oil level CITROEN RELAY 2020 Handbook (in English)

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.

10
Instruments
Be extra vigilant and avoid sudden braking.
Date / TimeFixed.
It is set via the “MODE” menu.
Beam heightFixed.
The headlamps are adjusted from position
0 to 3 depending on the load transported.
Adjust with the buttons on the MODE control
module.
Service spannerFixed.
Service is due.
Refer to the list of checks in the manufacturer's
service schedule then have the service carried
out.
Stop & StartFixed.
With the vehicle stationary (traffic lights,
stop sign, congestion, etc.), the Stop & Start
system puts the engine in STOP mode.
The indicator lamp goes off and the engine
restarts automatically in START mode, as soon
as you move off.
Flashing for a few seconds, then goes off.
STOP mode is temporarily unavailable.
Gear shift indicatorFixed.
The next higher gear may be engaged.
Speed limiterFixed.
The limiter is activated.
Fixed with "OFF".
The limiter is selected and not active.
Indicators
Service information
For a few seconds after the ignition is switched
on, the spanner symbolising service information
comes on: the screen informs you when the next
service is due, in accordance with the servicing
schedule indicated in the manufacturer's service
schedule.


This information is determined in relation to the
distance travelled since the previous service.
Engine oil level
Depending on the engine, the engine oil level is
then displayed, on a scale of 1 (Min) to 5 (Max).
If no scale is displayed, the oil level is
insufficient; it is essential to top it up to prevent
engine damage.
For the measurement of this level to be valid, the
vehicle must be parked on horizontal ground,
with the engine having been off for more than 30
minutes.
If in doubt, check the oil level using the
dipstick.
For more information on Checking levels,
refer to the corresponding section.


After a few seconds, the display returns to its
standard functions.
Engine oil quality
This warning lamp flashes and, if your vehicle is equipped with this function, a
message is displayed at each start: the system
has detected a deterioration of the engine oil. It
is essential to change the oil as soon as
possible.
This 2nd warning lamp, coupled with the
1st, lights up on the instrument panel if the
oil change has not been carried out, and the
degradation of the oil has exceeded a new
threshold. If this warning lamp comes on at

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.

90
Practical information
For other versions, the second button is
replaced by a fuse; contact a CITROËN
dealer or a qualified workshop.
Compatibility of fuels
Diesel fuels conforming to the EN590, EN16734
and EN16709 standards and containing up to
7%, 10%, 20% and 30% fatty acid methyl ester
respectively. The use of B20 or B30 fuels, even
occasionally, imposes special maintenance
conditions referred to as "Arduous conditions".

Paraffinic Diesel fuel conforming to the EN15940
standard.
The use of any other type of (bio) fuel (vegetable or animal oils, pure or diluted,
domestic fuel, etc.) is strictly prohibited (risk
of damage to the engine and fuel system).
The only Diesel fuel additives authorised for use are those that meet the B715000
standard.
Diesel at low temperature
At temperatures below 0 °C (+32 °F), the
formation of paraffins in summer-type Diesel
Fuel
The capacity of the tank is about 90 litres.
Fuel tanks of different capacities may be fitted,
60 and 120 litres, depending on the engine.
Low fuel level
When the low fuel tank level E (Empty) is
reached, this warning lamp comes on.
At this moment, you have approximately 10 or
12 litres left in the reserve, depending on the
capacity of your tank and the engine.
You must refuel as soon as possible to avoid
running out of fuel.
Refuelling
The fuel tank must be filled with the engine off.
► Open the fuel filler flap.
► Hold the black filler cap with one hand.
► With the other hand, insert the key and turn it
anti-clockwise.


► Remove the black filler cap and hang it on
the hook located on the inside of the filler flap.
A label inside the fuel filler flap indicates the type
of fuel to use.
Do not continue past the 3
rd cut-off of the nozzle.
This may cause malfunctions.
► After filling the fuel tank, lock the black filler
cap and close the filler flap.
With the Stop & Start system, never
refuel with the engine in STOP mode;
you must switch off the ignition using the key.
Fuel system cut off
In the event of an impact, a device automatically
cuts off the fuel supply to the engine and the
vehicle's power supply.
It triggers the hazard warning lamps and the
courtesy lamps, as well as the unlocking of the
doors.
After the impact and before restoring these power supplies, check that there
are no fuel leaks or sparks to avoid any risk of
fire.


► To restore the fuel supply, press the first
button, located on the front right-hand side.


► To then restore the power supply, press
the second button, located in the battery
compartment under the floor (Minibus).

