2021 CITROEN C4 AIRCROSS tyre pressure

117
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 (see the
"Identification markings" section). Selection of the other set of tyres is is done via
the menu screen, with the ignition on and the
vehicle stationary.
F

P
ress repeatedly 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).
4
Driving

119
As the engine torque is applied to all
four wheels, the condition of the tyres
has a considerable impact on the
per formance of the vehicle.
Ensure that all four tyres are in good
condition.
Avoid driving the vehicle in sandy or
muddy areas or in other areas in which
the wheels could spin.
Spinning the wheels places the
transmission components under
pressure and could cause a serious
malfunction.
Do not drive the vehicle through deep
water.
Avoid driving over excessively uneven
terrain (risk of scraping under the body
or of grounding on crossing a bridge).
Operating faults
If the selected transmission mode display
flashes, the vehicle switches automatically to
front "2WD" transmission mode.
It is then no longer possible to select the
transmission mode using the control A .
If the message "SLOW DOWN" is displayed on
the instrument panel, let the transmission cool
down then wait for the display to clear before
setting off again.
If "4WD" and "LOCK" are displayed alternately
and if "SERVICE REQUIRED" is displayed in
the instrument panel, the system has failed and
the safety system has been activated.
Contact a CITROËN dealer or a qualified
workshop without delay. Have your vehicle towed on a
flatbed.
The vehicle must not be towed with the
front or rear wheels on the ground even
if it is in front "2WD" (2 wheel drive)
mode.If the replacement of a tyre is
necessary on 4-wheel drive versions,
it is recommended that all four tyres be
replaced at the same time, ensuring
that the same make, model and size is
used on all wheels.
This is because using tyres of different
sizes, structure or rate of wear could
damage transmission components.
4
Driving

171
This kit is installed in the boot under the floor. Complete system consisting of a compressor and a sealant cartridge which permits the temporary
repair of a tyre so that you can drive to the nearest garage.
It is designed to repair most punctures which could affect the tyre, located on the tyre tread or
shoulder.
Temporary puncture repair kit
Access to the kit
For access to it:
F O pen the boot.
F

L
ift and remove the floor.
F

T
ake out the kit. The vehicle's electric system allows the
connection of a compressor for long
enough to inflate a tyre after a puncture
repair or for inflating a small inflatable
accessory.
Composition of the kit
1. 12 V compressor with integral pressure
gauge, to measure and adjust the tyre
pressure.
As the compressor is not sealed, keep it
away from sand, dust and water.
The puncture repair kit cannot be used
in the following circumstances:
-

t

he use-by date for the sealant
cartridge has been exceeded (see
the label on the cartridge),
-

m

ore than one tyre is punctured
while you have just one sealant
cartridge supplied with the kit,
-
t
he hole in the tyre exceeds 4 mm
in diameter,
-

t

he puncture is on the sidewall of
the tyre,
-

y

ou have continued to drive with a
flat tyre,
-

t

he bead of the tyre is detached
from the wheel rim,
-

t

he wheel rim is damaged.
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Practical information

173
F Connect the injection end-piece to the valve of the tyre to be repaired.
F

P
ress several times on the sealant
cartridge (top down) with your hand, to
inject all of the product into the tyre.
F

R
emove the injection end-piece
F

R
efit the valve core and tighten it using the
tool provided.
Take care, this product is harmful (e.g. ethylene-glycol, colophony...) if swallowed and
causes irritation to the eyes.
Keep it out of reach of children.
The use-by date of the sealant is marked on the cartridge.
After use, do not discard the empty cartridge but take it to a CITROËN dealer (France) or
an authorised waste disposal site.
Don't forget to obtain a replacement cartridge; they are available from a CITROËN dealer
or a qualified workshop. F

C
heck that the compressor switch A is at
the " OFF" position.
F

U
ncoil the compressor pipe B.
F

C
onnect this pipe to the valve of the
repaired wheel.
F

C
onnect the compressor's electric plug to
the vehicle's 12 V socket (ignition switch in
position "ACC" or ACC mode).
F

S
tart the compressor by turning the
switch
A to the "ON" position to inflate
the tyre to the pressure indicated on the
tyre pressure label (see the "Identification
markings" section).
Avoid removing any foreign bodies
which have penetrated into the tyre.
F
S
hake the sealant cartridge, remove the
cap and screw on the injection end-piece.
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Practical information

174
F If the specified pressure has not been reached after about 10 minutes, this means
that the tyre is not repairable; contact a
CITROËN dealer or a qualified workshop
for roadside assistance.
F

