2021 CITROEN C4 AIRCROSS check engine

29
Screen 1 Screen 2Cause Solution - ActionObservations
Engine oil level not correct (below
minimum level or above maximum
level).Stop the vehicle as soon as it is
safe to do so.
Check the level with the dipstick and
top-up if the level low.
If the level is above the maximum
mark, do not restart the engine and
contact a CITROËN dealer or a
qualified workshop.Never drive with an incorrect oil
level.
* * Presence of water in the
d
i
esel fuel
f i l t e r. Risk of damage to the injection
system on Diesel engines.Contact a CITROËN dealer or a
qualified workshop as soon as
possible.
The ambient temperature is at or
below 3 °C (37 °F). There may be black ice on the road.
Take care and drive gently.
The clutch pedal is not depressed
while starting the engine. Depress the clutch pedal to start the
engine.For vehicles fitted with a manual
gearbox.
The gear lever is not in position P or
position N when starting the engine. Place the gear lever at position P to
start the engine.For vehicles fitted with a CVT
gearbox.
The brake pedal is not pressed
while starting the engine. Press the brake pedal to start the
engine.
* Depending on country of sale.
1
Monitoring

81
In order for these systems to be fully effective, follow the operation and maintenance
guidelines below:
F
T
o obtain an even air distribution, take care not to obstruct the exterior air intake grilles
located at the base of the windscreen, the nozzles, the vents and the air outlets, as well
as the air extractor located in the boot.
F

D
o not cover the sunshine sensor, located on the dashboard; this is used for regulation
of the air conditioning system.
F

O
perate the air conditioning system for at least 5 to 10 minutes, once or twice a month
to keep it in per fect working order.
F

E
nsure that the passenger compartment filter is in good condition and have the filter
elements replaced regularly.
W

e recommend the use of a combined passenger compartment filter. Thanks to its
special active additive, it contributes to the purification of the air breathed by the
occupants and the cleanliness of the passenger compartment (reduction of allergic
symptoms, bad odours and greasy deposits).
F

T
o ensure correct operation of the air conditioning system, you are also advised to have
it checked regularly as recommended in the maintenance and warranty guide.
F

I
f the system does not produce cold air, switch it off and contact a CITROËN dealer or a
qualified workshop.
Recommendations for ventilation and air conditioning
If after an extended stop in sunshine,
the interior temperature is very high, first
ventilate the passenger compartment for
a few moments.
Put the air flow control at a setting high
enough to quickly change the air in the
passenger compartment.
The air conditioning system does not
contain chlorine and does not present
any danger to the ozone layer.
The condensation created by the air
conditioning results in a discharge
of water under the vehicle which is
per fectly normal.
When towing the maximum load on a steep gradient in high temperatures, switching off the
air conditioning increases the available engine power and so improves the towing ability.
3
C

93
Front armrest
Pull the right-hand lever to open the storage
compartment lid, which serves as an armrest.
To close, fold down the lid until it locks.Pull the left-hand lever to open the lid.
To close, fold down the lid until it locks.
This storage compartment may contain up
to 3 accessory sockets.This operates when the ignition switch is in the
"LOCK", "ACC" or "ON" position.
Open the cover of the front armrest to gain
access to the socket.
Upper storage compartment
Lower storage compartment
Check that the electrical equipment
operates on 12 V and that its maximum
electrical power is 120 W.
The prolonged use of electrical
equipment without running the engine
may discharge the battery.
12 V socket
(120 W max)
3
Comfort

109
Emergency release
If the battery is discharged or if the gear lever
locking mechanism is damaged, it is possible
for the gear lever to be locked in position P,
even when you press the brake pedal firmly. However, if you have to move the vehicle,
release the gear lever using the following
procedure:
F

A
pply the parking brake.
F

S
witch off the engine if necessary.
F

R
emove the cap A, using a flat screwdriver
covered with a cloth.
F

P
ress the brake pedal firmly.
F

P
ut the ignition switch into position ACC
(ACC mode, if you vehicle has the Keyless
Entry and Starting system).
F

I
nsert the screwdriver into the aperture.
F

W
hile pushing the screwdriver downwards,
move the gear lever to position N .
You must contact a CITROËN dealer
or a qualified workshop to have the
system checked
.
4
Driving