91
Practical information
7For other versions, the second button is
replaced by a fuse; contact a CITROËN
dealer or a qualified workshop.
Compatibility of fuels
Diesel fuels conforming to the EN590, EN16734
and EN16709 standards and containing up to
7%, 10%, 20% and 30% fatty acid methyl ester
respectively. The use of B20 or B30 fuels, even
occasionally, imposes special maintenance
conditions referred to as "Arduous conditions".

Paraffinic Diesel fuel conforming to the EN15940
standard.
The use of any other type of (bio) fuel (vegetable or animal oils, pure or diluted,
domestic fuel, etc.) is strictly prohibited (risk
of damage to the engine and fuel system).
The only Diesel fuel additives authorised for use are those that meet the B715000
standard.
Diesel at low temperature
At temperatures below 0 °C (+32 °F), the
formation of paraffins in summer-type Diesel
fuels could prevent the engine from operating
correctly. In these temperature conditions, use
winter-type Diesel fuel and keep the fuel tank
more than 50 % full.
At temperatures below -15 °C (+5 °F) to avoid
problems starting, it is best to park the vehicle
under shelter (heated garage).
Travelling abroad
Certain fuels could damage your vehicle’s
engine.
In certain countries, the use of a particular
fuel may be required (specific octane rating,
specific trade name, etc.) to ensure correct
operation of the engine.
For all additional information, consult a dealer.
Snow chains
In wintry conditions, snow chains improve
traction as well as the behaviour of the
vehicle when braking.
The snow chains must be fitted only to the front wheels. They must never be
fitted to "space-saver" type spare wheels.
Observe the legislation in force in your
country on the use of snow chains and
the maximum authorised speed.
Use only the chains designed to be fitted to the
type of wheel fitted to your vehicle:
Original tyre size Maximum link size.
205/70 R15 16 mm
215/70 R15 12 mm
225/70 R15 16 mm
215/75 R16 12 mm
225/75 R16 16 mm
For more information on snow chains, contact a
CITROËN dealer or a qualified workshop.
Installation tips
► To fit the chains during a journey, stop the
vehicle on a flat surface on the side of the road.
► Apply the parking brake and position any
wheel chocks under the wheels to prevent
movement of the vehicle.
► Fit the chains following the instructions
provided by the manufacturer.
► Move off gently and drive for a few moments,
without exceeding 31 mph (50 km/h).
► Stop the 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 surface.
Avoid driving with snow chains on roads that have been cleared of snow to avoid
damaging the vehicle's tyres and the road
surface. If the vehicle is fitted with alloy

96
Practical information
Topping 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.
The Diesel circuit is 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 the following levels regularly in
accordance with the manufacturer's service
schedule. Top them up if required, unless
otherwise indicated.
If a level drops significantly, have the
corresponding system checked by a CITROËN
dealer or a qualified workshop.
The fluids must comply with the manufacturer's requirements 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).
If the engine cover is to be removed /
refitted, handle it with care to avoid
damaging the mounting clips.
Used products
Avoid prolonged contact of used oil or fluids with the skin.
Most of these fluids are harmful to health and
very corrosive.
Do not discard used oil or fluids into
sewers or onto the ground.
Empty used oil into the containers reserved
for this purpose at a CITROËN dealer or a
qualified workshop.
Engine oil
The level is checked, with the engine having been switched off for at least 30
minutes and on level ground, using the dipstick.
It is normal to top up the oil level between two
services (or oil changes). It is recommended
that you check the level, and top up if necessary,
every 3,000 miles (5,000 km).
In order to maintain the reliability of the
engine and emissions control system,
never use additives in the engine oil.
Checking using the dipstick
For the location of the dipstick, please refer
to the illustration of the corresponding engine
compartment.
► Grasp the dipstick by its coloured grip and
pull it out completely.
► Wipe the end of the dipstick using a clean,
lint-free cloth.


► Reinsert the dipstick and push fully down,
then pull it out again to visually check the oil
level: the correct level is between marks A (max)
and B (min).
Do not start the engine if the level is:
– above mark A: contact a CITROËN dealer or a
qualified workshop.
– below mark B: top up the engine oil
immediately.
Oil grade
Before topping up or changing the engine
oil, check that the oil is suitable for the engine
and complies with the recommendations in
the service schedule supplied with the vehicle
(or available from your CITROËN dealer and
qualified workshops).
Use of non-recommended oil may invalidate
the contractual warranty in the event of
engine failure.

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).

98
Practical information
A 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.
Screenwash and headlamp
washer fluid
To check the level or top up this fluid on
vehicles fitted with headlamp washers,
immobilise the vehicle and switch off the engine.
Reservoir capacity: approximately 5.5 litres.


