brakes CITROEN RELAY 2020 Handbook (in English)

8
Instruments
Release the parking brake to switch off the
warning lamp, keeping your foot on the brake
pedal.
BrakingFixed.
The brake fluid level is too low.
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).
Orange warning/indicator lamps
Service
Temporarily on. One or more minor faults, for which there
is/are no specific warning lamp(s), have been
detected.
Carry out (2).
Fixed, accompanied by the display of a
message.
One or more major faults, for which there is/are
no specific warning lamp(s), have been detected.
Identify the cause of the fault using the message
displayed in the instrument panel, then carry out
(3).
Anti-lock braking system (ABS)Fixed.
The anti-lock braking system has a fault.
The vehicle retains conventional braking. Drive carefully at moderate speed, then carry
out (3).
Collision Risk Alert / Active Safety BrakeFixed, accompanied by the display of a
message.
The system has been deactivated via the vehicle
configuration menu.
Collision Risk Alert/Active Safety BrakeFlashing.
The system activates and brakes the
vehicle momentarily so as to reduce the speed of
collision with the vehicle ahead.
Fixed, accompanied by a message and
an audible signal.
The system has a fault.
Carry out (3).
Collision Risk Alert / Active Safety BrakeFixed.
The system has a fault.
If these warning lamps come on after the engine
is switched off and then restarted, carry out (3).
Brake pads
Fixed.
The front brake pads are worn.
Carry out (3) to replace the pads.
DSC / ASRFlashing.
The system is operating.
The system optimises traction and improves the
directional stability of the vehicle.
Fixed, accompanied by an audible signal and a message in the screen.
The DSC / ASR or hill start assist system has a
fault.
Carry out (2).
Fixed.
The Intelligent Traction Control has a
fault.
Carry out (2).
Particle filter (Diesel)Fixed.
The particle filter is regenerating itself.
Leave the engine running until the warning lamp
goes off so that regeneration can be completed.
Engine self-diagnostic systemFixed.
A fault with the engine or the EOBD
emissions control system has been detected.
EOBD (European On Board Diagnosis) is a
diagnostics system which complies with, among
others, the standards on emissions limits of:
– CO (carbon monoxide),
– HC (unburnt hydrocarbons),
– NOx (nitrogen oxides), detected by oxygen
sensors placed downstream of the catalytic
converters and
– particles.
Carry out (3) quickly.
Tyre under-inflation detectionFixed.
A tyre is deflated or punctured.
Carry out (1).
Change the wheel or repair the tyre.

52
Safety
Dynamic stability control
(DSC)
Switching on
The DSC system is activated automatically every
time the vehicle is started.
It comes into operation in the event of a grip or
trajectory problem.
This is indicated by the flashing of this warning lamp on the instrument panel.
Deactivation
This system cannot be deactivated by the driver.
Malfunction
The lighting of this warning lamp, accompanied by an audible signal and
confirmed by a message on the instrument panel
display, indicates a malfunction of the DSC
system.
Have the system checked by a CITROËN dealer
or a qualified workshop.
Anti-slip regulation (ASR)
Deactivation / Reactivation
The ASR system is activated automatically every
time the vehicle is started.
In exceptional conditions (starting a vehicle
which is bogged down, stuck in snow, on soft
ground, etc.), it may be advisable to deactivate
Electronic stability control
(ESC)
Electronic stability control (ESC: Electronic
Stability Control) integrating the following
systems:
– anti-lock braking system (ABS) and electronic
brake force distribution (EBFD),
– emergency braking assistance (EBA),
– wheel anti-slip regulation (ASR) or traction
control,
– dynamic stability control (DSC).
Definitions
Anti-lock braking system (ABS) and
Electronic brake force distribution
(EBFD)
This system improves the stability and handling
of your vehicle when braking and contributes
towards improved control on bends, in particular
on poor or slippery road surfaces.
ABS prevents wheel locking in the event of
emergency braking.
EBFD manages the braking pressure wheel by
wheel.
Emergency braking assistance (EBA)
In an emergency, this system enables you
to reach the optimum braking pressure more
quickly and therefore reduce the stopping
distance. It is triggered in relation to the speed at which
the brake pedal is depressed. The effect of this
is a reduction in the resistance of the pedal and
an increase in braking efficiency.
Anti-slip regulation (ASR)
The ASR system (also known as Traction
Control) optimises traction in order to limit
wheel slip, by acting on the brakes of the driving
wheels and on the engine. It also improves the
directional stability of the vehicle on acceleration.
Dynamic stability control (DSC)
If there is a difference between the path followed
by the vehicle and that required by the driver, the
DSC monitors each wheel and automatically acts
on the brake of one or more wheels and on the
engine to return the vehicle to the required path,
within the limits of the laws of physics.
Anti-lock braking system (ABS) and electronic brake
force distribution (EBD)
If this warning lamp comes on,
accompanied by an audible signal and a
message in an instrument panel screen, it
indicates a fault with the anti-lock braking system
(ABS) which could result in loss of control of the
vehicle when braking.
If these warning lamps come on,
accompanied by a message in the
instrument panel screen, it indicates a fault with
the electronic brake force distribution (EBFD)
system which could result in loss of control of the
vehicle when braking.
You must stop as soon as it is safe to do so.
In both cases, contact a CITROËN dealer or a
qualified workshop.
For maximum braking efficiency, a
bedding-in period of around 300 miles
(500 kilometres) is needed. During this
period, it is advisable to avoid any sudden,
repeated and prolonged braking.
The ABS does not provide shorter braking distances. On very slippery
surfaces (ice, oil, etc.) the ABS may extend
braking distances.
When changing wheels (tyres and rims),
ensure that these are approved for your
vehicle.
For emergency braking, press the
brake pedal very hard and do not
release it, even on a slipper surface; you
will then be able to continue steering the
vehicle to avoid an obstacle.
After an impact, have these systems checked by a CITROËN dealer or a
qualified workshop.

