2008.5 Citroen JUMPER DAG brakes

Starting and stopping
HILL START ASSISTANCE
This function, linked with the ESP, makes hill
starts easier and is activated in the following
conditions:
- the vehicle must be stationary, engine
running, foot on the brake,
- the gradient of the road must be steeper
than 5 %,
- uphill, the gearbox must be in neutral or
in a gear other than reverse,
- downhill, reverse gear must be engaged.
The HHC (Hill Holder Control) or Hill Start
Assistance function is a driving comfort
feature. It is not an automatic vehicle
parking function or an automatic handbrake.
Operation
With the brake pedal and clutch pedal
pressed, from the time you release the brake
pedal you have approximately 2 seconds
before the vehicle starts to roll back and
without using the handbrake within which to
move off.
During the moving off phase, the function
is deactivated automatically, gradually
releasing the braking pressure. During
this phase, the typical noise of mechanical
disengaging of the brakes can be heard,
indicating the imminent movement of the
vehicle.
Anomaly
If a malfunction of the system
occurs, this warning light comes
on accompanied by an audible
signal and confi rmed by a
message on the display. Contact a CITROËN
dealer to have the system checked.
The hill start assistance is deactivated in the
following situations:
- when the clutch pedal is released,
- when the handbrake is applied,
- when the engine is switched off,
- when the engine stalls.

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.
DISARMING THE ASR SYSTEM
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.

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6
Towing a trailer
ACCESSORIES

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.