2020-2024 DS 9 4 Door Driving -> Active lane departure warning system User Manual
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Driving -> Active lane departure warning system for Your DS 9 4 Door First Generation (2020-2024)

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– Windscreen area in front of the camera dirty,  
misted up, frost-covered, snow-covered, damaged  
or covered by a sticker.  
Have it checked by a dealer or a qualified  
workshop.  
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.  
– Lane markings eroded, partially hidden (snow,  
mud) or multiple (roadworks, surface joints).  
– Travelling in a tight bend.  
Active lane departure  
warning system  
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).  
– Winding roads.  
For more information, refer to the General  
recommendations on the use of driving  
and manoeuvring aids.  
– Presence of a tarmac joint on the road.  
Risk of undesirable operation  
The system should be deactivated in the  
following situations:  
The system corrects the vehicle's trajectory by  
alerting the driver as soon as it detects a risk of  
involuntary lane departure.  
Operation  
– Driving with a "space-saver" type spare  
wheel.  
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  
correction necessary to restore the vehicle to its  
original lane.  
To do this, the system uses a camera, placed on  
the upper part of the windscreen, identifying the  
lane markings on the ground.  
– 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.  
This system is particularly useful on motorways  
and main roads.  
– Adverse weather conditions.  
– Driving on slippery road surfaces (risk of  
aquaplaning, snow, ice).  
The driver will notice a turning movement of the  
steering wheel.  
This warning lamp flashes during  
trajectory correction.  
– In roadworks or toll booth areas.  
– Driving on racing circuits.  
– Driving on a rolling road.  
The driver can prevent the correction by  
firmly holding the steering wheel  
Operating conditions  
– Vehicle speed between 43 and 112 mph (70 and  
(e.g. during an emergency manoeuvre).  
The correction is interrupted immediately if  
the direction indicators are operated.  
Malfunction  
180 km/h).  
In the event of a malfunction, the  
– Road marked with a central dividing line.  
– Steering wheel held in both hands.  
– Direction indicators not activated.  
– ESC system activated and operational.  
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.  
While the direction indicators are activated and  
for a few seconds after switching them off, the  
system considers that a change of trajectory is  
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intentional and no correction is triggered during  
this period.  
Driving situations and related alerts  
The table below describes the alerts and messages displayed in different driving situations.  
The actual order of display of these alerts may be different.  
Function status  
OFF  
Indicator lamp  
Display and/or associated  
message  
Comments  
Function deactivated.  
(grey)  
(grey)  
ON  
System active, conditions not met:  
– Speed below 43 mph (70 km/h).  
– No lane marking recognised.  
– ASR/DSC systems deactivated or operation of ESC  
system triggered.  
– "Sporty" driving.  
ON  
ON  
Automatic deactivation/standby of the function  
(e.g. detection of a trailer, use of the "space-saver" type  
spare wheel supplied with the vehicle).  
(grey)  
Lane marking detected.  
Speed above 43 mph (70 km/h).  
(green)  
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Function status  
ON  
Indicator lamp  
Display and/or associated  
message  
Comments  
The system corrects the trajectory on the side where the  
risk of unintentional crossing is detected (orange line).  
(orange)/(green)  
ON  
– During the trajectory correction, the system determines  
that the correction will not be enough: the driver is warned  
that they must provide additional trajectory correction.  
– 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 has grasped  
the steering wheel correctly.  
(orange)/(green)  
"Hold the wheel"  
The duration of audible warnings will increase if multiple  
corrections are performed in quick succession. The warning  
will become continuous, persisting until the driver responds.  
This message may also be displayed with your hands on the  
steering wheel.  
– Driving over lane markings.  
– Lane markings worn, hidden (snow, mud) or  
multiple (roadworks, etc.),  
Operating limits  
The system goes into standby automatically in  
– Activation of the direction indicators.  
– Crossing the inside line on a bend.  
– Driving on a tight bend.  
– Close proximity to the vehicle in front (lane  
markings may not be detected).  
the following cases:  
– ESC deactivated or operation triggered.  
– Speed below 43 mph (70 km/h) or greater than  
112 mph (180 km/h).  
– Inactivity by the driver detected during  
correction.  
– Roads that are narrow, winding.  
The following situations may interfere  
with the operation of the system or  
prevent it from working:  
Risk of undesirable operation  
– Electrical connection to a trailer.  
– Use of a"space-saver" spare wheel detected (as  
detection is not immediate, deactivation of the  
system is recommended).  
The system should be deactivated in the following  
situations:  
– Insufficient contrast between the road  
surface and the verge or hard shoulder  
(e.g. shade).  
– When changing a wheel or working near a  
wheel.  
– Dynamic driving style detected, pressure on the  
brake or accelerator pedal.  
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– Towing or with a bicycle carrier on a towing  
device, especially with trailer not plugged in or  
not approved.  
Have it checked by a dealer or a qualified  
workshop.  
The warning is given by a fixed warning lamp that  
appears in the door mirror on the side in question:  
– immediately, when being overtaken;  
– after a delay of about one second, when  
overtaking a vehicle slowly.  
– Road in poor condition, unstable or with very  
poor grip (risk of aquaplaning, snow, ice).  
– Adverse weather conditions.  
Blind spot monitoring  
For more information, refer to the General  
recommendations on the use of driving  
and manoeuvring aids.  
Activation/Deactivation  
– Driving on racing circuits.  
– Driving on a rolling road.  
It is set via the Driving/Vehicle touch  
screen menu.  
Deactivation/Activation  
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 the Manufacturer.  
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.  
►ꢀ Press this button to deactivate/reactivate the  
system at any time.  
Operating conditions  
– All vehicles are moving in the same direction  
Deactivation is signalled by the lighting of  
the indicator lamp in the button and this  
warning lamp in the instrument panel.  
The system is automatically reactivated every  
time the ignition is switched on.  
and in adjacent lanes.  
– The speed of your vehicle must be between  
7 and 87 mph (12 and 140 km/h) (versions without  
DS PARK PILOT) or between 19 and 87 mph  
(30 and 140 km/h) (versions with DS PARK PILOT).  
– When overtaking a vehicle, the speed  
difference is less than 6 mph (10 km/h).  
– When overtaken by a vehicle, the speed  
difference is less than 16 mph (25 km/h).  
– Traffic is flowing normally.  
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.  

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