tow CITROEN C4 2023 Service Manual

174
Practical information
Following prolonged operation of the
vehicle at very low speed or at idle, you
may, in exceptional circumstances, notice
water vapour coming from the exhaust while
accelerating. These emissions have no
impact on the vehicle’s behaviour and the
environment.
New vehicle
During the first few particle filter
regeneration operations, you may notice a
"burning" smell. This is perfectly normal.
Manual gearbox
The gearbox does not require any maintenance (no oil change).
Automatic gearbox
The gearbox does not require any maintenance (no oil change).
Drive selector
The drive selector does not require any maintenance.
Manual parking brake
If you notice excessive brake lever travel
or decreased effectiveness, the parking
brake must be adjusted, even between two
services.
This system must be checked by a CITROËN
dealer or a qualified workshop.
Electric parking brake
This system does not require any routine servicing. However, in the event of a
problem, do not hesitate to have the system
checked by a CITROËN dealer or a qualified
workshop.
For more information on the Electric
parking brake, refer to the
corresponding section.
Brake pads
Brake wear depends on the style of
driving, particularly in the case of vehicles
used in town, over short distances. It may be
necessary to have the condition of the brakes
checked, even between vehicle services.
Unless there is a leak in the circuit, a drop in the
brake fluid level indicates that the brake pads
are worn.
After washing the vehicle, moisture, or in wintry conditions, ice can form on the
brake discs and pads: braking efficiency may
be reduced. Gently dab the brakes to dry and
defrost them.
Brake disc/drum wear
For any information on checking brake
disc/drum wear, contact a CITROËN
dealer or a qualified workshop.
Wheels and tyres
The inflation pressure of all tyres, including the spare wheel, must be
checked on "cold” tyres.
The pressures indicated on the tyre pressure
label are valid for "cold" tyres. If you have driven
for more than 10 minutes or more than 6 miles
(10 kilometres) at over 31 mph (50
km/h), add
0.3 bar (30 kPa) to the values indicated on the
label.
Under-inflation increases energy
consumption. Non-compliant tyre
pressures cause tyres to wear prematurely
and have an adverse effect on the vehicle's
road holding - risk of accident!
Driving with worn or damaged tyres reduces the
braking and road holding performance of the
vehicle. Regularly check the condition of the
tyres (tread and sidewalls) and rims as well as
the presence of the valve caps.
When the wear indicators no longer appear set
back from the tread, the depth of the grooves is
less than 1.6 mm; replace the tyres as soon as
possible.
Using different size wheels and tyres from those
specified can affect the lifetime of tyres, wheel
rotation, ground clearance, the speedometer
reading and have an adverse effect on road
holding.
Fitting different tyres on the front and rear axles
can cause the ESC to mistime.

177
Practical information
7The system only registers AdBlue®
intermediate top-ups of 5

litres or more.
If the AdBlue® tank is completely empty
– which is confirmed by the message
“Top up AdBlue: Starting impossible ” – it is
essential to add at least 10
litres.
Top-up detection may not be instantaneous
after addition. It may take a few minutes of
driving before the top-up detection is effective.
Changing to free-wheeling
In certain situations, it is necessary to put the
vehicle into free-wheeling mode (e.g. towing, on
a rolling road, automatic car wash (Wash mode),
rail or sea transport).
The procedure varies according to the type of
gearbox and parking brake.
Never leave the vehicle unattended with
the vehicle into free-wheeling mode.
Keyless Entry and Start
You must not depress the brake pedal
while switching the ignition on again, then
switching it off. If you do, the engine will start,
requiring you to restart the procedure.
With a manual gearbox and
electric parking brake
/
To release them
► With the engine running and while depressing
the brake pedal, move the gear selector to the
neutral position.
►

While depressing the brake pedal, switch off
the engine.
►


Release the brake pedal, then switch on the
ignition.
►


While depressing the brake pedal, press the
control to release the parking brake.
►


Release the brake pedal, then switch off the
ignition.
Reverting to normal operation
► While depressing the brake pedal, restart the
engine and apply the parking brake.
With EAT8 automatic
gearbox or drive selector
and electric parking brake
/
Release procedure
► With the vehicle stationary and the engine
running, depress the brake pedal and select
mode
N.
Within 5 seconds:
► Depress and hold the brake pedal, then
observe this order: switch off the engine and
move the push selector forwards or backwards.
►

Release the brake pedal, then switch on the
ignition.
►


Place your foot on the brake and press the
electric parking brake control to release it.
►


Release the brake pedal, then switch off the
ignition.
A message is displayed on the instrument panel to confirm the unlocking
of the wheels for 15
minutes.
After 15 minutes or reverting to normal
operation
► While depressing the brake pedal, restart the
engine and select mode P .
Advice on care and maintenance
General recommendations
Observe the following recommendations to avoid
damaging the vehicle.

