2010 CITROEN DS4 coolant temperature

18
Warning/indicator lampis on Cause Action/Observations
STOP fixed, alone or
associated with
another warning lamp,
accompanied by an
audible signal and a
message in the screen. Illumination of this warning lamp is
associated with a serious fault with
the braking system, power steering,
engine lubrication system or cooling
system.
Stop as soon as it is safe to do so as there is a risk that
the engine will cut out while driving.
Park, switch off the ignition and contact a CITROËN
dealer or a qualified workshop.
Maximum coolant
temperature fixed.
The temperature of the cooling system
is too high. Stop as soon as it is safe to do so.
Wait until the engine has cooled down before topping-
up the level, if necessary.
If the problem persists, contact a CITROËN dealer or
qualified workshop.
Engine oil
pressure fixed.
There is a fault with the engine
lubrication system. You must stop as soon it is safe to do so.
Park, switch off the ignition and contact a CITROËN
dealer or a qualified workshop.
* Depending on country of sale. Seat belt not
fastened /
unfastened*
fixed, then flashing,
accompanied by an
increasing audible
signal. The driver or front passenger has not
buckled or has unbuckled their seat
belt.
Pull on the belt in question and insert the tongue in the
buckle.
This warning repeats the seat belt information given by
the roof console warning lamps.
At least one rear passenger has
unbuckled their seat belt.
01
Instruments

185
When towing
Distribution of loads
F Distribute the load in the trailer so that the heaviest items are as close as possible to
the axle and the nose weight approaches
the maximum permitted without exceeding
it.
Air density decreases with altitude, thus
reducing engine per formance. Above
1
000 metres, the maximum towed load must
be reduced by 10
% for every 1 000 metres of
altitude.
Side wind
F Take into account the increased sensitivity to side wind.
Cooling
Towing a trailer on a slope increases the
temperature of the coolant.
As the fan is electrically controlled, its cooling
capacity is not dependent on the engine speed.
F

T
o lower the engine speed, reduce your
speed.
The maximum towed load on a long incline
depends on the gradient and the exterior
temperature.
In all cases, keep a check on the coolant
temperature.
F

I
f the warning lamp and the STOP
warning lamp come on, stop the
vehicle and switch off the engine
as soon as possible.
Braking
Towing a trailer increases the braking distance.
To avoid overheating of the brakes, the use of
engine braking is recommended.
Ty r e s
F Check the tyre pressures of the towing vehicle and of the trailer, observing the
recommended pressures.
Lighting
F Check the electrical lighting and signalling on the trailer and the headlamp beam
height of your vehicle.
For more information on Adjusting the
headlamp beam height , refer to the
corresponding section.
For more information on Weights
, refer
to the corresponding section.
The rear parking sensors will be
deactivated automatically to avoid the
audible signal if a genuine CITROËN
towbar is used.
If the exterior temperature is high, it
is recommended that the engine be
allowed to idle for 1 to 2 minutes after
the vehicle comes to a stop, to facilitate
its cooling.
06
Driving

247
Coolant level
Check the coolant level regularly.
It is normal to top up this fluid
between services.
To ensure that the measurement is reliable, the
vehicle must be parked on level ground and the
engine must be cold.
The cooling fan may star t after
switching off the engine: take care
with articles and clothing that might
be caught by the fan blades.
The coolant level should be close to the "MA X"
mark but should never exceed it.
If the level is close to or below the "MIN" mark,
it is essential to top up.
A low coolant level presents a risk of serious
damage to your engine. When the engine is hot, the temperature of the
coolant is regulated by the fan.
When the engine is hot, as the cooling system is
pressurised, wait at least one hour after switching
off the engine before carrying out any work.
To avoid the risk of scalding in the event of an
urgent need to top up, with a cloth around the
cap, unscrew it by two turns to allow the pressure
to drop.
Once the pressure has dropped, remove the cap
and top up the level.
Fluid specification
The coolant must conform to the
manufacturer's recommendations.
07
Practical information