2013 Citroen DS5 HYBRID4 cooling

45
Hybrid system

Air conditioning
QuestionAnswer

It seems to me that the vehicle runs less on electric when the heating or air conditioning is
operatin
g, is that right?
The demand for heating or air conditioning may require the star ting of the Diesel engine until thedesired level of comfort is attained.
Normal h
ybrid operation is simply put back. The period can be longer under low or very high
ambient temperatures.
It seems to me that when it is ver
y hot and the
air conditioning is working, the vehicle runs on electric for shor ter periods. Is that right? When it is hot, the periods when the Diesel en
gine is put on standby and the vehicle runs onelectric are necessarily restricted in order to limit the difference between the temperature in the
vehicle and the level of comfort selected.
In very hot weather, it is always possible to press the Eco OFF button (which brings the vehicle out of ZEV mode and prevents electric running or the stopping of the engine) to give preference to
temperature control (keeps the air conditioning running).

Special Hybrid4 features
QuestionAnswer
Can I tow with m
y hybrid vehicle and how much? A Hybrid4 vehicle can tow between 500 kg and 800 kg (see the "Towing" section).
This allows a jet ski or two-wheeler on a trailer to be towed, for example.
The "technical" reason for the limit is related to maintaining adequate cooling capacity for the internal combustion engine as well as the hybrid components that are also cooled by the engine's cooling system.
Wh
y does engine braking seem so strong? When you take your foot off the accelerator, the engine braking results mainly from the energyrecovery by the electric motor.
This leads to a higher level of deceleration than a conventional vehicle and so allows the recoveryof free energy.

51Hybrid system

This system does not work continuously,
but adapts the force of the fan cooling to the
requirements of the battery.
Its operation can be heard at the rear, even if
the vehicle is stopped after a run.
If the air intake is blocked, the battery mayoverheat, damaging the battery and causing a
loss of performance of the hybrid system.







Fan cooling of the high voltage battery


For the best use of the high voltagebattery, please follow these recommendations:


- do not obstruct the air intake withloose articles, otherwise, the battery may overheat, causing aloss of performance of the hybridsystem

- do not spill fluids, as this may cause damage to the battery.


The high voltage battery has an air cooling system, comprising an air intake(located on the side of the left hand rear seat) and a fan (located behind the lefthand boot trim panel).

Coolant temperature
gauge
With the hybrid system active:
- in zone A
, the temperature is correct,
- in zone B, the temperature is too high; the central STOP
warning lamp comes on,
accompanied by an audible signal and amessage in the instrument panel screen.You must stop as soon as it is safe to do so.Wait a few minutes before switching off the engine.
Contact a CITROËN dealer or a qualified
workshop.
A
fter driving for a few minutes, the temperature
and pressure in the cooling system increase.
To top up the level:
)
wait for the engine to cool, )
unscrew the cap by two turns to allow the
pressure to drop,
) when the pressure has dropped, remove
the cap,) top up the level to the "MAX" mark.

Be aware of the risk of burns whentopping up the cooling system. Do not fill above the maximum level (indicated on the reservoir).

107
Comfort
These have one position for use (up) and a stowed position (down).
They can also be removed.
To remove a head restraint: ) release the backrest using control 1,)
tilt the backrest 2
slightly forwards, )
pull the head restraint upwards to the stop, )
then, press the lug A.
Rear head restraints

Never drive with the head restraintsremoved; they must be in place and correctly adjusted.









Fan cooling of the high voltage battery


This system does not work continuously,
but adapts the force of the fan cooling to the
requirements of the battery.
Its operation can be heard at the rear, even if
the vehicle is stopped after a run.
If the air intake is blocked, the batter
y mayoverheat, damaging the battery and causing a
loss of performance of the hybrid system.
For the best use of the high voltage battery, please follow these recommendations: - do not obstruct the air intake with loose ar ticles, other wise, the battery may overheat, causing a loss of performance of the hybrid system- do not spill fluids, as this may cause damage to the battery.
The high voltage battery has an air cooling system, comprising an air intake
(located on the side of the left hand rear seat) and a fan (located behind the lefthand boot trim panel).

119Comfort
4. Automatic visibilityprogramme


For maximum cooling or heating of thepassenger compar tment, it is possibleto exceed the minimum value 14 or themaximum value 28.)
Turn control 2or 3
to the left until "LO"is displayed or to the right until "HI"
is displayed. See "Front demistin
g - defrosting".


2-3. Driver's-passenger's side
settings
The driver and front passenger can each adjust the temperature to their requirements.
The value indicated on the display corresponds to a level of comfor t and not to a
temperature in degrees Celsius or Fahrenheit.
)Turn control 2or 3to the left or to the right respectively to decrease or increase this
value.