180
In the event of a breakdown
Warning triangle
This reflective and dismantable device is to be
installed on the side of the road when a vehicle
is broken down or damaged.
Before getting out of the vehicle
Turn on the hazard warning lamps, then
put on the safety vest to assemble and install
the triangle.
Storage
C4

C4 X

► Use the straps on the boot side trim or on the
tailgate to stow the folded triangle or its storage
box.
Assembling and placing the triangle


For versions supplied with a triangle as original
equipment, refer to the illustration above.
For other versions, refer to the assembly
instructions provided with the triangle.
►

Put the triangle in place behind the vehicle,
as required by local legislation.
Running out of fuel
(Diesel)
With Diesel engines, the fuel system must be
primed if you run out of fuel.
Before starting to prime the system, it is
essential to put at least 5 litres of Diesel into the
fuel tank.
For more information on Refuelling and
on Misfuel prevention (Diesel), refer to
the corresponding section.
1.5 BlueHDi engines
► Switch on the ignition (without starting the
engine).
►

W
ait around 1 minute and switch off the
ignition.
►

Operate the starter motor to start the engine.
If the engine does not start at the first attempt,
do not keep trying, but restart the procedure.
Tool kit
Set of tools supplied with the vehicle.
Its content depends on your vehicle's equipment:
–

T
emporary puncture repair kit.
–

Spare wheel.
Access to the tools
Depending on version, the tool kit is stored in a
bag or in a storage box in the boot.

181
In the event of a breakdown
8List of tools

1.Chock to immobilise the vehicle (depending
on equipment)
2. Socket for the wheel security bolts (located in
the glove box) (depending on equipment)
To adapt the wheelbrace to the special
‘security’ bolts.
3. Removable towing eye
For more information on Towing the vehicle
and using the removable towing eye, refer to the
corresponding section.
With temporary puncture repair kit

4. 12 V compressor with cartridge of sealant
and speed limit sticker
For temporary repair of a tyre and to adjust
the tyre pressure.
For more information on the Temporary
puncture repair kit, refer to the corresponding
section.
With spare wheel

5. Wheelbrace
For removing the wheel bolts.
6. Jack with integrated handle
To raise the vehicle.
7. Wheel bolt cap removal tool (depending on
equipment)
For removing the wheel bolt head finishers on
alloy wheels.
For more information on the Spare wheel, refer
to the corresponding section.
These tools are specific to the vehicle and may vary according to the level of
equipment.
Do not use them for any other purpose.
The jack must only be used to change a wheel with a damaged or punctured tyre.
Do not use any jack other than the one
supplied with the vehicle.
If the vehicle does not have its original jack,
contact a CITROËN dealer or a qualified
workshop to obtain the one that was intended
by the manufacturer.
The jack meets European standards, as
defined in the Machinery Directive 2006/42/
CE.
The jack does not require any maintenance.
Temporary puncture repair kit
Visit this link to view explanatory videos:
http://q-r.to/bagGl9
Made up of a compressor and a sealant
cartridge,
it allows you to carry out a temporary

182
In the event of a breakdown
repair of the tyre so that you can drive to the
nearest garage.
It is designed to repair most punctures located
on the tyre tread.
The vehicle's electric system allows the connection of the compressor to the 12 V
power supply for long enough to repair a tyre
after a puncture.
For more information on the Tool kit,
refer to the corresponding section.
Tyre inflation pressures are indicated on this label.
For more information on Identification
markings, particularly this label, refer to the
corresponding section.
Should the pressure of one or more tyres
be adjusted, it is necessary to reinitialise
the under-inflation detection system.
For more information on Tyre under-inflation
detection, refer to the corresponding section.
Repair procedure
Do not remove any foreign body
(e.g. nail, screw) which has penetrated
the tyre.
►

Park the vehicle without obstructing traffic
and apply the parking brake.
►


Follow the safety instructions (hazard
warning lamps, warning triangle, high visibility
jacket, etc.) according to the legislation in force
in the country in which you are driving.
►


Switch the ignition off.

