brake CITROEN C4 PICASSO 2022 Service Manual

168
These levels of alert are based on the inter-
vehicle time between your vehicle and the
vehicle in front.
They take account of the vehicle dynamics,
the speed of your vehicle and the one in front,
the environmental conditions, the operation of
the vehicle (cornering, pedals pressed, etc.) to
trigger the alert at the best moment.Level 1 (orange) : visual alert only,
signalling to you that the vehicle in
front is very close.
The message " Vehicle close" is
displayed.
Level 2 (red) : visual and audible
alert, warning you that a
collision is
imminent.
The message " Brake!" is displayed.
Where the speed of your vehicle is too fast
approaching another vehicle, the first level
of alert may not be displayed: the level
2
alert may be displayed directly.
Important: alert level 1
is never displayed
when the " Close" trigger threshold has
been selected.Intelligent emergency
braking assistance
If the driver brakes, but not sufficiently to avoid
a collision, this system will supplement the
braking, within the limits of the laws of physics.
This assistance will only be provided if you
press the brake pedal.
Active Safety Brake
This function, also called automatic emergency
braking, inter venes following the alert if the
driver does not react quickly enough and does
not operate the vehicle's brakes. It aims to reduce the speed of impact or avoid
a
frontal collision by your vehicle where the
driver fails to react.
Operation
The system operates under the following
conditions:
-

T
he vehicle's speed does not exceed
37
mph (60 km/h) when a pedestrian is
detected.
-

T
he vehicle's speed does not exceed
50
mph (80 km/h) when a stationary vehicle
is detected.
-

T
he vehicle's speed is between 6 mph and
53
mph (10 km/h and 85 km/h) (versions
with camera alone) or 87
mph (140 km/h)
(versions with camera and radar) when
a
moving vehicle is detected.If the camera and/or radar have
confirmed the presence of a
vehicle
or a
pedestrian, this warning lamp
flashes once the function is acting
on the vehicle's brakes.
With an automatic gearbox, in the event of
automatic emergency braking until the vehicle
comes to a
complete stop, keep the brake
pedal pressed down to prevent the vehicle from
starting off again.
With a
manual gearbox, in the event of
automatic emergency braking until the vehicle
comes to a
complete stop, the engine may stall.
Driving

169
The driver can maintain control of the
vehicle at any time by sharply turning
the steering wheel and/or pressing the
accelerator pedal.
Operation of the function may be felt by
slight vibration in the brake pedal.
If the vehicle comes to a complete stop,
the automatic braking is maintained for
1
to 2 seconds.
Malfunction
In the event of a fault with the
s ystem, you are alerted by the
illumination of this warning lamp,
accompanied by the display of
a


message and an audible signal.
Lane Departure Warning
System
Using a camera located at the top of the
w indscreen to identify lane markings on the
ground, the system corrects the trajectory of
the vehicle while alerting the driver if it detects
a
risk of involuntary crossing of a line.
This system is particularly useful on motor ways
and main roads.
Conditions for operation
The speed of the vehicle must be between
40 mph and 112 mph (65 km/h and 180 km/h).
The driver must hold the steering wheel with
both hands.
The change of trajectory must not be
accompanied by operation of the direction
indicators.
The ESC system must be activated and fault-
free. This system is a
driving aid that cannot,
in any circumstances, replace the
driver's own vigilance. The driver must
remain in control of the vehicle under all
circumstances.
The system helps the driver only when
there is a risk of the vehicle involuntarily
wandering from the lane it is being driven
in. It does not manage the safe driving
distance, the speed of the vehicle or the
brakes.
The driver must hold the steering wheel
with both hands in a way that allows
control to be maintained in circumstances
where the system is not able to inter vene
(if lane markings disappear, for example).
It is necessary to obser ve the driving
regulations and take a break every two
hours.Operation
Once the system identifies a risk of the vehicle
i nvoluntarily crossing one of the lane markings
detected, it makes the correction to the
trajectory required to return the vehicle to its
initial path.
The driver will notice a
turning movement of the
steering wheel.
This warning lamp flashes during
trajectory correction.
Contact a

CITROËN dealer or a

qualified
workshop to have the system checked.
6
Driving

172
Deactivation of the system is recommended in
the following situations:
-
d
riving on a road sur face in poor condition,
-
p

oor weather conditions,
-

d
riving on slippery sur faces (ice).
Activation/Deactivation
Activation and deactivation of the system is
done in the Driving menu of the touch screen.
Select the " Driving functions " then the "Lane
assist " tab.
The system state remains in memory when the
ignition is switched off.
Malfunction
Operating limits
The system goes into standby automatically in
the following cases:
-
E

