2021 CITROEN C3 AIRCROSS cooling

9
Instruments
1If a warning lamp remains lit
The references (1), (2) and (3) in the warning
and indicator lamp description indicate whether
you should contact a qualified professional in
addition to the immediate recommended actions.
(1): You must stop the vehicle.
Stop as soon as it is safe to do so and switch off
the ignition.
(2): Contact a CITROËN dealer or a qualified
workshop.
(3): Visit a CITROËN dealer or a qualified
workshop.
List of warning and
indicator lamps
Red warning/indicator lamps
STOP
Fixed, associated with another warning lamp, accompanied by the display of a
message and an audible signal.
A serious fault with the engine, braking system,
power steering or a major electrical fault has
been detected.
Carry out (1) and then (2).
Parking brakeFixed.The parking brake is applied or not
properly released.
BrakingFixed.The brake fluid level in the braking circuit
has dropped significantly.
Carry out (1), then top up with fluid that complies
with the manufacturer's recommendations. If the
problem persists, carry out (2).
Fixed.The electronic brake force distribution (EBFD) system is faulty.Carry out (1) and then (2).
Door(s) openFixed, associated with a message identifying the access.
A door or the tailgate is not properly closed
(speed less than 6 mph (10 km/h)).
Fixed, associated with a message identifying the access, accompanied by
an audible signal.
A door or the tailgate is not properly closed
(speed above 6 mph (10 km/h)).
Seat belts not fastened / unfastened
Fixed or flashing, accompanied by an increasing audible signal.
A seat belt has not been fastened or has been
unfastened.
12 V battery chargeFixed.
The battery charging circuit has a fault
(dirty terminals, slack or cut alternator belt, etc.). Clean and retighten the terminals. If the warning
lamp does not go off when the engine is started,
carry out (2).
Engine oil pressureFixed.There is a fault with the engine lubrication
system.
Carry out (1) and then (2).
Maximum engine coolant temperatureFixed.The temperature of the cooling system is
too high.
Carry out (1), then wait until the engine has
cooled down before topping up the level, if
necessary. If the problem persists, carry out (2).
Engine self-diagnostics systemFixed.A major engine fault has been
detected.
Carry out (1) and then (2).
Orange warning/indicator lamps
Engine self-diagnostics system
Fixed.A minor engine fault has been
detected.
Carry out (3).
Flashing.The engine management system has a
fault.
There is a risk that the catalytic converter will be
destroyed.

44
Ease of use and comfort
Adjusting the temperature
► Turn the control from blue (cold) to red (hot) to adjust the temperature to your liking.
Adjusting the air flow
► Turn the knob 4 to obtain a comfortable air
flow.
Adjusting the air distribution
Central and side air vents.
Footwells.
Windscreen and side windows.
The air distribution can be adapted by
combining the corresponding buttons.
Air conditioning ON / OFF
The air conditioning is designed to operate
effectively in all seasons, with the windows
closed.
It enables you to:
– lower the temperature, in summer ,– increase the effectiveness of the demisting in winter, above 3°C.► Press this button to switch the air conditioning on/off.
The air conditioning does not operate
when the air flow adjustment is set to off.
Automatic air conditioning
The air conditioning operates with the engine
running, but the ventilation and its controls can
be accessed with the ignition on.
Operation of the air conditioning and regulation
of temperature, air flow and air distribution in the
passenger compartment are automatic.
Press the Climate menu button to access
the system controls.


