2008 Citroen JUMPER engine

52
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 rail 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 an additional passenger compartment
heating system which supplements the
standard equipment.
It can operate independently of the engine.
Depending on the level of finish of the
equipment, its start-up can be programmed.
Additional heater or programmable
heating
This is an additional and autonomous
system which heats the diesel engine hot
coolant loop to make starting easier.
It improves the de-icing and demisting
performance and that of the heated seats, if
fitted in 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 diode
is lit if the heating is activated.
When rapid de-icing and
demisting is required, switch off the control.

54
Ventilation
PROGRAMMABLE ADDITIONAL HEATING
If your vehicle is fitted with autonomous
programmable heating: it gradually brings
the engine up to a good temperature to
facilitate starting. An integrated clock permits programming of
its start time. The passenger compartment
will be heated more quickly. Heating cycle indicator light
Digital programming control
The programmable heating system control
panel is located at the bottom right of the
fascia panel. Display on
Displaying of the number of the
programme selected
Time display button
Time setting buttons
Selection of the stored
programme
Button for immediate switching
on of the heating
Time setting and reading
indicator light

56
Ventilation
Cancelling the programming Press this button briefly to clear
the programmed start time.
The display lighting 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 light 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 recommended replacement parts only.
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 display remain lit.
Switching off the heating
Press this button.
The heating cycle indicator light
and the display are switched off. Two different types of equipment
The additional heating is autonomous 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, de-icing and demisting.
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.

102
Driving safety
TRACTION CONTROL (ASR) AND DYNAMIC STABILITY CONTROL (ESP)
These systems are linked and complement
the ABS.
The ASR system is very useful for
maintaining optimum drive and avoiding
losses of control of the vehicle on
acceleration.
The system optimises drive to prevent the
wheels skidding, by acting on the brakes of
the drive wheels and on the engine. It also
allows the directional stability of the vehicle
to be improved on acceleration.
Use the ESP to hold your course without
attempting to countersteer. If there is a variation between the trajectory
followed by the vehicle and that required
by the driver, the ESP system automatically
acts on the engine and the brake of one
or more wheels, in order to put the vehicle
back on course.
In certain exceptional conditions (when
starting a vehicle stuck in mud or snow, or
on loose ground...), it could prove useful to
disarm the ASR system to make the wheels
spin and regain grip.
Operation of the ASR and ESP
systems The luminous diode flashes when
the ASR or ESP is triggered. Press this button.
The diode on the button comes on: the
ASR system no longer acts on the engine
operation, but continues to act on the brakes.
MALFUNCTION
When a malfunction of the ASR
system occurs, this warning light
comes on, accompanied by an
audible signal and confirmed by a
message on the display.

106
Improved safety and security
IMPROVED SAFETY AND SECURITY
IMPACT RESISTANCE
The RELAY has been designed to limit
the forces on the passenger compartment
as much as possible in the event of a
collision, the engine compartment adopts
a progressive deformation structure and
the front doors have been reinforced to
contribute to the rigidity of the whole.
ANTI-THEFT PROTECTION
The RELAY van comprises two zones with
separate locking: the cab and the load space.
Depending on the way in which it is used,
this function provides increased protection
both for your personal belongings and for
your merchandise.
Details of these functions are given in part 2. An exterior protection alarm with anti-lift
detection is available (as standard or as an
option) in certain countries.

kmC I T Y
108
Disarming the passenger air bag Refer to the "MODE" section of
chapter 4, then on the "Passenger air
bag" menu, select OFF .
When OFF is selected, the passenger air bag
will not be triggered in the event of an impact.
As soon as the child seat is removed, select

ON to re-activate the air bag and thus ensure
the safety of your passenger in the event of
an impact. Side air bags and curtain air bags
If your vehicle is fitted with side air bags,
these are incorporated into the front seat
backs on the door side.
The curtain air bags are incorporated into
the door pillars and the upper part of the
passenger compartment, in the roof over the
front cab seats.
They inflate between the occupant and the
glass.
They are deployed independently of each
other depending on which side the collision
occurs.
The air bag warning light on
the instrument panel comes on
throughout the period of disarming.
To ensure the safety of your child, it is
essential to disarm the passenger air bag
when you install a rear-facing child seat on
the front passenger seat. Otherwise, the
child would risk being killed or seriously
injured if the air bag were to inflate.
If your vehicle is not fitted with this
equipment: do not install a rear-facing child
seat. Disarming check
This is confirmed by lighting of
this warning light each time the
engine is started.
If your vehicle is fitted
with this display, the
check is accompanied by
a message. Operating check
Confirmed by this indicator light.
Air bags

kmC I T Y
108
Disarming the passenger air bag Refer to the "MODE" section of
chapter 4, then on the "Passenger air
bag" menu, select OFF .
When OFF is selected, the passenger air bag
will not be triggered in the event of an impact.
As soon as the child seat is removed, select

ON to re-activate the air bag and thus ensure
the safety of your passenger in the event of
an impact. Side air bags and curtain air bags
If your vehicle is fitted with side air bags,
these are incorporated into the front seat
backs on the door side.
The curtain air bags are incorporated into
the door pillars and the upper part of the
passenger compartment, in the roof over the
front cab seats.
They inflate between the occupant and the
glass.
They are deployed independently of each
other depending on which side the collision
occurs.
The air bag warning light on
the instrument panel comes on
throughout the period of disarming.
To ensure the safety of your child, it is
essential to disarm the passenger air bag
when you install a rear-facing child seat on
the front passenger seat. Otherwise, the
child would risk being killed or seriously
injured if the air bag were to inflate.
If your vehicle is not fitted with this
equipment: do not install a rear-facing child
seat. Disarming check
This is confirmed by lighting of
this warning light each time the
engine is started.
If your vehicle is fitted
with this display, the
check is accompanied by
a message. Operating check
Confirmed by this indicator light.
Air bags

117
6
ACCESSORIES
Towing a trailer

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 (see the "Identification
features" section of chapter 9) and of
the trailer, observing the recommended
pressure.
Towbar
We recommend the use of original
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.
If this equipment is not fitted by a
CITROËN dealer, it is imperative that it is
fitted using the electrical pre-equipment
installed at the rear of the vehicle and
in accordance 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 light comes on, stop the
vehicle and switch off the engine
as soon as possible.
See the "Levels" section of chapter 7.
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 assistance: the assistance
does not function while the vehicle is towing.