SC deactivated or operation triggered,
-

s
peed below 40 mph (65 km/h) or greater
than 112
mph (180 km/h),
-
c

onnected electrically to a

trailer,
-

u
se of the "space-saver" spare
wheel detected (as detection is not
immediate, deactivation of the system is
recommended),
-

d
ynamic driving style detected, pressure on
the brake or accelerator pedal,
-
d

riving where there are no lane markings,
-
a

ctivation of the direction indicators,
-

c
rossing the inside line on a bend,
-

d
riving in a tight corner,
-

i
nactivity by the driver detected during
correction. The following situations may interfere with
the operation of the system or prevent it
working:
-

c
onditions of poor visibility (inadequate
street lighting, snowfall, rain, fog),
-

d
azzle (headlamps of an oncoming
vehicle, low sun, reflections on a
damp
road, leaving a
tunnel, alternating
shade and light),
-

w
indscreen area located in front of the
camera: dirty, misted, frost-covered,
snow-covered, damaged or covered by
a


s t i c ke r,
-

l
ane markings worn, hidden (snow,
mud) or multiple (roadworks, etc.),
-

r
unning close to the vehicle in front
(the lane markings may not be
detected),
-

r
oads that are narrow, winding, etc.
Risk of undesirable operation
The system is not intended for driving in the
following situations:
-
d
riving on a speed circuit,
-

d
riving with a trailer,
-

d
riving on a rolling stand,
-

d
riving on unstable sur faces.
In the event of a
fault with the system, you are
alerted by the illumination of these warning
lamps in the instrument panel, accompanied by
the display of a
message and an audible signal.
Have the system checked by a
CITROËN
dealer or a
qualified workshop.
Driving

181
Operation
Function activation
On display of the menu, select one of the three
views:
"Front camera".
"360 camera".
"Rear camera".
The selected view comes up in the instrument
panel.The display disappears from the
instrument panel above 9
mph (15 km/h).
Function deactivation
F Accelerate to over 19 mph (30 km/h). Check the cleanliness of the camera
lenses regularly.
High pressure jet wash
When washing your vehicle, keep the
nozzle at least 12
inches (30 cm) from the
cameras.
With the engine running:
F
I
n the Driving menu, select the "
Driving
functions " tab, then "Panoramic visual aid". or
F
I
n the Driving menu, select the "
Driving
functions " tab, then "Panoramic visual aid".
F
Sel
ect "Camera OFF".
Park Assist
This system provides active assistance with
parking: it detects a
parking space then
operates the steering system to park in this
space.
With a
manual gearbox , the driver manages
the accelerator, brakes, gears and clutch.
With an automatic gearbox (EAT6/EAT8) , the
driver manages the accelerator, brakes and
gears.
During phases of entry into and exit from
a
parking space, the system provides visual
and audible information to the driver in order
to make the manoeuvres safe. It may be
necessary to move for wards and backwards
more than once. The driver can take control at any time by
gripping the steering wheel.
This manoeuvring assistance system
cannot, in any circumstances, replace the
need for vigilance on the part of the driver.
The driver must remain in control of their
vehicle ensuring that the space remains
clear throughout the manoeuvre.
In some circumstances, the sensors may
not detect small obstacles located in their
blind spots.
The Park Assist system cannot work with
the engine off.
A. Parallel parking.
B. Exit from a


parallel parking space.
C. Bay parking.
The Park Assist system provides assistance for
the following manoeuvres:
6
Driving

191
Misfuel prevention (Diesel)
(Depending on the country of sale.)
Mechanical device which prevents filling the
tank of a Diesel vehicle with petrol. It helps
avoid the risk of engine damage that can result
from filling with the wrong fuel.
Operation
It remains possible to use a fuel can to fill
t he tank.
In order to ensure a
good flow of fuel,
do not place the nozzle of the fuel can in
direct contact with the flap of the misfuel
prevention device and pour slowly. Travelling abroad
As Diesel fuel pump nozzles may be
different in other countries, the presence
of the misfuel prevention device may make
refuelling impossible.
Not all Diesel vehicles are fitted with
misfuel protection, so before travelling
abroad, we recommend that you check
with the CITROËN dealer network,
whether your vehicle is suitable for the
fuel pumps in the country in which you
intend to travel.
When a petrol filler nozzle is introduced into
the fuel filler neck of a Diesel vehicle, it comes
into contact with the flap. The system remains
closed and prevents filling.
Do not persist but introduce a Diesel type
filler nozzle.
Snow chains
In wintry conditions, snow chains
improve traction as well as the
behaviour of the vehicle when
braking.
Snow chains must be fitted only to the
front wheels. They must never be fitted to
"space-saver" type spare wheels.
Take account of the legislation in force in
your country on the use of snow chains
and the maximum authorised speed.
Installation tips
F If you have to fit the chains during a journey,
stop the vehicle on a flat sur face on the side
of the road.
F

