2017 Citroen C4 AIRCROSS warning

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Under-inflation alert
The alert is given by the fixed
illumination of this warning lamp and
the display of a message.
F

R

educe speed immediately, avoid sudden
steering movements or harsh brake
applications.
F

S

top as soon as it is safe to do so. The loss of pressure detected does not
always lead to visible deformation of the
tyre. Do not rely on just a visual check. The alert is maintained until the
reference pressure is reinitialised after
the inflation, repair or replacement of
the tyres concerned. In the event of
the repair or replacement of tyres, the
sensor identifiers must be registered in
the system by a CITROËN dealer or a
qualified workshop.
The spare wheel does not have
a sensor, so there is no need to
reinitialise the system for driving with
the spare wheel fitted.
F
I f you have a compressor (the one in the
temporary puncture repair kit, for example),
check the four tyre pressures when cold.
I

f it is not possible to check the tyre
pressures immediately, drive carefully at
reduced speed.


or
F

I
n the event of a puncture, use the
temporary puncture repair kit or the spare
wheel (depending on equipment).
Reinitialising the reference
pressure
Before reinitialising the system, ensure
that the pressures in the four tyres are
suitable for the conditions of use of the
vehicle and are as specified on the tyre
pressure label.
The under-inflation detection system
cannot warn of an incorrect pressure at
the time of reinitialisation.
The system must be reinitialised after any
adjustment of tyre pressures and after
changing one or more wheels.
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Driving

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The reinitialisation instruction is entered in
the screen menu, with the ignition in the "ON"
position and the vehicle stationary.
F Press several times on the INFO button,
located below the instrument panel to the
left of the steering wheel.
F
Select "REINITIALISE" (located in
menu
2/3 or 3/3 depending on the
instrument panel) .
F

P
ress and hold the INFO button for at least
3 seconds to reinitialise the under-inflation
detection system.
Reinitialisation of the system is confirmed
by the flashing of the warning lamp in the
instrument panel. The under-inflation alert is only reliable
if the system has been reinitialised
with the four tyre pressures correctly
adjusted.
Operating fault
The flashing and then fixed illumination of the
under-inflation warning lamp accompanied by
the display of a message indicates a fault with
the system.
In this case, monitoring of the tyre pressures is
not assured.
This alert is also displayed if:
-

a
t least one wheel is not fitted with a
sensor (spare wheel in use),
-

a w
ireless device operating on the same
frequency is close to the vehicle,
-

t
here are accumulations of snow or ice in
the wings or wheels,
-

t
he state of charge of the tyre pressure
monitoring system battery is too low,
-

t
he wheel sensor identifiers have not been
memorised in the system by a CITROËN
dealer or a qualified workshop. Any tyre repair or replacement on a
wheel fitted with this system must be
carried out by a CITROËN dealer or a
qualified workshop.
If you fit the second set of tyres
memorised in the system, a fault will
be signalled until the second set is
selected in the configuration menu. Go to a CITROËN dealer or a qualified
workshop to have the system checked
or, after a puncture, to have the original
wheel, equipped with a sensor, refitted.
Driving

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Managing sets of tyres
If you have had a second set of tyres registered
by a CITROËN dealer or a qualified workshop,
every time you change the set of tyres (fitting
a set of winter tyres, for example), you must
select the set you have just fitted in the
configuration menu.After fitting the new set of tyres, you
should check and adjust the tyre
pressures to the values specified on the
tyre pressure label.
For more information on Identification
markings and in particular the
tyre pressure label, refer to the
corresponding section. Selection of the other set of tyres is done via
the menu screen, with the ignition on and the
vehicle stationary.
F

P
ress several times on the INFO button to
select the menu for managing sets of tyres
(located in menu 3/3) .
F Press and hold the INFO button for at least
3 seconds to change successively from
set of tyres 1 to set of tyres 2 or the other
way round. The system automatically reinitialises
the reference pressure based on the
pressure in the new set (the under-
inflation detection warning lamp flashes
during the operation).
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Driving