► Remove the transparent cap from the bottle
of sealant.
►

Lift the protective cover before installing the
bottle of sealant on the compressor

.
►

T
urn the bottle of sealant over and screw it a
quarter turn into the compressor.
►

Remove the valve cap from the tyre to be
repaired, and place it in a clean place.


► Uncoil the pipe stowed under the compressor.
► Connect the pipe from the compressor to the
valve of the tyre to be repaired and tighten firmly
.
►

Check that the compressor switch is in
position

"O".
►

Fully uncoil the electric cable stowed under
the compressor

.
►

Connect the compressor's electric plug to the
vehicle's 12

V socket.
► Affix the speed limit sticker .
The speed limit sticker must be affixed
inside the vehicle in the area close to the
driver, to remind them that a wheel is in
temporary use.
►

Switch the ignition on.

183
In the event of a breakdown
8

► Switch on the compressor by moving the
switch to position "I" until the tyre pressure
reaches 2
bar. The sealant product is injected
under pressure into the tyre; do not disconnect
the pipe from the valve during this operation (risk
of blowback).
If after approximately 7 minutes, the
pressure of 2 bar is not reached, this
indicates that the tyre is not repairable;
contact a CITROËN dealer or a qualified
workshop for assistance.
►

Move the switch to position
"O".
►

Disconnect the compressor's electric plug
from the vehicle's 12

V socket.
►

Remove the kit.
►


Refit the cap on the valve.
►


Remove and store the bottle of sealant.
The sealant product is harmful if swallowed and causes irritation to the
eyes.
Keep this product out of the reach of children.
The use-by date of the fluid is marked on the
bottle.
After use, do not discard the bottle into the
environment; take it to a CITROËN dealer or
an authorised waste disposal site.
Do not forget to obtain a new bottle of
sealant, available from a CITROËN dealer or
a qualified workshop.


► Drive immediately for approximately 3 miles
(5 kilometres) at reduced speed (between
12 and 37
mph (20 and 60 km/h)) to plug the
puncture.
►

Stop to check the repair
and the tyre
pressure using the kit:
•

If the tyre pressure is incorrect, contact a
CITROËN dealer to have the tyre changed.
•


If the tyre pressure is correct, drive a second
time for approximately 3

miles (5 kilometres)
at reduced speed (between 12 and 37
mph
(20 and 60
km/h)), stop then check again
the tyre pressure using the kit to confirm the
effective repair of the tyre.
With a tyre repaired using this type of kit,
do not exceed a speed of 50 mph
(80 km/h) and do not drive more than
125 miles (200 km).
You must contact a CITROËN dealer or a
qualified workshop to have the repair checked
and the tyre changed.
Checking/adjusting tyre
pressures
The compressor can be used, without injecting
sealant, to check and, if necessary, adjust the
tyre pressures.
►

Remove the valve cap from the tyre and keep
it in a clean place.
►


Uncoil
the pipe stowed under the compressor.
►

Screw the pipe onto the valve and tighten
firmly

.
►

Check that the compressor switch is in
position " O

".
►

Fully uncoil the electric cable stowed under
the compressor

.
►

Connect the compressor's electric plug to the
vehicle's 12

V socket.
►

Switch the ignition on.
►


Start the compressor by placing the switch at
position " I

" and adjust the pressure to the value
shown on the vehicle's tyre pressure label. To
deflate: press the black button located on the
compressor pipe, near the valve connection.
If after 7 minutes the pressure of 2 bar is
not reached, the tyre is damaged;

184
In the event of a breakdown
contact a CITROËN dealer or a qualified
workshop for assistance.
►

Once the correct pressure is reached, put the
switch in position " O

".
►

Remove the kit and stow it.
►


Refit the cap on the valve.
Spare wheel
Visit this link to view explanatory videos:
http://q-r.to/bagGl9
For more information on the Tool kit,
refer to the corresponding section.
Accessing the spare wheel
C4

C4 X

The spare wheel is stored in the boot, under the
floor.
Depending on version, the spare wheel
may be a standard (steel or aluminium)
or 'space-saver' wheel.
Removing the spare wheel

► Slacken the central nut.
► Remove the fastening device (nut and bolt).
►

Lift the spare wheel towards you from the
rear

.
►

T
ake the wheel out of the boot.
Putting the spare wheel back in place
The punctured wheel cannot be put under the boot floor.


