2015 CITROEN RELAY engine coolant

10
Location
Screenwash/headlamp wash, level 125
Bulbs, lighting, changing
bulbs 138-143
Opening the bonnet, stay 122
Under the bonnet 123
Engines 159
Identifi cation markings, serial
number, paint, tyres 163 Changing a wiper blade
144
Levels 124-125
● dipstick,
● power steering fl uid,
● brake fl uid,
● coolant.
Water bleed, Diesel fi lter 126
Particle fi lter 128
Emission control 33
Checks 126-128
● battery,
● air/passenger compartment fi lter,
● oil fi lter,
● manual gearbox,
● parking brake,
● brake discs and pads.
Engine fuses 134, 137
TECHNICAL DATA - MAINTENANCE
Dimensions 152-158
Weights 160-162

25
2
READY TO GO
Instruments and controls
Warning lamp is indicates Solution - action
Coolant
temperature on with the
needle in the red
zone.
an abnormal increase.
Park and switch off the ignition. Allow the system to cool
sufficiently. Visually check the level.
on H in the red
zone. the coolant temperature is too
high. "Checks - Levels and checks" section.
Contact a CITROËN dealer or a qualified workshop.
Engine oil
pressure on while driving.
that the pressure is too low. Park and switch off the ignition. Allow the lubrication
system to cool in order to check its level.
"Checks - Levels and checks" section.
continuously on,
even though the
level is correct. a major fault.
Contact a CITROËN dealer or a qualified workshop.
flashing, for a
few seconds,
with a message
on the screen. a high level of deterioration of
the engine oil. Have the engine oil changes as soon as possible. After
the second level of alert, engine performance will be
limited. Your vehicle's programmed service schedule is
not altered.
Battery charge on.
a fault with the charging
system. Check the battery terminals….
"Quick help - Flat battery" section.
continuously on,
fixed or flashing
in spite of the
checks. an ignition or injection fault.
Have it checked by a CITROËN dealer or a qualified
workshop.
Door or bonnet
open detection on. that a door or the bonnet is not
closed correctly. Check that the cab doors, the rear and side doors and
the bonnet are closed.

32
Instruments and controls
FUEL GAUGE

The fuel level is tested every time the
ignition is turned on.
The gauge is positioned on:
- F (Full): the fuel tank is full, approximately 90 litres.
- E (Empty): the reserve is now being used, the low fuel warning lamp comes
on continuously.
The reserve when the warning first comes
on is approximately:
- 10 litres for 60 and 90 litre tanks,
- 12 litres for 125 litre tanks.
Fuel tanks of different capacities (60 and
125 litres) are available as an option.
COOLANT TEMPERATURE
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 comes on:

- stop immediately, switch off the ignition. The fan may continue to operate for a
certain time up to approximately
10 minutes.
- wait for the engine to cool down in order to check the level and top it up if
necessary. Follow this advice:
the cooling system is pressurised. In order
to avoid any risk of scalding, unscrew the
cap by two turns to allow the pressure
to drop.
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.
Refer to the "Checks - Fuel" section. Refer to the "Checks - Levels and
checks" section.

64
Ventilation
ADDITIONAL HEATING SYSTEMS
Supplementary heating
On the 2-3 seats version, this is located
under the seat on the driver's side with air
diffusion directed forwards.
REAR HEATING AND/OR AIR CONDITIONING
If your vehicle is fitted with an
additional air conditioning unit,
located in the rear of the vehicle:
the distribution duct located in
the roof and the individual diffusion vents
provide a perfect diffusion of cold air.
The warm air diffused at the floor, from the
front air conditioning unit, is distributed at
the feet of the rear passengers of rows 2
and 3.
A warm air diffusion vent, located on the rear
left wheelarch, may complete the assembly
for the feet of the rear passengers of row 3.
Additional heating
This is passenger compartment heating,
additional to the standard equipment.
It can operate independently of the engine.
Additional heater or programmable additional heating
This is an additional, programmable and
separate system which heats the Diesel
engine hot coolant loop to make starting
easier.
It improves the demisting and defrosting
performance and that of the heated seats, if
fitted to the vehicle.
The passenger compartment heating is
brought up to temperature more rapidly.
This system must be programmed to start up
before you enter the vehicle. On the 5-9 seats version, it is
located at the rear. Depending
on the model version, the air
diffusion is either direct from the
rear or comes from the rail located under
each of the two rows of seats.
Press this control to activate/
deactivate the heating. The LED
is on if the heating is activated.
When rapid demisting and
defrosting is required, switch off the control.