54
Safety
Engage a gear corresponding to the speed to
prevent the engine stalling.
► To manually deactivate the system, press the
button; the indicator lamp goes out.
The function may be unavailable if the brakes overheat. Wait a few minutes for
them to cool down before trying again.
Malfunction
When a malfunction of the Hill Assist
Descent Control system occurs, this
warning lamp lights up.
Have the system checked by a CITROËN dealer
or a qualified workshop.
Seat belts
Inertia reel
The seat belts are equipped with an inertia reel
which allows the strap length to automatically
adjust to your shape. The seat belt returns to its
storage automatically when it is not used.
The inertia reels are fitted with a device which
automatically locks the strap in the event of a
collision, emergency braking or if the vehicle rolls
over. It can be released by pulling the strap firmly
and then releasing it so that it reels in slightly.
Pyrotechnic pretensioning
This system improves safety in the event of a
frontal or side impact.
Activation/Deactivation
When starting the vehicle, this system is
deactivated.




► Press this button to activate/deactivate the
system.
When the button indicator lamp comes on, the
system is activated.
This system is active up to approximately 19
mph (30 km/h).
Above approximately 19 mph (30 km/h), the
system is automatically deactivated but the
button indicator lamp remains on.
The system is automatically reactivated as soon
as the speed returns below approximately 19
mph (30 km/h).
Malfunction
When a malfunction of the intelligent
traction control system occurs, this
warning lamp lights up.
Have the system checked by a CITROËN dealer
or a qualified workshop.
Load inertia control
The actual total weight of a commercial vehicle
can vary considerably depending on its load.
The centre of gravity of the vehicle can therefore
move in the longitudinal direction and even in
height.
Each of these variations has repercussions
on braking, traction, cornering behaviour and
overturning.
The load inertia control estimates the actual total
weight of the vehicle by analysing its behaviour,
during acceleration and braking phases.
This system then adapts the intervention of the
DSC and ASR systems according to the weight
distribution of the vehicle. In critical situations,
your vehicle therefore remains more safely on its
trajectory.
Hill Assist Descent
Control
Descent assistance system on roads with low
grip (mud, gravel, etc.) or with a steep gradient.
This system reduces the risk of the vehicle
slipping or running out of control as it moves
downhill.
It maintains the vehicle at a constant speed
during a descent by acting independently and
differentially on the brakes.
Activation / Deactivation
When starting the vehicle, the system is
deactivated.




► With the speed below 19 mph (30 km/h),
press this button to activate the system; the
button indicator lamp lights up.
When the vehicle begins its descent, you can
release the accelerator and brake pedals; the
button indicator lamp flashes.
The brake lamps automatically light up when the
function is activated.
If the speed exceeds 19 mph (30 km/h), the
system is automatically deactivated but the
button indicator lamp remains on.
The system is automatically reactivated as soon
as the speed returns below 19 mph (30 km/h).
You can depress the accelerator or brake pedal again at any time.
For the system to activate, the slope
must be greater than 8%.
Do not use the system with the gearbox in
neutral.