A
pply the parking brake and position any
wheel chocks under the wheels to prevent
movement of your vehicle.
F

F
it the chains following the instructions
provided by the manufacturer.
F

M
ove off gently and drive for a few
moments, without exceeding 31
mph
(50


km/h).
F

S
top your vehicle and check that the snow
chains are correctly tightened.
It is strongly recommended that before
you leave, you practise fitting the snow
chains on a
level and dry sur face.
Avoid driving with snow chains on roads
that have been cleared of snow to avoid
damaging your vehicle's tyres and the
road sur face. If your vehicle is fitted with
alloy wheels, check that no part of the
chain or its fixings is in contact with the
wheel rim.
7
Practical information

199
Engine compartment
This engine is shown as an example.
The positions of the following elements may
change:
-
A
ir filter.
-

E
ngine oil dipstick.
-

E
ngine oil filler cap.
-
P

riming pump.
Petrol
Diesel
5.Fusebox.
6. A i r f i l t e r.
7. Engine oil dipstick.
8. Engine oil filler cap.
9. Remote earth point.
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 these levels regularly, in line with
the manufacturer's service schedule. Top them
up if necessary, unless other wise indicated.
If a
level drops significantly, have the
corresponding system checked by a
CITROËN
dealer or a
qualified workshop.
The liquid must comply with the
manufacturer's recommendations 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).
Used products
Avoid prolonged contact of used oil or
fluids with the skin.
Most of these fluids are harmful to health
or indeed very corrosive.
Do not discard used oil or fluids into
sewers or onto the ground.
Take used oil to a
CITROËN dealer or
a
qualified workshop and dispose of
it in the containers reser ved for this
purpose.
Engine oil level
The check is carried out either when
the ignition is switched in using the
oil level indicator in the instrument
panel for vehicles equipped with an
electric gauge, or using the dipstick.
*
D

epending on engine.
1. Screenwash and headlamp wash
reservoir.
2. Engine coolant reservoir.
3. Brake fluid reser voir.
4. Battery/Fuses.
7
Practical information

201
Brake fluid level
The fluid level should be close to the
"MA X" mark. If it is not, check the
brake pad wear.
Fluid specification
The fluid must conform to the manufacturer's
recommendations.
Coolant level
Check the coolant level regularly.
It is normal to top up the fluid
between two services.
The check and top-up must only be done with
the engine cold.
A low coolant level presents a
risk of serious
damage to your engine.
The coolant level should be close to the "MA X"
mark but should never exceed it.
If the level is close to or below the "MIN" mark,
it is essential to top up. To avoid the risk of scalding when 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.
The cooling fan may star t after
switching off the engine: take care
with articles and clothing that might be
caught by the fan blades.
Fluid specification
This fluid must conform to the manufacturer's
recommendations.
Screenwash/headlamp
wash level low
In the case of vehicles fitted with
headlamp washers, when the fluid
reser voir low level is reached this
warning lamp comes on in the
instrument panel, accompanied by
an audible signal and a


message.
The warning lamp comes on when the ignition
is switched on, or every time the stalk is
operated, until the reser voir is refilled.
The next time you stop, have the screenwash/
headlamp wash reser voir topped up.
Diesel fuel additive level
(Diesel with particle filter)
The additive reser voir low level is
indicated by fixed illumination of this
warning lamp, accompanied by an
audible signal and a
message that
the particle filter additive level is
too low.
To p p i n g u p
This additive must be topped up without delay
by a CITROËN dealer or a qualified workshop.
Level of AdBlue
An alert is triggered once the reser ve level is
reached.
To avoid the vehicle being immobilised as per
regulations, you must top up with AdBlue.
For more information on AdBlue and the SCR
system, and, in particular, topping up the tank,
refer to the corresponding section.
When the engine is hot, the temperature of the
coolant is regulated by the fan.
In addition, as the cooling system is
pressurised, wait at least one hour after
switching off the engine before carrying out any
work.
7
Practical information