1. Temperature adjustment
2. Air flow adjustment
3. Air distribution adjustment
4. Air conditioning on/off
5. Automatic comfort programme on/off
6. Recirculation of interior air
7. Access to the secondary page
Temperature adjustment
► Press one of the buttons 1 to increase (red)
or decrease (blue) the value.
The value displayed corresponds to a level of
comfort and not to a precise temperature.
For maximum cooling or heating of the
passenger compartment, press the
temperature setting button up or down until
LO or HI is displayed.
Automatic comfort programme
Activation/Deactivation
► Press button 5 to activate or deactivate the
air conditioning system’s automatic mode.
The air conditioning system operates
automatically: the system optimises the
temperature, air flow and air distribution in the
passenger compartment based on the comfort
level selected.
► Go to the secondary page by pressing button 7 to adjust the automatic comfort programme by
choosing one of the available settings.
“Soft”: provides soft and quiet operation by
limiting air flow.
“Normal”: offers the best compromise between
a comfortable temperature and quiet operation
(default setting).
“Fast”: provides strong and effective air flow.
Mode AUTO► To change the settings, press the button several times.
The setting is associated with AUTO mode only. However, when AUTO mode is deactivated, the
previous selection is retained.
Changing the setting does not reactivate AUTO
mode if this was deactivated.
In cold weather with the engine cold, the
air flow is increased gradually until the
comfort setting has been reached, in order to
limit the delivery of cold air into the passenger
compartment.
On entering the vehicle, if the interior
temperature is much colder or warmer than
the comfort setting requested, there is no
need to alter the value displayed to reach
the required level of comfort more quickly.
The system automatically corrects the
temperature difference as quickly as possible.
Air flow adjustment
► Press one of the buttons 2 (- or +) to increase
or decrease air flow.
The air flow symbol (a fan) is filled in according
to the request.
When the air flow is reduced to a minimum,
ventilation stops.
"OFF " is displayed alongside the fan.
Adjusting the air distribution
► Press the buttons 3 to adjust the air flow
distribution inside the passenger compartment.

45
Ease of use and comfort
3The setting is associated with AUTO mode only.
However, when AUTO mode is deactivated, the
previous selection is retained.
Changing the setting does not reactivate AUTO
mode if this was deactivated.
In cold weather with the engine cold, the
air flow is increased gradually until the
comfort setting has been reached, in order to
limit the delivery of cold air into the passenger
compartment.
On entering the vehicle, if the interior
temperature is much colder or warmer than
the comfort setting requested, there is no
need to alter the value displayed to reach
the required level of comfort more quickly.
The system automatically corrects the
temperature difference as quickly as possible.
Air flow adjustment
► Press one of the buttons 2 (- or +) to increase
or decrease air flow.
The air flow symbol (a fan) is filled in according
to the request.
When the air flow is reduced to a minimum,
ventilation stops.
"OFF " is displayed alongside the fan.
Adjusting the air distribution
► Press the buttons 3 to adjust the air flow
distribution inside the passenger compartment.
Windscreen.
Central and side air vents.
Footwells.
Each press on a button activates or deactivates
the function.
All three buttons can be activated simultaneously. In this case, priority is
given to the air flows from the central and side
air vents, and from those in the passenger
footwells.
Air conditioning on / off
The air conditioning system is designed to
operate effectively in all seasons, with the
windows closed.
It is used to:
– lower the temperature in summer ,– increase the effectiveness of the demisting in winter, above 3°C.
► Press button 4 to turn the air conditioning on/
off.
When the indicator lamp is on, the air
conditioning function is activated.
The air conditioning cannot operate when the air flow adjustment is set to OFF.
Ventilation function with the
ignition on
When the ignition is switched on, you can
use the ventilation system to adjust the air
flow settings and the air distribution in the
passenger compartment for a duration which
depends on the battery charge.
This function does not operate the air
conditioning.
Recirculation of interior air
The intake of exterior air helps avoid and
eliminate misting of the windscreen and side
windows.
Recirculating the interior air isolates the
passenger compartment from exterior odours
and fumes.
When required, this function also allows
faster heating or cooling of the air in the
passenger compartment.
► Press button 6 to recirculate the interior air or
allow the intake of exterior air.
Avoid prolonged use of interior air recirculation (due to the risk of misting
and deteriorating air quality).

