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Safety -> Trajectory control systems (ASR/DSC) for Your Citroen C4 SUV Second Generation (2010-2018)

Safety  
Trajectory control systems  
Anti-slip regulation (ASR)  
and dynamic stability  
control (DSC)  
The anti-slip regulation (also known as traction  
control) optimises traction to prevent skidding  
of the wheels, by acting on the brakes of the  
driving wheels and on the engine.  
The electronic stability control acts on the  
brake of one or more wheels and on the engine  
to keep the vehicle on the trajectory required  
by the driver, within the limits of the laws of  
physics.  
Intelligent traction control  
system ("Snow motion")  
Depending on version, your vehicle has a  
system to help driving on snow: intelligent  
traction control.  
This system detects situations of difficult  
surface adhesion that could make it difficult to  
move off or make progress on deep fresh snow  
or compacted snow.  
In these situations, the intelligent traction  
control limits the amount of wheel slip to  
provide the best traction and trajectory control  
for your vehicle.  
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Deactivation  
The use of snow tyres is strongly  
recommended on surfaces offering low  
levels of adhesion.  
In extremely severe conditions (deep snow,  
mud, ...), if you are unable to move off, it may  
be useful to temporarily deactivate these  
systems so that the wheels can spin freely and  
allow the vehicle to move.  
Activation  
These systems are activated automatically  
each time the vehicle is started.  
They come into operation in the event of a grip  
or trajectory problem.  
F
Press this button, located near the steering  
wheel.  
If the indicator lamp in the button comes on, this  
indicates that these systems are deactivated.  
This is indicated by flashing of this  
warning lamp in the instrument panel.  
It is recommended that the systems be  
reactivated as soon as possible.  
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Safety  
Reactivation  
The trajectory control systems offer  
increased safety in normal driving, but  
this should not encourage the driver to  
take extra risks or drive at high speed.  
The correct functioning of these  
systems is assured provided that  
manufacturer's recommendations are  
observed on:  
These systems are reactivated automatically  
each time the ignition is switched back on or  
from 30 mph (50 km/h).  
F
Press this button again to reactivate them  
manually.  
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wheels (tyres and rims),  
braking components,  
electronic components,  
assembly and repair procedures.  
Operating fault  
After an impact, have these systems  
checked by a CITROËN dealer or a  
qualified workshop.  
The illumination of the indicator  
lamps in the instrument panel and  
in this button, accompanied by an  
audible signal and a message in the  
screen, indicates a fault with these  
systems.  
Have it checked by a CITROËN dealer or a  
qualified workshop.  
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