)
154, 177
Maintenance, routine

110, 173, 175
Manoeuvring aids (recommendations)

109
Map reading lamps

62
Markings, identification

202
Massage function

46
Mat

62, 110
Menu, main

28
Menus (audio)

205, 214–215, 228–229
Menu, shortcuts

28–29
Messages

246
Messages, quick

246
Minimum traction battery charge level
(Electric)

23
Mirror, rear view

48
Mirrors, door

48, 58, 131
Mirror, vanity

59
Misfuel prevention

153
Mobile application

30, 58, 163
Motor, electric

98, 171, 201
Mountings, ISOFIX

87, 90–91
Multimedia support

60