engine coolant CITROEN RELAY 2020 Handbook (in English)

6
Instruments
Instrument panel

1.Speedometer (mph or km/h)
2. Display screen
3. Fuel gauge
4. Coolant temperature
5. Rev counter (rpm x 1,000)
Level 1 display screen

In the lower part:
– Time,
– Outside temperature,
– Miles / Kilometres travelled,
– Trip computer (range, consumption, etc.),
– Headlamp beam height,
– Programmable overspeed alert,
– Speed limiter or cruise control,
– Gear shift indicator, –
Stop & Start.
In the upper part:
– Date,
– Service indicator,
– Alert messages,
– Function status messages,
– Vehicle configuration.
Level 2 display screen

In the left-hand part:
– Time,
– Outside temperature,
– Warning or status lamps,
– Speed limiter or cruise control.
In the right-hand part:
– Date,
– Service indicator,
– Trip computer (range, consumption, etc.),
– Alert messages,
– Function status messages,
– Vehicle configuration,
– Headlamp beam height,
– Miles / Kilometres travelled.
Brightness of the
instruments and controls
The brightness of the instruments and
controls can be adjusted using the MODE
button, with the sidelamps on.
For more information on Vehicle configuration
(MODE), refer to the corresponding section.
Warning and indicator
lamps
Displayed as symbols, the warning and indicator
lamps inform the driver of the occurrence of a
malfunction (warning lamps) or of the operating
status of a system (operation or deactivation
indicator lamps). Certain lamps light up in two
ways (fixed or flashing) and/or in several colours.
Associated warnings
The illumination of a lamp may be accompanied
by an audible signal and/or a message displayed
in a screen.
Relating the type of alert to the operating status
of the vehicle allows you to determine whether
the situation is normal or whether a fault has
occurred: refer to the description of each lamp
for further information.
When the ignition is switched on
Certain red or orange warning lamps come on
for a few seconds when the ignition is switched
on. These warning lamps should go off as soon
as the engine is started.

7
Instruments
1For more information on a system or a function,
refer to the corresponding section.
Warning lamp continuously
lit
The illumination of a red or orange warning lamp
indicates the occurrence of a fault that needs
further investigation.
If a warning lamp remains lit
The references (1), (2) and (3) in the warning
and indicator lamp description indicate whether
you should contact a qualified professional in
addition to the immediate recommended actions.
(1): You must stop the vehicle .
Stop as soon as it is safe to do so and switch off
the ignition.
(2): Contact a CITROËN dealer or a qualified
workshop.
(3): Visit a CITROËN dealer or a qualified
workshop.
List of warning and
indicator lamps
Red warning/indicator lamps
Coolant temperature
On H in the red zone or fixed with the
needle in the red zone.
The coolant temperature is too high and/or has
abnormally increased. Carry out (1), then wait until the engine has
cooled down before topping up the level, if
necessary. If the problem persists, carry out (2).
Engine oil pressureFlashing, for a few seconds, accompanied
by a message in the display.
The engine oil quality is deteriorated.
Change the engine oil as soon as possible.
After a second alert level, engine performance
will be limited.
Temporarily or permanently on, with the engine running.
A lack of oil or a major malfunction is detected.
Carry out (1) then manually check the level.
If necessary, top up.
If the level is correct, carry out (2).
Battery chargeFixed.
A malfunction in the charging circuit or the
battery is detected.
Check the battery terminals.
Fixed or flashing, despite the checks.
An ignition or injection malfunction is
detected.
Carry out (2).
Opening detectionFixed.
One of the vehicle access openings is not
properly closed.
Check that the cab doors, the rear and side
doors and the bonnet are closed.
Power steeringFixed, accompanied by an audible signal
and a message on the screen.
The power steering has a fault.
Drive carefully at moderate speed, then carry
out (3).
AirbagsFixed or flashing.
One of the airbags or seat belt
pyrotechnic pretensioners is faulty.
Carry out (3).
Seat belt not fastenedFixed, then flashing.
The driver has not fastened his seat belt.
Pull the strap then insert the tongue in the
buckle.
Accompanied by an audible signal, then fixed.
The vehicle is moving with the driver's seat belt
unfastened.
Check that the seat belt is fastened correctly by
pulling the strap.
Pneumatic suspensionFixed.
The system has a fault.
Carry out (3).
Parking brakeFixed.
The parking brake is applied or not
properly released.