To access the filler cap, pull the telescopic filler
neck and unclip the cap.
Fluid specification
The fluid must be topped up with a ready-to-use
mixture.
In winter (temperatures below zero), a liquid
containing an agent to prevent freezing must
be used which is appropriate for the prevailing
conditions, in order to protect the elements of the
system (pump, tank, ducts, jets, etc.).
Filling with pure water is prohibited under
all circumstances (risk of freezing,
limestone deposits, etc.).
AdBlue (BlueHDi)
An alert is triggered when the reserve level is
reached.
For more information on Indicators and in
particular the AdBlue range indicators, refer to
the corresponding section.
To avoid the vehicle being immobilised in
accordance with regulations, you must top up the
AdBlue tank.
For more information on AdBlue
® (BlueHDi),
and in particular on the supply of AdBlue, refer to
the corresponding section.
Checks
Unless otherwise indicated, check these
components in accordance with the
manufacturer's service schedule and according
to your engine.
Otherwise, have them checked by a CITROËN
dealer or a qualified workshop.
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.
12 V battery
The battery does not require any maintenance.
However, check regularly that the terminals
are correctly tightened (versions without quick
release terminals) and that the connections are
clean.
For more information on the precautions
to take before any work on the 12 V
battery, refer to the corresponding section.
Versions equipped with Stop & Start are
fitted with a 12 V lead-acid battery of
specific technology and specification.
Its replacement should be carried out only by
a CITROËN dealer or a qualified workshop.
Air filter
Depending on the environment and the
use of the vehicle (e.g. dusty atmosphere,
city driving), change it twice as often, if
necessary .
Passenger compartment
filter
Depending on the environment and the
use of the vehicle (e.g. dusty atmosphere,
city driving), change it twice as often, if
necessary .

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.

148
Special features

– Never work under a tipper body that is not
supported,
– Switch off the power supply to the electro-
hydraulic unit using the circuit breaker,
– Vehicle stationary, engine off.
For safety reasons, we very strongly
advise against doing anything under the
tipper body while it is being operated or while
it is being serviced.
Maintenance
Reservoir
Regularly check and top up the engine oil level.
Change the oil once a year. If the oil contains
water, change it.
Regularly check the condition of the hose and
ensure the hydraulic system is properly sealed.
Pump and motor
No servicing required. The rolling elements are
permanently lubricated and the bearings are
lubricated by the pumped oil.
Lubrication
The pins of the tipper truck and the ram do not
contain lubricant. Regularly lubricate the hinges
and the grab handles of the side boards as well
as the retaining hooks of the rear board.
Sub-frame and tipper truck
For maximum service life, you are advised to
maintain your tipper truck by regularly washing it
using a power washer.
Carry out any required paint touch-ups quickly to
prevent the spread of rust.
After 8 months of use, check the tightening torque of the connection
between the chassis and the underbody (in
accordance with the manufacturer's
bodybuilding recommendations).
Cleaning the slide valve
► Loosen cap 244A, taking care with the ball
and retrieving it.
► Using a wide screwdriver, unscrew the banjo
bolt/piston assembly.
► Check that the piston slides freely and
remove any foreign bodies. Use a magnet to
remove any metal filings.
► Refit the assembly and make sure that the
piston slides freely. Retain the ball with a little
grease on the cap for refitting.
► Bleed the hydraulic unit.
Bleeding the hydraulic unit
► Unscrew hexagonal cap 257.
► Loosen internal screw 587 by half a turn,
using a 6 mm hex key.
► Operate the unit for a few seconds by
pressing the raise button.
The tipper truck does not rise or rises very
slowly. When the oil exits through this opening,
the unit is bled.
► Retighten screw 587 and replace cap 257.
Check that the tipper truck lowers correctly.
Detailed diagram of the UD2386 hydraulic
unit


Diagnostics
Symptoms ElectricHydraulic Verification/Check
The hydraulic unit does not work. XPower harness and unit relay.
X Control harness (control unit).
X Circuit-breaker.
Very noisy unit, rises slowly. XSuction strainer clogged or crushed at the bottom of the tank.
Very noisy new unit, rises quickly. XPump alignment, change the unit.
The ram lowers by itself. XLowering valve crushed or blocked.
The ram does not lower. XYes, check the slide valve and bleed.
Refer to the "Maintenance" section.
X No, check the coil and the electrical connections of the valve.
X No, replace the solenoid valve.
X No, check the alignment of the ram.
The unit works but its pressure does
not increase. X
Slide valve jammed if no solenoid valve on the unit.
Refer to the "Maintenance" section.
X Pressure relief device, setting, dirt.
X Pump seal out of service.
X Motor/pump coupling.
X Pump loose from its support.
The hydraulic unit does not work. XSolenoid valve blocked, replace it or retighten the nut behind the strainer .
The control unit does not work. XCheck connection and contacts.
Emulsion in the tank. XIncorrectly positioned return pipe.
X Insufficient oil level.