86
Driving
Driving recommendations
► Observe the driving regulations and remain vigilant whatever the traffic conditions.► Monitor your environment and keep your hands on the wheel to be able to react to
anything that may happen any time.
► Drive smoothly, anticipate the need for braking and maintain a longer safety distance,
especially in bad weather.
► Stop the vehicle to carry out operations that require close attention (such as adjustments).► During long trips, take a break every two hours.
Important!
Never leave the engine running in a
closed space without sufficient
ventilation. Internal combustion engines emit
toxic exhaust gases such as carbon
monoxide. Danger of poisoning and death!
In severe wintry conditions (temperature
below -23°C), let the engine run for 4
minutes before moving off, to ensure the
correct operation and durability of the
mechanical components of your vehicle
(engine and gearbox).
Never drive with the parking brake
applied . Risk of overheating and
damage to the braking system!
Do not park the vehicle or leave the
engine running on a flammable
surface (dry grass, dead leaves, etc.). The
exhaust system of your vehicle is very hot,
even several minutes after the engine stops.
Risk of fire!
Never leave a vehicle unattended with
the engine running. If you have to leave
your vehicle with the engine running, apply
the parking brake and put the gearbox into
neutral or position N or P (depending on the
type of gearbox).
Never leave children inside the vehicle
unsupervised.
On flooded roads
We strongly advise against driving on flooded
roads, as this could cause serious damage to
the engine or gearbox, as well as to the electrical
systems of your vehicle.


If you are obliged to drive on a flooded road:
► check that the depth of water does not exceed 15 cm, taking account of waves that might be generated by other users,► deactivate the Stop & Start function,► drive as slowly as possible without stalling. In all cases, do not exceed 6 mph (10 km/h),► do not stop and do not switch off the engine.On leaving the flooded road, as soon as safety
conditions allow, make several light brake
applications to dry the brake discs and pads.
If in doubt about the state of your vehicle,
contact a CITROËN dealer or a qualified
workshop.
In case of towing
Driving with a trailer places greater
demands on the towing vehicle and
requires extra care from the driver.
Respect the maximum towable weights.
At altitude: reduce the maximum load by
10% per 1,000 metres of altitude; the density
of the air decreases with altitude and the
performance of the engine reduces.
New vehicle: do not pull a trailer before
having driven at least 620 miles (1,000
kilometres).
If the outside temperature is high, let the
engine idle for 1 to 2 minutes after the
vehicle comes to a stop, to help it to cool.
Before setting off
Nose weight
► Distribute the load in the trailer so that the heaviest items are as close as possible to the
axle and the nose weight (at the point where it
joins your vehicle) approaches the maximum
permitted without exceeding it.
Tyres
► Check the tyre pressures of the towing vehicle and of the trailer, observing the
recommended pressures.
Lighting
► Check the electrical signalling on the trailer and the headlamp beam height of your vehicle.
If a genuine CITROËN towing device is
used, the rear parking sensors will be
deactivated automatically to avoid the audible
signal.
When driving
Cooling
Towing a trailer uphill causes the coolant
temperature to increase. The maximum towable
load depends on the gradient and the exterior
temperature. The fan’s cooling capacity does not
increase with engine speed.
► Reduce speed and lower the engine speed to limit heating up.

87
Driving
6Before setting off
Nose weight
► Distribute the load in the trailer so that the heaviest items are as close as possible to the
axle and the nose weight (at the point where it
joins your vehicle) approaches the maximum
permitted without exceeding it.
Tyres
► Check the tyre pressures of the towing vehicle and of the trailer, observing the
recommended pressures.
Lighting
► Check the electrical signalling on the trailer and the headlamp beam height of your vehicle.
If a genuine CITROËN towing device is
used, the rear parking sensors will be
deactivated automatically to avoid the audible
signal.
When driving
Cooling
Towing a trailer uphill causes the coolant
temperature to increase. The maximum towable
load depends on the gradient and the exterior
temperature. The fan’s cooling capacity does not
increase with engine speed.
► Reduce speed and lower the engine speed to limit heating up.
In all cases, pay attention to the coolant
temperature.
If this warning lamp and the STOP
warning lamp come on, stop the vehicle
and switch off the engine as soon as possible.
Brakes
Braking distances are increased when towing a
trailer. To avoid overheating the brakes, the use
of engine braking is recommended.
Side wind
Bear in mind that the vehicle will be more
susceptible to wind when towing.
Anti-theft protection
Electronic immobiliser
The keys include an electronic engine
immobiliser system, whose secret code must be
recognised in order for starting to be possible.
If the system malfunctions, indicated by the
display of a message, the engine will not start.
Contact a CITROËN dealer.
For safety and theft protection reasons,
do not leave your electronic key in the
vehicle, even when you are close to it.
It is recommended that you keep it with you.
Starting / Switching off the
engine with the key
Key ignition switch