203
Manual gearbox
The gearbox does not require any
maintenance (no oil change).
Automatic gearbox
The gearbox does not require any
maintenance (no oil change).
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.
Brake disc wear
For information on checking brake
disc wear, contact a CITROËN
dealer or a
qualified workshop.
Electric parking brake
This system does not require any
specific check. However, in the
event of a problem, 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.
Wheels and tyres
The pressure must be checked on
all tyres, including the spare wheel,
when the tyres are "cold", at least
once a
month and before a long
j o u r n ey. The pressures given 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 more than 31 mph (50 km/h),
0.3 bar (30 kPa) should be added to the values
given on the label.
Under-inflation increases fuel consumption.
Non-compliant tyre pressure causes premature
wear on tyres and has an adverse effect on the
vehicle's road holding – Risk of an accident!
Driving with worn or damaged tyres reduces
braking efficiency and control of the vehicle's
steering. Regular inspections of the condition
of tyres (tread and sides) and rims are
recommended as well as making sure that
valves are fitted.
Using different size wheels and tyres from
those specified can affect the lifetime of tyres,
wheel rotation, ground clearance and 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.
7
Practical information

204
Only use products recommended by
CITROËN or products of equivalent quality
and specification.
In order to optimise the operation of
components as important as those in the
braking system, CITROËN selects and
offers very specific products.
After washing the vehicle, dampness, or
in wintry conditions, ice can form on the
brake discs and pads: braking efficiency
may be reduced. Make light brake
applications to dry and defrost the brakes.
AdBlue® (BlueHDi engines)
To respect the environment and ensure
compliance with the Euro 6 standard, without
adversely affecting the per formance or fuel
consumption of Diesel engines, CITROËN
has taken the decision to equip its vehicles
with a
system that associates SCR (Selective
Catalytic Reduction) with a
Diesel particle filter
(DPF) for the treatment of exhaust gases.
SCR system
Using a fluid called AdBlue® that contains
urea, a catalytic converter turns up to 85%
of nitrogen oxides (NOx) into nitrogen and
water, which are harmless to health and the
environment.
The AdBlue
® is contained in
a
special tank holding about
17


litres.
Its capacity allows a

driving range of around
12,500

miles (20,000

km). An alert system is
triggered automatically once the reser ve level
is reached: you can then drive for a
further
1,500

miles (2,400

km) before the tank is
e m pt y. Once the AdBlue
® tank is empty, a system
required by regulations prevents starting
of the engine.
If the SCR system is defective, the level of
emissions from your vehicle will no longer
meet the Euro 6

standard: your vehicle
becomes polluting.
In the event of a

confirmed fault with the
SCR system, you must go to a
CITROËN
dealer or a

qualified workshop as soon
as possible: after a
running distance of
685

miles (1,100

km), a system will be
triggered automatically to prevent engine
starting.
In either case, a range indicator gives you
the distance you can travel before the
vehicle is immobilised.
For more information on the Warning and
indicator lamps and associated alerts,
refer to the corresponding section.
Freezing of the AdBlue
®
AdBlue® freezes at temperatures below
around -11°C.
The SCR system includes a
heater for the
AdBlue
® tank, allowing you to continue
driving in very cold conditions.
Practical information

209
F Park the vehicle without obstructing any traffic and apply the parking brake.
F

F
ollow the safety instructions (hazard
warning lamps, warning triangle, wearing
high visibility vest, etc.) according to the
legislation in force in the country where you
are driving.
F

S
witch off the ignition.
F

U
ncoil the pipe stowed under the
compressor. Avoid removing any foreign bodies which
have penetrated into the tyre.F
R
emove the valve cap from the tyre to be
repaired, and place it in a

clean area.
F
C
heck that the compressor switch is at the
" O " position.
F U ncoil fully the electric cable, stowed under
the compressor.
Only the 12
V socket located at the front of
the vehicle can be used.
F

A
ffix the speed limit sticker.
1.
12 V compressor, with built-in pressure
gauge.
2. Bottle of sealant, with built-in hose.
3. Speed limit sticker.
Repair procedure Composition of the kit
F Connect the pipe from the compressor to
the bottle of sealant.
F

T
urn the sealant bottle over and secure it in
the notch provided on the compressor. F

C
onnect the hose from the bottle of sealant
to the valve of the tyre to be repaired and
tighten firmly.
F

C
onnect the compressor's electric plug to
the vehicle's 12
V socket.
8
In the event of a breakdown