11
Instruments
1regular intervals, the oil has to be changed as
soon as possible.
For 3.0 L HDi engines, the engine speed
is then limited to 3,000 rpm, then 1,500
rpm until the oil is changed. Change the
engine oil to prevent damage.
Resetting the service
indicator
A qualified workshop, equipped with the
diagnostic tool, will stop the permanent flashing
of the warning lamp after each service.
If you have serviced the vehicle yourself, reset
the service indicator as follows:
► Insert the key into the ignition switch.
► Turn it to the MAR - ON position.
► Simultaneously depress the brake and
accelerator pedals for more than 15 seconds.
Refer to the checklist in the
manufacturer's service schedule
provided on delivery of the vehicle.
Reminder of the servicing
information
To access the service indications at any
time, briefly press the MODE button.
Use the up/down arrows to view service intervals
and engine oil quality.
Pressing the MODE button again allows you to
return to the various display menus.
A long press allows you to return to the home
screen.
Menu... Select... Allows you
to...
Service Service
(miles/
km before
service) Display the
remaining
miles/
kilometres to
be travelled
before the
next service.
Oil change
(miles/km
before oil
change) Display the
remaining
miles/
kilometres to
be travelled
before the
next oil
change.
For more information on Vehicle
configuration (MODE) , refer to the
corresponding section.
Coolant temperature

If the needle is positioned between C (Cold)
and H (Hot): normal operation.
In arduous conditions of use or hot climatic
conditions, the needle may move close to the red
graduations.
If the needle enters the red zone or if the
warning lamp lights up:
► stop immediately, turn the ignition off. The
cooling fan may continue to run for a while, up to
approximately 10 minutes.
► wait for the engine to cool down to check the
level and if necessary, top it up.
In case of topping up
Be careful, the cooling circuit is under pressure!
To avoid any risk of burns, take a cloth and
unscrew the cap two turns to relieve the
pressure.
When the pressure has dropped, check the level
and remove the cap to top up.
If the needle remains in the red zone,
contact a CITROËN dealer or a qualified
workshop.

12
Instruments
Check the engine coolant level regularly.
For more information on Checking
levels, refer to the corresponding section.
AdBlue® fluid ange
indicators
Once the AdBlue® tank is on reserve or after
detection of a fault with the SCR emissions
control system, when the ignition is switched on,
an indicator displays an estimate of the distance
that can be travelled before engine starting is
prevented.
In the event of a simultaneous system fault and
low AdBlue
® level, the shortest-range figure is
the one displayed.
In the event of the risk of non-starting
related to a lack ofAdBlue®
The engine start prevention system
required by regulations is activated
automatically once theAdBlue
® tank is empty.
Range greater than 1,500 miles (2,400 km)
When switching on the ignition, there is no
automatic display of range in the instrument
panel.
Range between 1,500 and 375 miles (2,400
and 600 km)
Once the 1,500 miles (2,400 km)
threshold is reached, this indicator
flashes, accompanied by a temporary message
indicating the driving autonomy expressed in
miles or kilometres before the starting of the
engine is blocked.
Each time the ignition is switched on, the alert
will be accompanied by an audible signal.
The reserve level has been reached; it is
recommended that you top up as soon as
possible.
Range less than 372 miles (600 km)
Once the 372 miles (600 km) threshold is
reached, this indicator flashes,
accompanied by a message indicating the
driving autonomy expressed in miles or
kilometres before the starting of the engine is
blocked.
The alert will be repeated with update of the
remaining range at each increment of 31 miles
(50 km) travelled.
Each time the ignition is switched on, the alert
will be accompanied by an audible signal.
It is imperative to top up as soon as possible
before the tank empties completely. Otherwise
you will not be able to restart the vehicle.
Breakdown related to a lack of AdBlue
®
0 km range reached: the AdBlue® tank is empty.
The regulatory device prevents the engine from
starting.
Unless the AdBlue
® is topped up in the
special additive tank, the vehicle will remain
immobilised.
To be able to restart the engine, you must top up with at least 4 litres of
AdBlue®. You can also call a CITROËN dealer
or a qualified workshop for the top-up
required.
For more information on AdBlue®
(BlueHDi engines) and, in particular
topping up, refer to the corresponding section.
In the event of a fault with the SCR
emissions control system
Detection
The self-diagnostic warning lamp comes
on.
Every time the ignition is switched on, the
emissions fault is confirmed by an audible signal
and a message.
If it is a temporary fault, the alert disappears
as soon as the exhaust emissions return to the
levels required by the standard.
However, if the warning lamp is still on
after 30 miles (50 km) of driving, the fault
is confirmed.
An engine start prevention system will be
activated automatically after 250 miles (400
km) travelled following this confirmation.
See a CITROËN dealer or a qualified
workshop as soon as possible.

