2023 CITROEN C3 ECU

10
Access
As a safety precaution, remove the key from the ignition when leaving the
vehicle, even for a short time.
Do not modify the electronic vehicle
immobiliser, as this might result in
malfunctions.
Remember to remove the key and turn the
steering wheel to engage the steering lock.
Central locking
Manual

► Push/pull this knob located on the driver's
door handle to lock/unlock the doors from inside
the vehicle.
When the doors are locked, the red indicator is
no longer visible.
The central locking does not take place if one of the doors is open.
Driving with the doors locked could make
it more difficult for the emergency
services to enter the vehicle in an emergency.
Automatic (anti-intrusion security)
The doors and boot lock automatically when
driving (speed above 4-5
km/h).
Back-up procedures
Lost keys, remote control
Visit a CITROËN dealer with the vehicle's
registration certificate, a personal identification
document and, if possible, the label bearing the
key code.
The CITROËN dealer will be able to retrieve the
key code and the transponder code required to
order a new key.
Central locking not
functioning
Use these procedures in the following cases:
– Central locking malfunction.
–

Battery disconnected or discharged.
In the event of a malfunction of the
central locking system, the battery must
be disconnected to ensure that the vehicle is
locked fully.
Driver's door
► Turn the key anticlockwise to lock it, or
clockwise to unlock it.
All doors
► Use the manual knob in the driver's door to
lock in the four doors and close the doors.
Changing the remote
control battery
Battery ref.: CR2032/3 Volts.

► Hold the key blank and pull the key top cover
in opposite direction.
►

Remove the discharged battery from its
housing.
►


Insert the new battery
, observing the polarity,
and clip the cover onto the housing.
Do not throw remote control batteries
away, as they contain metals that are
harmful to the environment. Take them to an
approved disposal point.

25
Safety
5Unlocking
► To unfasten the seat belt, press the red
button written “PRESS” on the buckle.
►
Allow the belt to retract and make sure the
webbing is not twisted.
T

wisted webbing would not allow smooth
retraction of the belt.
Seat belt not fastened/
unfastened alerts
It comes on in red in the instrument panel
once the system detects that a seat belt is
not fastened or is unfastened.
Advice
The driver must ensure that passengers use the seat belts correctly and that they
are all fastened before setting off.
Wherever seated in the vehicle, you must
always fasten the seat belt, even for short
journeys.
Do not interchange the seat belt buckles, as
they will not fulfil their role fully.
Before and after use, ensure that the seat belt
is reeled in correctly.
After folding or moving a seat or rear bench
seat, ensure that the seat belt is positioned
and reeled in correctly.
While fastening the seat belt ensure that strap
must pass over your chest and top of your
shoulder and not touch your face, neck, side
of your shoulder or pass under your arm.
An accident or sudden stop could damage
the seat belt, please have your seat belts
inspected by authorized dealers after an
accident or sudden stop.
Do not use a damaged seat belt which would
result in serious injury.
Installation
The lower part of the strap must be
positioned as low as possible on the pelvis.
The upper part must be positioned on the
shoulder.
In order to be effective, a seat belt:
–

must be tightened as close to the body as
possible;
–


must be pulled in front of you with a smooth
movement, ensuring that it is not twisted;
–


must only be used to secure one person;
–


must not show signs of tearing or fraying;
–


must not be changed or modified, in order
to avoid affecting its performance.
Do not wear your seat belt over hard or
breakable objects in your pockets or on your
clothing. If an accident occurs, objects such
as glasses, pens, etc. under the seat belt can
cause injury

.
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 child.
Never carry a child on your lap.
For more information on Child seats, refer to
the corresponding section.
Recommendations for pregnant
women
Pregnant women should use seat belts,
although specific recommendations about
driving should be made by the woman's
medical advisor. Remember that the lap
portion of the belt should be worn as low as
possible across the hips.
A pregnant woman should not wear the seat
belt across the stomach which would result in
serious injury to the fetus and/or the pregnant
mother.
Maintenance
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 the seat belts checked regularly by a
CITROËN dealer, particularly if the straps
show signs of damage.

26
Safety
Clean the seat belt straps with soapy water or
a textile cleaning product, sold by CITROËN
dealers.
Airbags
General information
The airbags have been designed to optimise the
safety of the occupants in the event of a violent
collision.
The airbags are supplementary restraint systems
(SRS) that help cushion the impact force to the
head and chest during severe frontal collisions.
The SRS includes Airbags, Seatbelts, Airbag
ECU, Collision sensors and SRS warning lamp.
Electronic detectors record and analyse the front
impacts sustained in the impact detection zones:
–
In the event of violent impact, the airbags
deploy instantly and help better protect the
occupants of the vehicle; immediately after the
impact, the airbags deflate rapidly in order not
to hinder the visibility or the possible exit of the
occupants.
–


