2017 Citroen C4 AIRCROSS ECU

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Associated systems which contribute to the directional stability of the vehicle within the limits of the laws of physics:
- t raction control (TCl) ,
-

a
ctive stability control (ASC).
Traction control and active stability control
Traction control optimises traction to prevent
wheel spin, by acting on the brakes of the
driving wheels and on the engine.
Active 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.Activation
These systems are activated automatically
each time the vehicle is started.
The illumination of this warning lamp
in the instrument panel indicates
that the ASC and TCL systems are
deactivated.
Deactivation
In exceptional conditions (starting a vehicle
which is bogged down, stuck in snow, on soft
ground, ...), it may be advisable to deactivate
the ASC system, so that the wheels can move
freely and regain grip.
This is indicated by the flashing of
this symbol on the instrument panel
screen.
Trajectory control systems
F Press this button, located to the left of the steering wheel, until the symbol appears in
the instrument panel screen.
Operation
They operate when the vehicle speed is higher
than 9 mph (15 km/h).
They come into operation in the event of a grip
or trajectory problem.
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ReactivationOperating fault
The illumination of one of these warning lamps
accompanied by a message in the instrument panel
screen indicates a malfunction of these systems.
Contact a CITROËN dealer or a qualified
workshop to have the ASC/ TCL systems
checked. The ASC/ TCL systems offer exceptional
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 depends on observation of the
manufacturer's recommendations on:
-
w heels (tyres and rims),
-

b
raking components,
-
el

ectronic components,
-

a
ssembly and repair procedures.
After an impact, have these systems
checked by a CITROËN dealer or a
qualified workshop.
F

P

ress this button again to reactivate the
ASC and TCL systems.
When the warning lamp goes off, this indicates
the reactivation of the ASC and TCL systems.
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Seat belts
Front seat belts
The front seat belts are fitted with a
pretensioning and force limiting system.
This system improves safety in the front
seats in the event of a front or side impact.
Depending on the severity of the impact, the
pretensioning system instantly tightens the seat
belts against the body of the occupants.
The pretensioning seat belts are active when
the ignition is on.
The force limiter reduces the pressure of the
seat belt on the chest of the occupant,
so improving their protection.
Fastening
F Pull the strap, then insert the tongue in the buckle A.
F

C
heck that the seat belt is fastened
correctly by pulling the strap.
Unfastening
F Press the red button on the buckle A .
Height adjustment
F To lower the attachment point, press the
control B and slide the fixing C down.
F

T
o raise the attachment point, press the
control B and slide the fixing C up.
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If the driver does not fasten their seat belt
within one minute after switching on the
ignition, the warning lamp flashes accompanied
by an intermittent audible signal and a display
on the instrument panel screen.
The warning lamp, the audible signal and the
display stop after approximately 90 seconds
and return until the driver fastens their
seat belt.
If the seat belt is unfastened while the vehicle
is moving , you are alerted by the same
warnings.
When the ignition is switched
on, this warning lamp comes on
accompanied by an audible signal for
a few seconds if the driver has not
fastened their seat belt.
Front seat belt not fastened /
u nfastened warning lamp
Front passenger's seat belt
Driver's seat belt
When the ignition is switched on, this
warning lamp comes on the centre
console panel.
It is accompanied by an audible signal for a few
seconds if the passenger has not fastened their
seat belt.
If the seat belt is unfastened while the vehicle
is moving , you are alerted by the same
warnings.
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Centre rear seat belt
The seat belt for the centre rear seat is fitted in
the roof.
It has three anchorage points and a reel.
Fastening the belt
F Pull out the belt and pass it through the belt guide A.
F

P
ull on the strap and insert the tongue B
into the left-hand buckle.
F

I
nsert the tongue C into the right-hand
buckle.
F

C
heck that each buckle has engaged by
pulling on the strap.
Unfastening and stowing the belt
F Press the red button on buckle C , and then
on the red button on buckle B .
F

G
uide the belt as it reels in, passing it
through the belt guide A .
F

S
tow the tongue C in the upper slot D and
the tongue B in the lower slot E .
Outer rear seat belts
Each outer rear seat is fitted with a three-point
inertia reel seat belt.
Fastening
F Pull the strap, then insert the tongue in the
buckle.
F