65
Driving
6Effective eco-driving saves fuel; accelerate
progressively, anticipate the need to slow down
and adapt your speed to suit the situation.
Indicate changes of direction well in advance so
that you are seen by other road users.
Take care
The tyres must be inflated to at least the
pressures indicated on the label, even over-
inflated by 0.2 to 0.3 bar for long journeys.
On flooded roads
We strongly advise against driving on flooded
roads, as this could cause serious damage to
the engine or gearbox, as well as to the electrical
systems of your vehicle.


If you are obliged to drive on a flooded road:
► check that the depth of water does not
exceed 15 cm, taking account of waves that
might be generated by other users,
► deactivate the Stop & Start function,
► drive as slowly as possible without stalling. In
all cases, do not exceed 6 mph (10 km/h),
► do not stop and do not switch off the engine.
On leaving the flooded road, as soon as safety
conditions allow, make several light brake
applications to dry the brake discs and pads.
If in doubt about the state of your vehicle,
contact a CITROËN dealer or a qualified
workshop.
In case of towing
Driving with a trailer places greater
demands on the towing vehicle and
requires extra care from the driver.
Respect the maximum towable weights.
At altitude: reduce the maximum load by
10% per 1,000 metres of altitude; the density
of the air decreases with altitude and the
performance of the engine reduces.
New vehicle: do not pull a trailer before
having driven at least 620 miles (1,000
kilometres).
If the outside temperature is high, let the
engine idle for 1 to 2 minutes after the
vehicle comes to a stop, to help it to cool.
Before setting off
Nose weight
► Distribute the load in the trailer so that the
heaviest items are as close as possible to the
axle and the nose weight (at the point where it
joins your vehicle) approaches the maximum
permitted without exceeding it.
Tyres
► Check the tyre pressures of the towing
vehicle and of the trailer, observing the
recommended pressures.
Lighting
► Check the electrical signalling on the trailer
and the headlamp beam height of your vehicle.
If a genuine CITROËN towing device is
used, the rear parking sensors will be
deactivated automatically to avoid the audible
signal.
When driving
Cooling
Towing a trailer uphill increases the temperature
of the coolant. The maximum towable load
depends on the gradient and the exterior
temperature. The cooling capacity of the fan
does not increase with engine speed.
► Reduce speed and lower the engine speed,
so as to limit the heating-up.
In all cases, pay attention to the coolant
temperature.
If this warning lamp and the STOP
warning lamp come on, stop the vehicle
and switch off the engine as soon as possible.

95
Practical information
7

► Pull the control located on the side of the
dashboard towards you.
On the outside

► Push the lever located above the grille
upwards and lift the bonnet.
Do not open the bonnet under very windy
conditions.
When the engine is hot, handle the lever and
the stay with care (risk of burns).


► Unclip the stay and rotate it to insert it into
the first slot and then into the second slot.
Because of the presence of electrical
equipment under the bonnet, it is
recommended that exposure to water (rain,
washing, etc.) be limited.
Closing the bonnet
► Before closing the bonnet, replace the stay in
its housing. ►
Lower the bonnet and release it near the end
of its travel. Check the bonnet is locked.
Diesel engines



1. Screenwash and headlamp washer reservoir
2. Power steering fluid reservoir
3. Engine coolant reservoir
4. Brake and clutch fluid reservoir
5. Diesel fuel filter
6. Fusebox
7. Air filter
8. Dipstick
9. Engine oil filler cap
Battery connections:
+ Positive metallic terminal
- Negative metallic terminal (earth)

97
Practical information
7Topping up the engine oil level

► Remove the dipstick before topping up.
► Recover the oil filler neck.
► Unscrew the filler cap.
► Install the oil filler neck in the filler hole.
► Top up with oil.
► Remove the oil filler neck from the filler hole.
► Replace the filler cap.
► Replace the dipstick.
Brake fluid
The level of this fluid should be close to
the "MAX" mark. If not, check the brake
pad wear.
To know how often the brake fluid should be
replaced, refer to the manufacturer's servicing
schedule.
If topping up, clean the cap before
replacing it. Use only DOT4 brake fluid
from a sealed canister.
Power steering fluid
The level of this fluid should be close to the "MAX" mark. Check it, with the
vehicle parked on level ground and with the
engine cold, by reading the level on the filler
neck.
Unscrew the cap secured to the dipstick. To
access the reservoir cap, remove the protective
cover by turning its three fixing screws a quarter
turn, then remove the second cover placed on
the cap.
Engine coolant
It is normal to top up this fluid between
two services.
The check and top-up must only be done with
the engine cold.
A low level presents a risk of serious damage to
the engine.
The level of this fluid should be close to the
"MAX" mark but should never exceed it.
If the level is close to or below the " MIN” mark, it
is essential to top up.
When the engine is hot, the temperature of this
fluid is regulated by the fan.
As the cooling system is pressurised, wait at
least one hour after switching off the engine
before carrying out any work.