55
Safety
5Engage a gear corresponding to the speed to
prevent the engine stalling.
► To manually deactivate the system, press the
button; the indicator lamp goes out.
The function may be unavailable if the brakes overheat. Wait a few minutes for
them to cool down before trying again.
Malfunction
When a malfunction of the Hill Assist
Descent Control system occurs, this
warning lamp lights up.
Have the system checked by a CITROËN dealer
or a qualified workshop.
Seat belts
Inertia reel
The seat belts are equipped with an inertia reel
which allows the strap length to automatically
adjust to your shape. The seat belt returns to its
storage automatically when it is not used.
The inertia reels are fitted with a device which
automatically locks the strap in the event of a
collision, emergency braking or if the vehicle rolls
over. It can be released by pulling the strap firmly
and then releasing it so that it reels in slightly.
Pyrotechnic pretensioning
This system improves safety in the event of a
frontal or side impact.
Depending on the severity of the impact, the
pyrotechnic pretensioning system instantly
tightens the seat belts against the body of the
occupants.
The pyrotechnic pretensioning seat belts are
enabled when the ignition is on.
Force limiter
This system reduces the pressure of the seat
belt on the chest of the occupant, thus improving
their protection.
In the event of an impact
Depending on the nature and
seriousness of the impacts, the pyrotechnic
device may trigger before and independently
of airbag deployment. Deployment of the
pretensioners is accompanied by a slight
discharge of harmless smoke and a noise,
due to the activation of the pyrotechnic
cartridge incorporated in the system.
In all cases, the airbag warning lamp comes
on.
Following an impact, have the seat belt
system checked, and if necessary replaced,
by a CITROËN dealer or a qualified
workshop.
Front seat belts
The driver's seat is fitted with a pyrotechnic
pretensioner and a force limiter.
On versions with a front passenger airbag, the
passenger's seat is also fitted with a pyrotechnic
pretensioner and a force limiter.
The front bench seat is fitted with two seat belts.
If you install a front bench seat as an
accessory, it must be fitted with approved
seat belts.
Seat belts not fastened warning lamp
When the vehicle is started, this warning
lamp comes on, accompanied by an
increasing audible signal, if the driver and/or the
front passenger has not fastened their seat belt.
This alert works equally well for versions with an
individual passenger front seat as for versions
with a two-seat front bench seat.
Height adjustment

► On the driver's side or the side passenger
seat side, squeeze the control with the belt

66
Driving
Brakes
Braking distances are increased when towing a
trailer. To avoid overheating of the brakes, the
use of engine braking is recommended.
Side wind
Bear in mind the increased susceptibility to the
wind that the vehicle will have.
Anti-theft protection
Electronic immobiliser
The keys contain an electronic immobiliser
device.
This device locks the engine supply system. It
activates automatically when the key is removed
from the ignition.
When the ignition switch is turned on, a dialogue
is set up between the key and the electronic
immobiliser.
This warning lamp goes off after the key has been recognised, the ignition is
switched on and the engine can be started.
If the key is not recognised, the engine
cannot be started. Use another key and
have the faulty key checked by a CITROËN
dealer.
Carefully note the key number. In case of
loss, the intervention of a CITROËN
dealer will be faster and more efficient if you
provide this number and the confidential card.
Do not make any modifications to the
electronic immobiliser system.
Operating the remote control, even in your
pocket, may cause the doors to be unlocked
accidentally.
The simultaneous use of other high-frequency
devices (mobile phones, home alarms, etc.),
may temporarily disturb the operation of the
remote control.
Except for reinitialisation, the remote control
cannot operate while the key is in the ignition
switch, even when the ignition is off.
Driving with the doors locked could make
it more difficult for the emergency
services to enter the vehicle in an emergency.
As a safety precaution (with children on
board), remove the key from the ignition when
leaving the vehicle, even for a short time.
When purchasing a second-hand
vehicle:
– check that you are in possession of the
confidential card,
– have the keys memorised by a CITROËN
dealer, to be sure that the keys in your
possession are the only ones that allow the
vehicle to be started.
Confidential card

It is given to you upon delivery of your vehicle
with the duplicate key.
It contains the identification code required for
any intervention by a CITROËN dealer on the
electronic engine immobiliser system. This code
is hidden by a film, which is to be removed only
when necessary.
Keep your card in a safe place, never inside the
vehicle.
When undertaking a long trip or journey
however, it is advisable to take this card with you
along with your personal papers.
Starting-switching off the
engine
Ignition switch

STOP position: Anti-theft.
The ignition is off.
MAR position: ignition on.
Certain accessories can be used.
AV V position: starter.
The starter is operated.
Avoid attaching heavy objects to the key or the remote control, which would weigh
down on its blade in the ignition switch and
could cause a malfunction.