R
emove the compressor and stow the kit.Do not operate the compressor for more
than 10 minutes continuously.
If the compressor seems extremely
hot, switch it off and disconnect it
immediately. Leave it to cool for at least
30 minutes.
As soon as possible after a repair using
the kit, go to a CITROËN dealer or a
qualified workshop.
Tell the technician that you have used
the kit. After checking, the technician
will advise you whether the tyre can be
repaired or must be replaced.
If the vehicle is fitted with under-
inflation detection, the under-inflation
warning lamp remains on until the
system has been reinitialised (see the
"Under-inflation detection" section). F

A
ffix the speed limit sticker to the centre of
the steering wheel.
F

D
rive off straight away at reduced speed
(50 mph [80 km/h] max) to spread the
sealant product within the tyre. F

A
fter about 6 miles (10 km) or 5 minutes,
stop and check the repair and the tyre
pressure using the compressor. If the
pressure has dropped slightly, inflate the
tyre again to the specified figure. Carry
out the same check after another 6 miles
(10 km) or 5 minutes: if the pressure
has not held at the specified figure, this
indicates that the puncture repair has not
sealed; contact a CITROËN dealer or a
qualified workshop for roadside assistance.
I

f the pressure is correct, carefully tighten
the tyre valve cap. You can drive at
reduced speed (50 mph - 80 km/h max)
to go to a
CITROËN dealer or a qualified
workshop.
Practical information

179
Fitting a wheel
After changing a wheel
When using the "space-saver" spare
wheel, do not exceed a speed of
50 mph (80 km/h).
Have the tightening of the bolts and the
pressure of the spare wheel checked
by a CITROËN dealer or a qualified
workshop without delay.
Have the punctured wheel repaired and
replace it on the vehicle as soon as
possible.
List of operations
F Put the wheel in place on the hub.
F S crew in the bolts fully by hand.
F

P
re-tighten the security bolt using the
wheelbrace 1 fitted with the security
socket
5

(if your vehicle is equipped with
security wheel bolts).
F

P
re-tighten the other bolts using the
wheelbrace 1 o n l y.
Fitting snow tyres
If you equip your vehicle with snow
tyres fitted on steel wheel rims, special
bolts available from your CITROËN
dealer or a qualified workshop must
be used.
If the replacement of a tyre is
necessary on 4-wheel drive versions,
it is recommended that all four tyres be
replaced at the same time, ensuring
that the same make, model and size is
used on all wheels.
This is because using tyres of different
sizes, structure or rate of wear could
damage transmission components.
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Practical information

202
Driving advice
Distribution of loads
F Distribute the load in the trailer so that the heaviest items are as close as possible to
the axle and the nose weight approaches the
maximum permitted without exceeding it.
Air density decreases with altitude, thus
reducing engine per formance. Above
1
000 metres, the maximum towing load must
be reduced by 10
% of the GTW and so on for
every 1
000 metres of altitude.
Refer to the "Technical Data" section for details
of the weights and towing loads which apply to
your vehicle.
Side wind
F Take into account the increased sensitivity to side wind.
Cooling
Towing a trailer on a slope increases the
temperature of the coolant.
As the fan is electrically controlled, its cooling
capacity is not dependent on the engine speed.
F

T
o lower the engine speed, reduce your
speed.
The maximum towing load on a long slope
depends on the gradient and the outside
temperature.
In all cases, pay attention to the coolant
temperature.
F

I
f this message is displayed, stop your
vehicle as soon as it is safe to do so.
Braking
Towing a trailer increases the braking distance.
Ty r e s
F Check the tyre pressures of the towing vehicle and of the trailer, observing the
recommended pressures.
Lighting
F Check the lighting and signalling on the trailer.
If the message flashes slowly, wait for the
engine to cool before topping up the level, if
necessary.
If the message flashes rapidly, contact a
CITROËN dealer or a qualified workshop
without delay.
Practical information

235
Identification markingsVarious visible markings for the identification and tracing of your vehicle.
A.
M
anufacturer's plate.
I

t is riveted to the middle pillar, right hand
side and carries the following information:
-

t
he name of the manufacturer,
-

t
he European whole vehicle type
approval number,
-

t
he vehicle identification number (VIN),
-

t
he maximum authorised vehicle weight
(gross vehicle weight),
-

t
he maximum authorised weight of
vehicle + trailer (gross train weight),
-

t
he maximum front axle weight,
-

t
he maximum rear axle weight. The tyre pressures must be checked
when the tyres are cold, at least once
a month.
If the tyre pressures are too low, this
increases fuel consumption.
B.
T

yre label.
I

t is fixed to the middle pillar, driver's side
and carries the following information:
-

t
he tyre sizes,
-

t
he tyre pressures.C.
V

ehicle identification number (VIN)
under the bonnet.
T

his number is engraved on the body near
the damper support.
D.
V

ehicle identification number (VIN) at
the bottom of the windscreen aper ture.
I

t is marked on a label visible through the
windscreen, left hand side.
9
Technical data