To gain access to the tank cap, remove the
protective cover by turning its three fixing screws
a quarter of a turn.
In order to avoid the risk of scalding if 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.
Check the coolant level regularly
according to the use of your vehicle
(every 3,000 miles (5,000 km) / 3 months).

177
Alphabetical index
E
EBA 52
EBFD 52
Eco-driving (advice) 5
Electric windows 25
Electronic brake force distribution (EBFD) 52
Emergency warning lamps 51
Emissions control system, SCR 101
Engine compartment 95
Engine, Diesel 91, 95, 124
Engines 124
Environment 5
ESP/ASR 53
F
Filling the AdBlue® tank 98, 101–102
Filling the fuel tank 90
Filter, air 98
Filter, Diesel fuel 96, 100
Filter, oil 99
Filter, particle 99
Filter, passenger compartment 31, 98
Fittings, front 38–42
Fittings, interior 38–42
Flap, fuel filler 90
Flashing indicators 46
Fluid, brake 97–98
Fluid, engine coolant 97–98
Fluid, power steering 97–98
Foglamps, front 46
Foglamps, rear 46
Front doors 23
Fuel 5, 91
Fuel consumption 5
Fuel tank 90
G
Gauge, fuel 90
Gearbox, manual 69–70, 99
Glove box 38–41
H
Hazard warning lamps 51
Headlamp flash 46
Headlamps, dipped beam 46
Headlamps, main beam 46
Head restraints, front 27
Heating 31–33
Heating, additional 35–36
Hill Descent Control 54–55
Hill start assist 70
Horn 51
I
Immobiliser, electronic 66
Indicator, coolant temperature 11
Indicator, engine oil level 10–11
Indicators, direction 46
Inflating tyres 100
Information, vehicle 168
Infrared camera 74
Instrument panel 74
Instruments and controls 4
Intelligent Traction Control 53–54
J
Jack 153, 162
K
Kit, hands-free 154, 166–167
L
Lane Departure Warning System (LDWS) 81
Level, AdBlue® 98
Level, brake fluid 97
Level, engine coolant 11, 97
Level, engine oil 96
Level, power steering fluid 97
Levels 97–98
Levels and checks 96–97
Lighting dimmer 6

178
Alphabetical index
Low fuel level 90
Lumbar 27
M
Maintenance, routine 74, 98
Manoeuvring aids (recommendations) 73
Mat 74
Menu 13, 160–161, 163, 166, 168
Menus (audio) 160–161
Mirrors, door 31, 83
O
Oil change 96
Oil consumption 96
OIl, engine 96–98
On-board tools 105–110
Opening the bonnet 94
Overhead storage 38–41
P
Pads, brake 99
Parking brake 68, 100
Player, USB 152–153, 161–162
Port, USB 152–153, 161–162
Pressures, tyres 100
Pre-tensioning seat belts 56
Protecting children 57–59
R
Radar (warnings) 74
Radio 152, 160, 162
Radio, digital (Digital Audio
Broadcasting - DAB) 161
Range, AdBlue® 12, 98
Recovery 122
Regeneration of the particle filter 99
Remote control 20, 66
Replacing bulbs 111
Replacing the air filter 98
Replacing the oil filter 99
Replacing the passenger compartment
filter 98
Resetting the service indicator 10–11
Reversing camera 74
S
Safety, children 57–59
Screen, colour 160
Screen menu map 160–161, 163, 166, 168
Screenwash fluid 97–98
SCR (Selective Catalytic Reduction) 101
Seat belts 55–56
Seat belts, rear 56
Seats, heated 28
Seats, rear 59
Sensors (warnings) 74
Service indicator 10–11
Servicing 10–11, 98
Settings, equipment 13, 18
Sidelamps 46
Snow chains 91
Socket, auxiliary 153, 162
Socket, Jack 153, 162
Sockets, auxiliary 38–41
Speed limiter 76–77
Speed limit recognition 75–76
Speedometer 74
Stability control (ESC) 52
Stability control (ESP) 53
Starting a Diesel engine 91
Station, radio 152, 160
Steering mounted controls, audio 151, 159
Steering wheel adjustment 30
Stop & Start 32, 38, 49, 56, 69–70, 94, 98, 122
Storage 38–41
Sunshine sensor 31
T
Tables of engines 124
Table, writing 38–40
Tank, fuel 90
Technical data 124
Telephone 154, 166–168
Temperature, coolant 11