Safety -> Trailer stability assist (TSA) for Your DS 9 4 Door First Generation (2020-2024)

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Safety  
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(confirmed by this warning lamp flashing on the  
instrument panel).  
ASR/DSC  
The electronic stability control system (ESC) must  
not have any faults.  
These systems enhance safety during  
normal driving, but should not encourage the  
driver to take extra risks or drive at high speed.  
It is in conditions of reduced grip (rain, snow,  
ice) that the risk of loss of grip increases. It  
is therefore important for your safety to keep  
these systems activated in all conditions, and  
particularly in difficult conditions.  
The vehicle speed must be between 37 and 99  
mph (60 and 160 km/h).  
E-TENSE 4X4 360  
The dynamic stability control is optimised  
to be able to react later on this vehicle.  
If the system detects that the trailer is  
snaking, it applies the brakes to stabilise  
the trailer and reduces engine power, if necessary,  
to slow the vehicle (indicated by the flashing of  
this warning lamp on the instrument panel and  
the brake lamps coming on).  
Deactivation/Reactivation  
In exceptional conditions (starting a vehicle  
which is bogged down, stuck in snow, on soft  
ground, etc.), it may be advisable to deactivate  
the ASR system, so that the wheels can turn  
freely and regain grip.  
Correct operation of these systems depends  
on compliance with the manufacturer's  
recommendations relating to the wheels (tyres  
and rims), braking and electronic components,  
as well as the assembly and repair procedures  
provided by dealers.  
For information on weights and towed loads, refer  
to the Engine technical data and towed loads  
section or your vehicle’s registration certificate.  
To ensure safe driving with a Towing device, refer  
to the corresponding section.  
Reactivate the system as soon as the level of grip  
permits.  
In order to ensure that these systems remain  
effective in wintry conditions, the use of snow  
or all-season tyres is recommended. All four  
wheels must be fitted with tyres approved for  
your vehicle.  
The settings are changed via the Driving/  
Vehicle touch screen menu.  
Malfunction  
If a fault occurs, this warning lamp lights  
up on the instrument panel, accompanied  
by a message and an audible signal.  
To continue towing a trailer, reduce speed and  
drive carefully!  
Deactivation/reactivation is confirmed by the  
display of a message.  
The ASR system is reactivated automatically  
every time the ignition is switched on or at speeds  
over 31 mph (50 km/h).  
All tyre specifications are listed on the  
tyre/paint label. For more information  
on Identification markings, refer to the  
corresponding section.  
Have it checked by a dealer or a qualified  
workshop.  
Reactivation is manual below 31 mph (50 km/h).  
Malfunction  
The trailer stability control system  
provides an extra safety feature under  
normal driving conditions, when following the  
recommendations for use of trailers and  
current legislation in force in your country. It  
must not encourage the driver to take extra  
risks, such as using a trailer in unsuitable  
conditions of operation (e.g. excessive load,  
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.  
Trailer stability assist (TSA)  
When towing, this system reduces the risk of the  
vehicle or trailer snaking.  
Have it checked by a dealer or a qualified  
workshop.  
Operation  
The system is activated automatically when the  
ignition is switched on.  
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Safety  
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exceeded nose weight, worn or under-inflated  
tyres, faulty braking system) or driving at  
excessive speed.  
This system reduces the pressure of the seat belt  
on the chest of the occupant, thus improving their  
protection.  
Rear seat belts  
In certain cases, the system may not detect  
trailer snaking, particularly with a light trailer.  
When driving on slippery or poor surfaces, the  
system may not be able to prevent sudden  
trailer snaking.  
In the event of an impact  
Depending on the nature and seriousness  
of the impacts, the pyrotechnic device may  
trigger before and independently of airbag  
deployment. Deployment of the pretensioners  
is accompanied by a slight discharge of  
harmless smoke and a noise, due to the  
activation of the pyrotechnic cartridge  
incorporated in the system.  
Seat belts  
Inertia reel  
In all cases, the airbag warning lamp comes  
on.  
The seat belts are equipped with an inertia  
reel which allows the strap length to adjust  
automatically to the shape of the user. The seat  
belt returns to its storage automatically when it  
is not used.  
Each of the rear seats has a three-point seat belt  
with inertia reel.  
Following an impact, have the seat belt system  
checked, and if necessary replaced, by a dealer  
or a qualified workshop.  
The outer seats are fitted with a pyrotechnic  
pretensioning and force limiting system.  
For the centre seat, the buckle is held horizontally  
by an elastic strap if the centre seat belt is not  
being used.  
The inertia reels are fitted with a device which  
automatically locks the strap in the event of a  
collision, emergency braking or if the vehicle rolls  
over. It can be released by pulling the strap firmly  
and then releasing it so that it reels in slightly.  
Pyrotechnic pretensioning  
Front seat belts  
The front seat belts are fitted with a pyrotechnic  
Fastening  
►ꢀ Pull the strap, then insert the tongue into the  
pretensioning system and a force limiting system.  
buckle.  
This system improves safety in the event of a  
frontal or side impact.  
►ꢀ Check that the seat belt is fastened correctly  
by pulling on the strap.  
Depending on the severity of the impact, the  
pyrotechnic pretensioning system instantly  
tightens the seat belts against the body of the  
occupants.  
Unfastening  
►ꢀ Press the red button on the buckle.  
►ꢀ Guide the seat belt as it is reeled in.  
The pyrotechnic pretensioning seat belts are  
enabled when the ignition is on.  
Force limiting system