It has 3 positions:– 1. Stop : inserting and removing the key,
steering column locked.
– 2. Ignition : steering column unlocked, ignition
on, Diesel preheating, engine running.
– 3. Starting.
Avoid attaching heavy objects to the key or the remote control. It would weigh
down on its shaft in the ignition switch and
could cause a malfunction.
Ignition on position
It allows the use of the vehicle's electric
equipment or portable devices to be charged.
Once the state of charge of the battery drops to
the reserve level, the system switches to energy
economy mode : the power supply is cut off

130
Practical information
► Remove the roof bars once they are no longer needed.
Maximum load, distributed over the roof
bars, for a loading height not exceeding
40 cm:
– without longitudinal bars: 50 kg,– with longitudinal bars: 45 kg.
As this value may change, please verify the
maximum load quoted on the note supplied
with the roof bars.
If the height exceeds 40 cm, adapt the
speed of the vehicle to the profile of the road
to avoid damaging the roof bars and the
mountings on the vehicle.
Be sure to refer to national legislation in order
to comply with the regulations for transporting
objects which are longer than the vehicle.
Bonnet
Stop & Start
Before doing anything under the bonnet,
you must switch off the ignition to avoid any
risk of injury resulting from an automatic
change to START mode.
The location of the interior bonnet release lever prevents the bonnet being
opened when the left-hand front door is
closed.
When the engine is hot, handle the
exterior safety catch and the bonnet stay
with care (risk of burns), using the protected
area.
When the bonnet is open, take care not to
damage the safety catch.
Do not open the bonnet under very windy
conditions.
Cooling of the engine when stopped
The engine cooling fan may start after
the engine has been switched off.
Take care with objects or clothing that
could be caught in the blades of the fan!
Opening


► Open the left-hand front door .
► Pull the interior release lever, located at the bottom of the door frame, towards you.

► Tilt the safety catch to the left and raise the bonnet.

► Unclip the stay from its housing and place it in the support slot to hold the bonnet open.
Closing
► Hold the bonnet and pull out the stay from the support slot.
► Clip the stay in its housing.► Lower the bonnet and release it near the end of its travel.► Pull on the bonnet to check that it is locked correctly.
Because of the presence of electrical
equipment under the bonnet, it is strongly
recommended that exposure to water (rain,
washing, etc.) be limited.
Engine compartment
The engine represented is an example given for
illustration purposes only.
The locations of the following elements may
vary:
– Air filter.– Engine oil dipstick.– Engine oil filler cap.– Priming pump.
* Depending on engine.

131
Practical information
7► Clip the stay in its housing.► Lower the bonnet and release it near the end of its travel.► Pull on the bonnet to check that it is locked correctly.
Because of the presence of electrical
equipment under the bonnet, it is strongly
recommended that exposure to water (rain,
washing, etc.) be limited.
Engine compartment
The engine represented is an example given for
illustration purposes only.
The locations of the following elements may
vary:
– Air filter.– Engine oil dipstick.– Engine oil filler cap.– Priming pump.
* Depending on engine.
Petrol engine