C
heck that the seat belt is fastened
correctly by pulling the strap.
Unfastening
F Press the red button on the buckle.
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Advice
The driver must ensure that passengers use
the seat belts correctly and that they are all
fastened before setting off.
Wherever you are seated in the vehicle,
always fasten your seat belt, even for short
journeys.
Do not interchange the seat belt buckles as
they will not fulfill their role fully.
The seat belts are fitted with an inertia reel
permitting automatic adjustment of the
length of the strap to your size. The seat belt
is stowed automatically when not in use.
Before and after use, ensure that the seat
belt is reeled in correctly.
The lower part of the strap must be
positioned as low as possible on the pelvis.
The upper part must be positioned in the
hollow of the shoulder.
The inertia reels are fitted with an automatic
locking device which comes into operation in
the event of a collision, emergency braking
or if the vehicle rolls over. You can release
the device by pulling the strap firmly and
then releasing it so that it reels in slightly.
Recommendations for children
Use a suitable child seat if the passenger is
less than 12 years old or shorter than one
and a half metres.
Never use the same seat belt to secure more
than one person.
Never allow a child to travel on your lap.
For more information on Child seats, refer
to the corresponding section.
In order to be effective, a seat belt must:
-
b
e tightened as close to the body as
possible,
-

b

e pulled in front of you with a smooth
movement, checking that it does not
twist,
-

b

e used to restrain only one person,
-

n

ot bear any trace of cuts or fraying,
-

n

ot be converted or modified to avoid
affecting its performance.
In the event of an impact
Depending on the nature and
seriousness of the impact , the
pretensioning device may be deployed
before and independently of the airbags.
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.
In all cases, the airbag warning lamp comes on.
Following an impact, have the seat belts
system checked, and if necessary replaced,
by a CITROËN dealer or a qualified
workshop.
In accordance with current safety
regulations, for all repairs on your vehicle's
seat belts, go to a qualified workshop with
the skills and equipment needed, which a
CITROËN dealer is able to provide.
Have your seat belts checked regularly by
a CITROËN dealer or a qualified workshop,
particularly if the straps show signs of
damage.
Clean the seat belt straps with soapy
water or a textile cleaning product, sold by
CITROËN dealers.
After folding or moving a seat or rear bench
seat, ensure that the seat belt is positioned
and reeled in correctly.
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Airbags
General information
System designed to contribute towards
improving the safety of the occupants (with
the exception of the rear centre passenger)
in the event of violent collisions. The airbags
supplement the action of the seat belts fitted
with force limiters (all except the centre rear
passenger belt).
If a collision occurs, the electronic detectors
record and analyse the front and side impacts
sustained in the impact detection zones:
-
i
n the case of a serious impact, the airbags
are deployed instantly and contribute
towards better protection of the occupants
of the vehicle (with the exception of the
rear centre passenger); immediately after
the impact, the airbags deflate rapidly so
that they do not hinder visibility or the exit
of the occupants,
-

i
n the case of a minor or rear impact or in
certain roll-over conditions, the airbags
may not be deployed; the seat belt
alone contributes towards ensuring your
protection in these situations.
The airbags do not operate when the
ignition is switched off.
This equipment will only deploy once.
If a second impact occurs (during the
same or a subsequent accident), the
airbag will not be deployed again. Deployment of one or more of the
airbags is accompanied by a slight
emission of smoke and a noise, due
to the activation of the pyrotechnic
cartridge incorporated in the system.
This smoke is not harmful, but sensitive
individuals may experience slight
irritation.
The noise of detonation associated with
the deployment of one or more airbags
may result in a slight loss of hearing for
a short time.
Impact detection zones
A. Front impact zone.
B. S
ide impact zone.
Front airbags
Deployment
The airbags are deployed, except the
passenger's front airbag if it is deactivated,
in the event of a serious front impact applied
to all or part of the front impact zone A , in
the longitudinal centreline of the vehicle on a
horizontal plane and directed from the front to
the rear of the vehicle.
The front airbag inflates between the front
occupant of the vehicle and the dashboard to
cushion their for ward movement. System which contributes toward improving
protection for the head and chest of the driver
and front passenger in the event of a front
impact.
The driver's airbag is fitted in the centre of the
steering wheel; the front passenger's airbag is
fitted in the dashboard above the glove box.
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Deactivation
Only the front passenger's airbag can be
deactivated:
F
i
nsert the key in the passenger's airbag
deactivation switch A,
F

t
urn it to the "OFF" position,
F

r
emove the key. This warning lamp comes on in the
centre console panel, when the
ignition is on and until the airbag is
reactivated. To ensure the safety of your child, the
passenger's airbag must be deactivated
when you install a "rear ward facing"
child seat on the front passenger seat.
Other wise, the child would risk being
seriously injured or killed if the airbag
were triggered.
If the airbag warning lamp and the
display come on continuously, do not
install a "rear ward facing" child seat on
the front passenger seat.
Contact a CITROËN dealer or a
qualified workshop without delay.
Reactivation
When you remove the "rear ward facing" child
seat, turn switch A to the "ON" position to
reactivate the airbag and so ensure the safety
of your front passenger in the event of an
impact.
The associated warning lamp goes off.
Operating fault
If this warning lamp comes on in the
instrument panel, accompanied by a
message, contact a CITROËN dealer
or a qualified workshop without delay
to have the system checked. The
airbags may no longer be deployed in
the event of a serious impact.
Safety