► Put the spare wheel back in place in its
housing.
►

Slacken the nut on the bolt by a few turns.

187
In the event of a breakdown
8After changing a wheel
With a "space-saver" type spare wheel
Deactivate certain driving aid functions
(Active Safety Brake, Adaptive cruise control,
etc.).
Do not exceed the maximum authorised
speed of 50 mph (80 km/h).
Driving with more than one "space-saver"
type spare wheel is prohibited.
Visit a CITROËN dealer or a qualified
workshop.
Have the tightening of the spare wheel's bolts
and its tyre pressure checked.
Have the punctured tyre examined. After
inspection, the technician will advise you on
whether the tyre can be repaired or if it must
be replaced.
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.
Never look too closely at the light beam
of LED technology lamps - risk of serious
eye injury!


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.
Light-emitting diode (LED)
headlamps and lamps
Depending on version, the affected types of
headlamps/lamps are:
–

LED technology headlamps.
–


Front foglamps.
–


Daytime running lamps/sidelamps.
–


Direction indicator side repeaters.
–


Side spotlamps.
–


Brake lamps.
–


Third brake lamp.
–


Rear sidelamps.
–


Rear direction indicators
–


Number plate lamps.

190
In the event of a breakdown
3.Direction indicators (LED)
4. Foglamp (P21W) or Reversing lamp (W16W)
Changing bulbs
C4
The bulbs are changed from inside the boot.
►

Open the boot.

► Remove the access flap on the
corresponding side trim: •

Press each of the notches in the upper part
of the flap to unclip it.
•


T
ilt the flap and its support then extract the
assembly.
►

Disconnect the lamp unit connector
.
►

Unlock the nut using a 10 mm pipe wrench
then unscrew and remove it. Be careful not to
drop it.
►


Dismantle the lamp unit and carefully extract
it, pulling it straight towards the outside.


► Unclip the bulb holder and remove it. Be
careful not to disconnect the wiring harness.
►

For the brake lamp, turn the bulb a quarter
turn and replace it.
►


For the reversing lamp and direction
indicator

, pull the bulb out and replace it.
Make sure to engage the lamp unit in its
guides while keeping it in line with the
vehicle.
Tighten sufficiently to ensure sealing, but
without damaging the lamp unit.
Foglamp (P21W)
C4

For access, pass your hand under the bumper
on the left-hand side.
►

T
urn the bulb holder a quarter turn to the left
and pull it out.
►

T
urn the bulb a quarter turn to the left and
pull it out.
►

Replace the bulb.

194
In the event of a breakdown
► Switch off all electricity-consuming devices
(audio system, wipers, lamps, etc.).
►

Switch off the ignition and wait for 4
minutes.
After accessing the battery, it is only necessary
to disconnect the (+) terminal.
Quick-release terminal clamp
Disconnecting the (+) terminal

► Depending on equipment, lift the plastic cover
on the (+) terminal.
►

Raise lever

A
fully to release clamp
B
.
►

Remove clamp

B
by lifting it off.
Reconnecting the (+) terminal

► Raise lever A fully.
► Refit open clamp B on the (+) terminal.
►

Push clamp
B fully down.
►

Lower lever

A
to lock clamp B.
►

Depending on equipment, lower the plastic
cover on the

(+) terminal.
Do not force the lever when pressing on
it, as if the clamp is not positioned
correctly, locking will then not be possible.
Start the procedure again.
Following reconnection
After reconnecting the battery, turn on the
ignition and wait 1 minute before starting the
engine, to enable the electronic systems to
initialise.
If minor problems nevertheless persist following
this operation, contact a CITROËN dealer or a
qualified workshop.
Referring to the relevant section, reinitialise
certain equipment:
–

Remote control key or electronic key
(depending on version).
–

Sunroof.
–

Electric windows.
–


Date and time.
–


Preset radio stations.
The Stop & Start system may not be operational during the trip following the
first engine start.
In this case, the system will only be available
again after a continuous period with the
vehicle immobilised, the duration of which
depends on the exterior temperature and the
state of charge of the battery (up to about 8
hours).
Towing the vehicle
General recommendations
Observe the legislation in force in the
country where you are driving.
Ensure that the weight of the towing vehicle is
higher than that of the towed vehicle.
The driver must remain at the wheel of the
towed vehicle and must have a valid driving
licence.