A setting around the value 21 provides
optimum comfort. However, depending on your
requirements, a setting between 18 and 24 isnormal.
You are advised to avoid a left / right settingdifference of more than 3.

Manual operation

If you wish, you can make a different choice from that offered by the system by changing asetting. The "AUTO"
indicator lamps go off; theother functions, except the air conditioning, willstill be controlled automatically.)
Pressing the "AUTO"
button returns the system to completely automatic operation.
With Stop & Start, when demisting hasbeen switched on, the Diesel engine does not stop.

We recommend the use of genuine
CITROËN towbars and their harnesses that have been tested and approved from the design stage of your vehicle,and that the fitting of the towbar is
entrusted to a CITROËN dealer or aqualified workshop.
If the towbar is not fitted by a CITROËN dealer, it is imperative that it isfitted in accordance with the vehiclemanufacturer's instructions.


Driving advice


Distribution of loads
)
Distribute the load in the trailer so that the
heaviest items are as close as possible to
t
he axle and the nose weight approaches the
maximum permitted without exceeding it.
Air density decreases with altitude, thus
reducing engine performance. Above
1 000 metres, the maximum towed load must
be reduced by 10 % for every 1 000 metres of altitude.


Side wind
)
Take into account the increased sensitivity
to side wind.



Cooling

To w i ng 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.)
To lower the engine speed, reduce your speed.
)
If the warning lamp and the STOPwarning lamp come on,stop the vehicle and switch off
the engine as soon as possible.

Braking

To w i ng a trailer increases the braking distance.
To avoid overheating of the brakes on a longmountain type of descent, the use of engine braking is recommended.

Tyres
)Check the tyre pressures of the towingvehicle and of the trailer, obser ving the recommended pressures.



Lighting
)Check the electrical lighting and signalling on the trailer.


The rear parking sensors will be deactivated automatically if a genuine CITROËN towbar is used.



Driving with a trailer places greater demands on the towing vehicle and thedriver must take par ticular care.

The maximum towed load on a long incline depends on the gradient and the ambient
tem
perature.
In all cases, keep a check on the coolant
temperature.

R
efer to the "Technical data" section for detailsof the weights and towed loads which apply toyour vehicle.

Checking levels


Ta k e c a r e w h e n w o r k i ng under the bonnet, as certain areas of the enginemay be extremely hot (risk of burns) and the cooling fan could star t at any time(even with the ignition off).
Oil level
The check is carried out either when
the ignition is switched on using the oil level indicator in the instrument panel, or using the dipstick.
It is normal to top up the oil level between two ser vices (or oil changes). CITROËN recommends that you checkthe level, and top up if necessary, every 3 000 miles (5 000 kms). After topping up the oil, the check when
switching on the ignition with the oillevel indicator in the instrument panelis not valid during the 30 minutes after topping up. If a level drops significantly, have the corresponding system checked by a CITRO
ËN dealer or a qualified workshop. Check all of these levels regularly, in line with the ser vicing booklet and the requirements of the warranties. Top them up if necessary, unless other wise indicated.





Before doing anything under the bonnet,switch off the ignition (Readylamp off) to avoid any risk of injury resulting from automatic operation of the engine.


Engine oil change

Refer to the servicing and warranty booklet for
details of the interval for this operation.
In order to maintain the reliabilit
y of the engine
and emission control system, the use of
additives in the engine oil is prohibited.


Oil specifi cation

The oil must be the correct grade for your engine and conform to the manufacturer's
recommendations. It will onl
y be correct if the vehicle is on level
ground and the engine has been off for more
than 30 minutes.

243Checks





Before doing anything under the bonnet,switch off the ignition (Ready
lamp off) to avoid any risk of injury resulting fromautomatic operation of the engine. Th
e brake fluid level should be close
to the "MA X" mark. If it is not, check
the brake pad wear.
Brake fluid level

Changing the fl uid

Refer to the servicing and warranty booklet for
details of the interval for this operation.

Fluid specifi cation

The brake fluid must conform to themanufacturer's recommendations and meet the
DOT3 or DOT4 standard.
The power steerin
g fluid level should be close to the "MA X" mark. With
the engine cold, unscrew the cap to check the level.
Power steering fluid levelCoolant level

The coolant level should be closeto the "MAX" mark but should never exceed it.
When the en
gine is warm, the temperature of
the coolant is regulated by the fan. This can
operate with the ignition off.
On vehicles which are fitted with a particle
emission filter, the fan may operate after
the vehicle has been switched off, even if
the en
gine is cold.
In addition, as the cooling system ispressurised, wait at least one hour after
switching off the engine before carryingout any work. To avoid any risk of scalding, unscrewthe cap by two turns to allow the pressure to drop. When the pressure has dropped, remove the cap and top upthe level.

Changing the coolant
The coolant does not have to be changed.


Fluid specifi cation

The coolant must conform to the
manufacturer's recommendations.