68
Ventilation
Cancelling the programming
Press this button briefly to clear
the programmed start time.
The screen illumination and the
pre-selection number (e.g. 1) are
switched off.
Good practice
To avoid any risk of poisoning or
asphyxiation, the additional heating must
not be used, even for short periods, in
an enclosed space such as a garage or
workshop which is not fitted with an exhaust
gas extraction system.
The additional heating is supplied by the
vehicle's fuel tank.
Ensure that the fuel gauge indicator lamp is
not at reserve.
Always switch off the additional heating
when filling with fuel to avoid any risk of fire
or explosion.
Do not park the vehicle on an inflammable
surface (dry grass, dead leaves, paper…),
there is a risk of fire.
The temperature near the heater must not
exceed 120 °C. A temperature higher than
this (for example in the case of painting in
an oven) could damage the components of
the electronic circuits.
The additional heating system is fitted with
a temperature limiter which cuts off the
combustion in the event of overheating due
to a lack of coolant.
Top up the coolant, then press the
programme selection control before
switching the heating on again. Have the additional heating system
checked at least once a year at the
beginning of winter. Maintenance and
repairs should only be carried out by a
CITROËN dealer.
Use only genuine replacement parts.
Recalling one of the pre-selected start times
Press this button as many times
as necessary until the number
corresponding to the required
pre-selected start time (e.g. 2)
appears.
After ten seconds, the time is cleared but
remains stored for as long as the number
(e.g. 2) and the screen remain on.
Switching off the heating
Press this button.
The heating cycle indicator lamp
and the screen are switched off.
Two different types of equipment
The additional heating is separate and
programmable. Before you enter the vehicle,
it gradually increases the temperature of the
engine to make starting easier.
This also facilitates passenger compartment
heating, demisting and defrosting.
The additional passenger compartment
heating system supplements the
standard equipment. Its operation may be
independent of the engine.
Switching on of the heating may be
programmable.

11 7
6
Transport solutions
ACCESSORIES
Distribution of loads: distribute the load in
the trailer so that the heaviest objects are as
close as possible to the axle and the nose
weight is close to the maximum authorised
without, however, exceeding it.
Driving advice
A towed vehicle must free wheel: gearbox in
neutral.
Cooling: towing a trailer on a slope
increases the coolant temperature.
As the fan is electrically controlled, its
cooling capacity is not dependent on the
engine speed.
On the contrary, use a high gear to lower the
engine speed and reduce your speed.
In all cases, pay attention to the coolant
temperature. Tyres: check the tyre pressures of the
towing vehicle and of the trailer, observing
the recommended pressures.
Fitting a towbar
We recommend the use of genuine
CITROËN towbars and their harnesses,
which have been tested and approved from
the design stage of your vehicle and that
the fitting of this equipment is entrusted to a
CITROËN dealer.
These genuine towbars are compatible with
the operation of the rear parking sensors
and the reversing camera, if fitted to your
vehicle.
If this equipment is not fitted by a CITROËN
dealer, it must be fitted in line with the
manufacturer's instructions.
Good practice
In certain cases of particularly arduous
use (towing the maximum load up a steep
slope in high temperatures), the engine
automatically limits its power. In this
case, the automatic cutting off of the air
conditioning allows the engine power to be
recovered.
If the coolant temperature
warning lamp comes on, stop the
vehicle and switch off the engine
as soon as possible.
Refer to the "Checks - Levels and
checks" section.
Brakes: towing increases the braking
distance. Drive at a moderate speed,
change down early and brake gradually. Side wind: sensitivity to side wind is
increased. Drive smoothly and at a
moderate speed.
ABS: the system only controls the vehicle,
not the trailer.
Rear parking sensors: the system does not
operate while the vehicle is towing.
Refer to the "Technical data -
Identification markings" section.

123
7
Under the bonnet
CHECKS
1. Windscreen/headlamp wash fluid reservoir.
2. Fusebox.
3. Coolant reservoir.
4. Brake and clutch fluid reservoir.
5. Air filter. 6. Dipstick.
2.2 Iitre HDi engine
7. Engine oil filler cap.
2.2 Iitre HDi engine
8. Power steering fluid reservoir.
Battery connections :
+ Positive terminal.
- Negative terminal (earth).
UNDER THE BONNET - DIESEL ENGINES

125
7
CHECKS
Levels and checks
Cooling system
Only use the fluid recommended by the
manufacturer. Otherwise, you risk seriously
damaging your engine. When the engine
is warm, the temperature of the coolant is
controlled by the engine fan. As this fan can
operate with the ignition key removed and
because the cooling system is pressurised,
wait for at least one hour after the engine
has stopped before carrying out any work.
Slacken the cap by 1/4 of a turn to release
the pressure to prevent any risk of scalding.
When the pressure has dropped, remove the
cap and top up the level with coolant.
Power steering fluid level
The vehicle must be parked on level ground
with the engine cold. Unscrew the cap
integrated with the gauge and check the
level which must be between the MIN and
MAX marks.
For access to the reservoir filler cap, remove
the protective cover by removing its three
fixing screws, then remove the second cover
fitted to the cap. Topping up
The level must be between the MIN and
MAX marks on the expansion bottle. If
more than 1 litre of fluid is required to top
up the level, have the system checked by a
CITROËN dealer or a qualified workshop.
Windscreen wash and headlamp wash level
Capacity of the reservoir: approximately
5.5 litres.
For access to the reservoir filler cap, pull on
the telescopic filler pipe and unscrew the
cap a quarter of a turn.
For best quality cleaning and to prevent
freezing, this fluid must not be topped up or
replaced with plain water.
In wintry conditions, the use of an alcohol or
methanol based fluid is recommended.
For access to the header tank filler cap,
remove the protective cover by removing its
three fixing screws.
If fluid has to be added frequently, this
indicates a failure which must be checked by
a CITROËN dealer or a qualified workshop
as soon as possible.