In the event of a slight impact, a rear impact
and under certain rollover conditions, the airbags
may not deploy; only the seat belt helps to
protect you in these situations.
During a frontal crash, children could be fatally
injured if they are sitting on driver

’s lap/standing
very close to the dashboard, as the airbags exert
severe force levels during deployment.
The seriousness of the impact depends on the
nature of the obstacle and the speed of the
vehicle at the moment of collision.
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.
When one or more airbags are deployed,
the detonation of the pyrotechnic charge
incorporated in the system makes a noise and
releases a small quantity of smoke.
This smoke is not harmful, but sensitive
individuals may experience slight irritation.
The detonation noise associated with the
deployment of one or more airbags may result
in a slight loss of hearing for a short time.
The airbags will deploy irrespective of whether the seat belt is buckled or not. In
order to reduce the risk of SERIOUS INJURY
or DEATH, we recommend occupants to
always be buckled.
Front airbags

This system protects the driver and front
passenger in the event of a serious front impact,
in order to limit the risk of head and chest
injuries.
The driver's airbag is fitted in the centre of the
steering wheel; the front passenger airbag is
fitted in the dashboard above the glove box.
Deployment
1. Frontal collision Airbags may deploy during severe front
collision when the crash intensity is above
the threshold and the angle of impact is less
than or equal to 30 degrees with respect to
longitudinal axis of vehicle.
2. Collision with utility poles or trees Airbags may deploy when the vehicle hits
pole or tree with sufficient intensity to trigger
the airbag. The crash intensity should be
above the threshold to inflate the airbag.
3. Underride collision Airbags may deploy when the vehicle rides
under the trucks or vehicles with higher
ground clearance. The crash intensity should
be above the threshold to inflate the airbag.

28
Safety
Child seats

Warning label on the sun visor - Front
passenger airbag
NEVER use a rearward facing child restraint on a seat protected by an ACTIVE AIRBAG
in front of it, SERIOUS INJURY to the CHILD may occur.
Do not install a rear-facing child restraint
on the front passenger’s seat.
A child in a rear-facing child restraint could be seriously harmed if the
passenger's front airbag inflates. The inflated
airbag would be too close to the back of a
rear-facing child restraint.
An incorrectly installed child seat compromises the child's safety in the
event of an accident.
Ensure that there is no seat belt or seat belt
buckle under the child seat, as this could
destabilise it.
Remember to fasten the seat belts or the
harness of child seats, keeping the slack
relative to the child's body to a minimum,
even for short journeys.
When installing a child seat using the seat
belt, ensure that the seat belt is tightened
correctly on the child seat and that it secures
the child seat firmly on the seat of the vehicle.
Ensure that the head restraint is stored or
attached securely to prevent it from being
thrown around the vehicle in the event of
sharp braking. Refit the head restraint once
the child seat has been removed.
Additional protections
To prevent accidental opening of the
doors and rear windows, use the "Child lock".
Take care not to open the rear windows by
more than one third.
To protect young children from the rays of the
sun, fit side blinds on the rear windows.
As a safety precaution, do not leave:
–

a child alone and unattended in a vehicle,
–


a child or an animal in a vehicle which is
exposed to the sun, with the windows closed,
–


the keys within reach of children inside the
vehicle.

29
Safety
5Child restraint system
The suitability of each passenger's seat position for carriage of children and fitting of child restraint system is shown below. Whenever you carry children
up to 12 years of age, properly use the child restraints which conform t\
o AIS 072, the standard for child restraints, referring to the table.
Seating position (or other site)
MASS GROUP Front
passenger Rear outboard
LH* Rear centre Rear outboard
RH*Intermediate
outboard* Intermediate
centre
Group 0
Up to 10 kg X
U XXN.A N.A
Group 0+
Up to 13 kg X
U XXN.A N.A
Group 1
9 to 18 kg X
U XXN.A N.A
Group 2
15 to 25 kg X
U XXN.A N.A
Group 3
22 to 36 kg X
U XXN.A N.A
U Suitable for "universal" category restraints approved for use in this ma\
ss group.
Universal is the category in the AIS 072.
X Seat position not suitable for children in this mass group.
N.A Seat position not available for children in this mass group.
* Outboard indicate s window side seat.
ELR type belt
Install your child restraint system according to
the instructions provided by the child restraint
system manufacturer.
Make sure the seat belt is securely latched. Try to move the child restraint system in all
directions to make sure it is securely installed.