86
Driving
The message "Vehicle close" is displayed.Level 2 (red): visual and audible alert,
signalling that a collision is imminent.
The message "Brake! " is displayed.
Level 3: finally, in some cases, a haptic alert
in the form of micro-braking can be given,
confirming the risk of collision.
Where the speed of your vehicle is too
high approaching another vehicle, the
first level of alert may not be displayed: the
level 2 alert may be displayed directly.
Important: the level 1 alert is never displayed
for a stationary obstacle or 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 the driver
presses the brake pedal.
Active Safety Brake

This function, also called automatic emergency
braking, intervenes following the alerts 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
collision where the driver fails to react.
Operation
The system operates under the following
conditions:
– The vehicle's speed does not exceed 50 mph
(80 km/h) when a stationary vehicle is detected.
– The vehicle's speed is between 3 mph and
53 mph (5 km/h and 85 km/h) when a moving
vehicle is detected.
This warning lamp flashes (for about 10 seconds) once the function is acting
on the vehicle's brakes.
With a manual gearbox, in the event of automatic
emergency braking until the vehicle comes to a
complete stop, the engine may stall.
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 system malfunction, this
warning lamp comes on on the instrument
panel, accompanied by an onscreen message
and an audible signal.
Contact a CITROËN dealer or a qualified
workshop to have the system checked.
If these warning lamps come on
after the engine has been switched
off and then restarted, contact a CITROËN
dealer or a qualified workshop to have the
system checked.
Audible rear parking sensors
Refer to the General recommendations on the
use of driving and manoeuvring aids .


If fitted to your vehicle, the system consists of 4
proximity sensors installed in the rear bumper.
They detect any obstacle, e.g. person, vehicle,
tree, barrier, which is behind the vehicle while
manoeuvring.
Certain types of obstacle detected at the
beginning of the manoeuvre will no longer be
detected at the end of manoeuvre if they are
located in the blind spots between and under the
sensors. Examples: stake, roadworks cone or
pavement post.
The rear parking sensors may be associated
with the reversing camera.
Switching on
► Engage reverse gear with the gear lever.

99
Practical information
7A clogged passenger compartment filter can adversely affect air conditioning
system performance and generate
undesirable odours.
Oil filter
Change the oil filter each time the engine
oil is changed.
Particle filter (Diesel)
In addition to the catalytic converter, this filter
actively contributes to the preservation of
air quality by trapping the unburnt pollutant
particles. Black exhaust fumes are therefore not
emitted.
Operation
This filter, inserted into the exhaust system,
accumulates the carbonaceous particles. The
engine management computer automatically
and periodically manages the removal of
carbonaceous particles (regeneration).
The regeneration procedure is triggered
according to the amount of accumulated
particles and the conditions of use of the vehicle.
During this phase, you may notice certain
phenomena - accelerated idling, triggering of
the cooling fan, increased smoke and increased
temperature at the exhaust - which have no
impact on the operation of the vehicle and the
environment.
Following prolonged operation of the
vehicle at very low speed or at idle, you
may, in exceptional circumstances, notice the
emission of water vapour at the exhaust while
accelerating. This has no impact on the
vehicle’s behaviour and the environment.
Due to the high exhaust temperatures
caused by the normal operation of the
particle filter, it is recommended not to park
the vehicle on flammable materials (grass, dry
leaves, pine needles, etc.) to avoid any risk of
fire.
Saturation/Regeneration
If there is a risk of clogging, this warning
lamp comes on, accompanied by a
message on the instrument panel display.
This warning is due to the start of saturation of
the particle filter (exceptionally long urban driving
conditions: reduced speed, traffic jams, etc.).
In order to regenerate the filter, it is
recommended to drive as soon as possible -
when traffic conditions and regulations permit
- at a speed of at least 37 mph (60 km/h), with
an engine speed above 2,000 rpm for about
15 minutes (until the warning lamp and/or the
message disappear).
If possible, avoid switching off the engine
before the end of filter regeneration; repeated
interruptions can lead to early deterioration of the
engine oil. It is not recommended to terminate
the filter regeneration with the vehicle stationary.
Malfunction
If this alert persists, do not ignore this warning;
this indicates that a malfunction has occurred in
the exhaust system/particle filter assembly.
Have the assembly checked by a CITROËN
dealer or a qualified workshop.
Manual 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.
If this warning lamp comes on, have the
brake pads checked by a CITROËN
dealer or a qualified workshop.
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.