Diesel engine

1. Screenwash fluid reservoir
2. Engine coolant reservoir
3. Brake fluid reservoir
4. Battery
5. Remote earth point (-)
6. Fusebox
7. Air filter
8. Engine oil filler cap
9.Engine oil dipstick
10. Priming pump *
The Diesel fuel system operates under
very high pressure.
All work on this circuit must be carried out
only by a CITROËN dealer or a qualified
workshop.
Checking levels
Check all of the following levels regularly in
accordance with the manufacturer's service
schedule. Top them up if required, unless
otherwise indicated.
If a level drops significantly, have the
corresponding system checked by a CITROËN
dealer or a qualified workshop.
The fluids must comply with the manufacturer's requirements and with
the vehicle's engine.
Take care when working under the bonnet, as certain areas of the engine
may be extremely hot (risk of burns) and the
cooling fan could start at any time (even with
the ignition off).

132
Practical information
Used products
Avoid prolonged contact of used oil or fluids with the skin.
Most of these fluids are harmful to health and
very corrosive.
Do not discard used oil or fluids into sewers or onto the ground.
Empty used oil into the containers reserved
for this purpose at a CITROËN dealer or a
qualified workshop.
Engine oil
The level is checked, with the engine having been switched off for at least 30
minutes and on level ground, either using the oil
level indicator in the instrument panel when the
ignition is switched on (for vehicles equipped
with an electric gauge), or using the dipstick.
It is normal to top up the oil level between two
services (or oil changes). It is recommended
that you check the level, and top up if necessary,
every 3,000 miles (5,000 km).
In order to maintain the reliability of the
engine and emissions control system,
never use additives in the engine oil.
Checking using the dipstick
For the location of the dipstick, please refer
to the illustration of the corresponding engine
compartment.
► Grasp the dipstick by its coloured grip and pull it out completely.► Wipe the end of the dipstick using a clean, lint-free cloth.

► Reinsert the dipstick and push fully down, then pull it out again to visually check the oil
level: the correct level is between marks A (max) and B (min).
Do not start the engine if the level is:
– above mark A: contact a CITROËN dealer or a
qualified workshop.
– below mark B: top up the engine oil
immediately.
Oil grade
Before topping up or changing the engine
oil, check that the oil is suitable for the engine
and complies with the recommendations in
the service schedule supplied with the vehicle
(or available from your CITROËN dealer and
qualified workshops).
Use of non-recommended oil may invalidate
the contractual warranty in the event of
engine failure.
Topping up the engine oil level
The location of the oil filler cap is shown in the
corresponding underbonnet layout view.
► Add oil in small quantities, avoiding any spills on engine components (risk of fire).► Wait a few minutes before checking the level again using the dipstick.► Add more oil if necessary .► After checking the level, carefully refit the oil filler cap and the dipstick in its tube.
During the 30 minutes after topping up
the oil, the check performed with the oil
level indicator in the instrument panel when
the ignition is switched on is not valid.
Brake fluid
The level of this fluid should be close to
the "MAX" mark. If not, check the brake
pad wear.
To know how often the brake fluid should be
replaced, refer to the manufacturer's servicing
schedule.
Clean the cap before removing it to refill.
Use only DOT4 brake fluid from a sealed
container.
Engine coolant
It is normal to top up this fluid between two services.
The check and top-up must only be done with
the engine cold.
A low level presents a risk of serious damage to
the engine.
The level of this fluid should be close to the
"MAX" mark but should never exceed it.
If the level is close to or below the " MIN” mark, it
is essential to top up.
When the engine is hot, the temperature of this
fluid is regulated by the fan.
As the cooling system is pressurised, wait at
least one hour after switching off the engine
before carrying out any work.
In order to avoid the risk of scalding if you need
to top up in an emergency, wrap a cloth around
the cap and unscrew the cap by two turns to
allow the pressure to drop.
Once the pressure has dropped, remove the cap
and top up to the required level.
Cooling of the engine when stopped
The engine cooling fan may start after
the engine has been switched off.
Take care with objects or clothing that
could be caught in the blades of the fan!
Screenwash fluid
Top up to the required level when necessary.