45
In the event of a breakdown
8► Tighten the spare wheel fixing screw by a few
turns.
After changing a wheel
The temporary spare wheel is only intended for temporary emergency use,
until the conventional wheel can be repaired
or replaced.
Continuous use of this spare can result in tire
failure and loss of control. Always observe
these precautions when using this spare:
–

Y

our vehicle will respond differently with
this temporary spare.
–

Do not exceed 80 km/h speed.
–


Replace this spare with a standard tire and
wheel as soon as possible.
–


Use of this spare will reduce ground
clearance.
–


Set the specified tire pressure indicated
on the tire information label located on the
driver's door lock pillar

.
–

Do not use tire chains on the temporary
spare. If you must use tire chains, rearrange
the wheels so standard tires and wheels are
fitted to the front axle.
–


The temporary spare wheel has a much
shorter tread life than the conventional

wheels
on your vehicle. Replace the tire as soon as
possible as the tread wear indicator appears.
The inflation pressure of the temporary spare
wheel should be checked at least monthly. At
the same time, check that the tire is stored
securely. If it is not, tighten it.
Note that two or more temporary spare
wheels should not be used on one vehicle
simultaneously.
Changing a bulb
In some weather conditions (e.g. low
temperature or humidity), misting on the
internal surface of the glass of the headlamps
and rear lamps is normal, and will disappear
after the lamps have been on for a few
minutes.
The headlamps have polycarbonate lenses with a protective coating:
–

Do not clean them with a dry or abrasive
cloth, nor with detergent or solvent
products.
–


Use a sponge and soapy water or a pH
neutral product.
–


When using a high-pressure washer on
persistent marks, do not keep the lance
directed towards the headlamps, lamps or
their edges for too long, so as not to damage
their protective coating and seals.
Changing a bulb must only be done with
the ignition off and after the headlamp /
lamp has been switched off for several
minutes - risk of serious burns!
Do not touch the bulb directly with your
fingers; use a lint-free cloth.
It is essential only to use anti-ultraviolet
(UV) type bulbs, so as not to damage the
headlamp.
Always replace a failed bulb with a new bulb
of the same type and specification. To avoid
lighting imbalance, replace the bulbs in pairs.
Refitting the lamp units
Perform the operations in the reverse
order to dismantling.
Opening the bonnet / Accessing the
bulbs
With the engine warm, proceed with caution -
risk of burns!
Take care with objects or clothing that could
be caught in the blades of the cooling fan -
risk of strangulation!
Halogen bulbs (Hx)
To ensure good quality lighting, check
that the bulb is correctly positioned in its
housing.

48
In the event of a breakdown
Changing a fuse
Access to the tools

The puller is located inside the engine fuse box.
► Open the bonnet.
►

Disengage the cover completely
.
►

T
ake the puller from its housing.
Changing a fuse
Before changing a fuse:
► Identify the cause of the fault and fix it.
►

Switch off all power consumption.
►


Identify the defective fuse using the current
allocation tables and diagrams.
T

o replace a fuse, it is essential to:
►

Use the special puller to extract the fuse
from its housing and check the condition of its
filament.
► Always replace the failed fuse with a fuse of
the same rating (same colour); use of a different
rating may cause malfunctions - risk of fire!
If the fault recurs soon after replacing a fuse,
have the electrical system checked by a
CITROËN dealer
.
The fuse allocation tables and the corresponding diagrams are available
from a CITROËN dealer.
The replacement of a fuse not shown in the allocation tables may cause a serious
malfunction of the vehicle. Contact a
CITROËN dealer.


Good
Faulty

Puller
Installing electrical accessories
The vehicle's electrical system is
designed to operate with standard or optional
equipment.
Before installing other electrical equipment
or accessories to your vehicle, contact a
CITROËN dealer.
CITROËN accepts no responsibility for
the cost incurred in repairing the vehicle
or for rectifying malfunctions resulting from
the installation of accessories not supplied or
not recommended by CITROËN and not
installed in accordance with its
recommendations, in particular when the
combined power consumption of all of the
additional equipment connected exceeds 10
milliamperes.
Dashboard fuses
The fusebox is placed in the lower dashboard
(right-hand side).
Access to the fuses

49
In the event of a breakdown
8► Unclip the cover by pulling at the top left, then
right.
Version 1
Fuse No. ColourRating (A) Functions
FF01 Red 10On-board diagnosis (OBD-II) / Spare connector
FF02 Yellow 20Body control and cluster module 1 (BCCM-1)
FF03 Green 30Body control and cluster module 2 (BCCM-2)
FF04 Yellow 20Body control and cluster module 3 (BCCM-3)
FF07 Blue 1512 V Socket
FF08 Ta n 5Cabin lamp / Spare connector
FF09 Blue 15Front wiper and washer
FF10 Ta n 5ECU's ignition
FF12 Ta n 5Airbag ECU
FF10 Ta n 5Switches ignition
FF Ta n 5Service
FF Red 10Service
FF Blue 15Service
FS01 Pink 30Body Control & Cluster Module 5 (BCCM-5)
Relays
Relay ColourRating (A) Functions
MICRO Brown 20Ignition Loads