134
Technical data
In the engine compartment

A
Original paintwork
Colour
Code
Varnish
B
FOR TROUBLESHOOTING ONLY.
C
DANGER
AUTOMATIC ENGINE STARTING. REMOVE
THE IGNITION KEY WHEN THE BONNET IS
OPEN.
D


1 - WARNING
GENUINE LUBRICANTS AND FLUIDS
Engine oil Transmission
Radiator Brakes
Screenwash Power steering
CONSULT THE
MAINTENANCE
AND WARRANTY
GUIDE. PROTECT YOUR
EYES.
2 - SAFETY
The use of genuine replacement parts, fluids
and lubricants, as well as observing the servicing
schedules, guarantees the reliability and safety
of your vehicle over time, so maintaining it in its
original condition.
3 - DANGER
KEEP OUT
OF THE
REACH OF
CHILDREN. DO NOT
APPROACH
FLAMES. DO NOT
TOUCH.
DO NOT
REMOVE
THE CAP
WHEN THE
ENGINE IS
HOT. EXPLOSION.
CORROSIVE
LIQUID.
MAY START
AUTOMATICALLY EVEN
WITH THE ENGINE
SWITCHED OFF. DO NOT
OPEN GAS
UNDER HIGH
PRESSURE.
AUTOMATIC ENGINE
STARTING. REMOVE THE
IGNITION KEY WHEN THE
BONNET IS OPEN. HIGH
VOLTAGEIn the fuel filler flap

DANGER REMOVE SLOWLY.
FUEL VAPOURS MAY CAUSE INJURY.

176
Alphabetical index
A
ABS 52
Accessories 51
Active Safety Brake 84, 86
AdBlue® 101
AdBlue® tank 102
Adjusting the date 18
Adjusting the seat angle 27
Adjusting the seat belt height 55
Adjusting the time 18
Advice on driving 5, 64–65
Airbags 57–59
Airbags, curtain 58
Airbags, front 57–58
Airbags, lateral 58
Air conditioning 31, 35–36
Air conditioning, additional 35–36
Air conditioning, automatic 33
Air conditioning, manual 32–33
Air vents 31
Alarm 24–25
Anti-lock braking system (ABS) 52
Armrest, front 28
ASR 52
Assistance, emergency braking 52, 86
Audible warning 51
Audio streaming (Bluetooth) 162–163
Audio system 151
B
Battery 67, 120
Battery, 12 V 98, 120
Blind spot sensors 83
BlueHDi 12, 98
Bluetooth (hands-free) 154, 166–167
Bluetooth (telephone) 154, 166–167
Bonnet 94
Brake discs 99–100
Brakes 99–100
Braking, automatic emergency 84, 86
Brightness 6
Bulbs (changing) 111
Bulbs (changing, type) 111
C
Cable, audio 153, 162
Cable, Jack 153, 162
Capacity, fuel tank 90
CD 162
CD, MP3 162
Centre console 4
Changing a bulb 111
Checking the levels 96–98
Checks 98–100
Checks, routine 98–100
Children 56
Child seats 56, 58–59
Cigar lighter 43
Collision Risk Alert 84–85
Configuration, vehicle 13, 18
Container, AdBlue® 101–102
Control, heated seats 28
Control stalk, lighting 46
Control stalk, wipers 49
Courtesy lamp, front 38–40, 42
Courtesy lamp, rear 43
Courtesy lamps 43
Cruise control 78–80
D
DAB (Digital Audio Broadcasting) -
Digital radio 161
Dashboard 4
Daytime running lamps 46
Daytime running lamps, LED 46
Deactivating the passenger airbag 57, 59
Dimensions 129
Dipstick 96
Direction indicators 46
Display screen, instrument panel 6, 69
Driving 64–65
Driving abroad 46
Driving aids camera (warnings) 74
Driving aids (recommendations) 73
Driving economically 5
DSC 52
Dynamic stability control (DSC) 52–53