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General safety recommendations
Depending on the legislation in force in
the country, certain safety equipment
may be compulsory: high visibility
safety vests, warning triangles,
breathalysers, spare bulbs, spare fuses,
fire extinguisher, first aid kit, mud flaps
at the rear of the vehicle...
Labels are applied at various
points on your vehicle. They carry
safety warnings as well as vehicle
identification information. Do not
remove them: they form an integral part
of your vehicle.
For any work on your vehicle, use
a qualified workshop that has the
technical information, skills and
equipment required, all of which a
CITROËN dealer is able to provide.
We draw your attention to the
following points:
- The fitting of electrical equipment
or accessories not listed by
CITROËN
may cause excessive
current consumption and faults and
failures with the electrical system of
your vehicle. Contact a CITROËN
dealer for information on the range of
recommended accessories.
-

A
s a safety measure, access to
the diagnostic socket, used for
the vehicle's electronic systems,
is reserved strictly for CITROËN
dealers or qualified workshops,
equipped with the special tools
required (risk of malfunctions of the
vehicle's electronic systems that
could cause breakdowns or serious
accidents). The manufacturer cannot
be held responsible if this advice is
not followed.
-

A
ny modification or adaptation
not intended or authorised
by Automobiles CITROËN or
carried out without meeting the
technical requirements defined
by the manufacturer would lead
to the suspension of the legal and
contractual warranties.
Installation of accessory
radio communication
transmitters
Before installing a radio communication
transmitter, you must contact a
CITROËN dealer for the specification
of transmitters which can be fitted
(frequency, maximum power,
aerial position, specific installation
requirements), in line with the Vehicle
Electromagnetic Compatibility
Directive
(2004/104/EC).
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Safety

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Direction indicators
F Left: lower the lighting control stalk passing the point of resistance.
F

R
ight: raise the lighting control stalk
passing the point of resistance.
Three flashes of the direction indicators
F Press briefly upwards or downwards, without going beyond the point of resistance; the
direction indicators will flash 3 times.
Hazard warning
lamps
Visual warning with all of the direction
indicators flashing to alert other road users to a
vehicle breakdown, towing or accident.
F

P
ress this button, all of the direction
indicators flash.
They can operate with the ignition off.
Automatic operation of
hazard warning lamps
When braking in an emergency, depending on
the deceleration, the hazard warning lamps
come on automatically.
They switch off automatically the first time you
accelerate.
F

Y
ou can also switch them off by pressing
the button.
Horn
F Press the central part of the steering wheel.
Safety

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Group of supplementary systems which help
you to obtain optimum braking in complete
safety in emergency situations:
-
a
nti-lock braking system (ABS),
-

e
lectronic brake force distribution (EBFD).
Braking assistance systems
Anti-lock braking system
and electronic brake force
distribution
Linked systems which improve the stability and
manoeuvrability of your vehicle when braking,
in particular on poor or slippery sur faces.
Activation
The anti-lock braking system is active if the
vehicle speed is higher than 6 mph (10 km/h).
It is deactivated when the vehicle speed falls
below 3 mph (5 km/h).
The anti-lock braking system comes into
operation automatically when there is a risk of
wheel lock.
Normal operation of the ABS may make itself
felt by slight vibration of the brake pedal.
Operating fault
When the vehicle is stationary
If this warning lamp comes on, accompanied by
the indication on the instrument panel screen, it
indicates a malfunction of the anti-lock braking
system which could result in a loss of control of
the vehicle when braking.
The vehicle retains normal braking.
Drive carefully at moderate speed and contact
a CITROËN dealer or a qualified workshop as
soon as possible.
When braking in an emergency, press
very firmly without releasing the
pressure. The warning lamp comes on for a few
seconds when the ignition is switched on
(ON position). If it does not switch off or
does not come on, contact a CITROËN
dealer or a qualified workshop.
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Safety

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When the vehicle is moving
If this warning lamp comes
on continuously it indicates a
malfunction of the anti-lock braking
system which could result in a loss of
control of the vehicle on braking.
The two warning lamps comes on at the
same time and the two warnings are
displayed alternately in the instrument
panel screen.
When replacing wheels (tyres and
rims), ensure that they conform to the
manufacturer's recommendations.
The vehicle retains normal braking.
Drive carefully at moderate speed and contact
a CITROËN dealer or qualified workshop as
soon as possible.
If these two warning lamps come on, linked
with the warnings on the instrument panel
screen, they indicate a malfunction of the
electronic brake force distribution which could
result in a loss of control of the vehicle on
braking.
You must stop as soon as it is safe to do so.
Contact a CITROËN dealer or a qualified
workshop.

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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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