110
Hill start assist
System which keeps your vehicle immobilised
temporarily (approximately 2 seconds) when
starting on a gradient, the time it takes to
move your foot from the brake pedal to the
accelerator pedal.
This function is only active when:
-
t
he vehicle is completely stationary, with
your foot on the brake pedal,
-

w
hen certain conditions of gradient
are met,
-

w
ith the driver’s door closed.
The hill start assist function cannot be
deactivated.
On an ascending slope, with the vehicle
stationar y, the vehicle is held for a brief
moment when you release the brake pedal:
-

i
f you are in first gear or neutral with a
manual gearbox,
-

i
f you are in position D with the CVT
gearbox.Operation
On a descending slope, with the vehicle
stationary and reverse gear engaged, the
vehicle is held for a brief moment when you
release the brake pedal.
Do not leave the vehicle while it is being
held in the hill start assist phase.
If you need to leave the vehicle while
the engine is running, apply the parking
brake.
Operating fault
If a fault occurs with the system, this warning
lamp comes on, accompanied by a message
in the instrument panel screen. Contact a
CITROËN dealer or a qualified workshop to
have the system checked.
When the engine is not running,
including periods on standby with
the Stop & Start (AS&G) system, the
function is not operative.
driving

113
The system is reactivated automatically
at every new start using the key or the
START/STOP button.
Reactivation
Press the "AS &G O FF " switch again.
The system is active again; this is confirmed by
the "AS &G O FF " warning lamp going off in the
instrument panel or instrument panel screen.
Operating fault
In the event of a malfunction with the system,
the "AS &G O FF " warning lamp flashes in the
instrument panel or instrument panel screen,
and the system no longer operates.
have it checked by a CITROËN dealer or a
qualified workshop. This system requires a specific
battery with a special specification
and technology (reference numbers
available from a CITROËN dealer or a
qualified workshop).
Fitting a battery not listed by CITROËN
introduces the risk of malfunction of the
system.
Maintenance
The "Auto Stop & Go" system makes
use of advanced technology. All work
on this type of battery must be done
only by a CITROËN dealer or a qualified
workshop.
In the event of a fault in STOP mode, the
vehicle may stall. The following warning lamps
come on in the instrument panel or instrument
panel screen:
It is then necessary to switch off the ignition,
then restart the engine using the key or the
START/STOP button.
4
Driving

188
Changing a fuse
The extraction tweezer and spare fuses are
fitted in the engine compartment fusebox.
To gain access to them:
F
O
pen the bonnet (refer to the "Checks"
section).
F

U
nclip the and remove the cover.
F

R
emove the tweezer.
F

C
arefully close the cover to ensure correct
sealing of the fusebox.
Access to the tools
Before changing a fuse, the cause of the failure
must be identified and rectified.
F

C
heck that the switch is in the " LOCK"
position or that the vehicle mode is " OFF".
F

I
dentify the failed fuse by checking the
condition of its filament.
F

U
se the special tweezer to extract the fuse
from its location.
F
a
l
ways replace the faulty fuse with a fuse
of the same rating.
F

C
heck that the number etched on the box,
the rating etched on the top and the tables
below all agree.
Changing a fuse
Good Failed
CITR
oËn
will not accept responsibility
for the cost incurred in repairing your
vehicle or for rectifying the malfunctions
resulting from the installation of
accessories not supplied and not
recommended by CITROËN and
not installed in accordance with its
instructions, in particular when the
consumption of all of the additional
equipment connected exceeds
10
mil

liamperes.
Your vehicle's electrical system is
designed to operate with standard or
optional equipment.
Before installing other electrical
equipment or accessories in your
vehicle, contact a CITROËN dealer or a
qualified workshop. The replacement of a fuse not
mentioned in the following tables may
cause a serious fault on your vehicle.
Contact a CITROËN dealer or a
qualified workshop.
Practical information

195
Check the electrolyte level and top up if
necessary (see "Checking levels").
Starting using another
battery
F Connect the red cable to the positive terminal (+) of the flat battery A , then to the
positive terminal (+) of the slave battery B. F
C onnect one end of the green or black
cable to the negative terminal (-) of the
slave battery B .
F

C
onnect the other end of the green or black
cable to the earth point C on your vehicle
(engine mounting).
F

O
perate the starter, let the engine run.
F

W
ait until the engine returns to idle and
disconnect the cables.
F

R

aise the protective cover on the (+)
terminal.
7
Practical information