2011 Citroen C6 check engine

86
III
AUTOMATIC AIR CONDITIONING
AIR CONDITIONING
This system automatically adjusts the temperature, the fl ow of air and the distribution of air inside the cabin,
depending on your desired comfort level.
Provided
you retain automatic mode (by pressing button "AUTO") and all the air vents are open, you will main-
tain an optimum comfort level, also removing humidity
and misting, whatever the ambient climatic conditions.
The temperature inside the cabin cannot be lower than
the temperature outside if the air conditioning is not
operating.
To be e
ffective, the air conditioning should only be used
with the windows closed. If after a lengthy stop in bright sunlight the interior temperature is excessive, air the passenger compartment by opening the windows for a
few moments, then close them again.
To keep the air conditioning compressor well sealed,
it is essential to operate the air conditioning at least
once every month.
The air conditionin
g operates by using power from the engine. This results in a slight increase in fuel con-sumption.
Sensors
The automatic regulation of the air conditioning inside
the cabin makes use of a number of sensors, relieving you of the need to make adjustments, other than the desired cabin temperature.
Take care not to obstruct sensor A.
Air inlet
Check that the exterior grille for the air inlet, at the
bottom of the windscreen, is clean and free of dead
leaves, snow, etc.
If washing the vehicle with a high pressure jet, avoid
targeting the air inlet zone.
Air circulation
For your comfort we advise you to maintain a proper
distribution of air within the cabin, both at the front andat the rear.
Th
e air vents to the face have thumbwheels so thatyou can adjust the fl ow of air, and grilles to orient thedirection.
There are air vents on the fl oor underneath the frontseats and on the rear control panel, for enhanced heat-
ing of the rear seat positions.
Do not obstruct the air outlets located in the boot area.
Dust/pollen fi lter
There is a fi lter for excluding pollen and dust.
This
fi lter has to be changed according to the vehicle
maintenance schedule. See "Maintenance and WarrantyGuide".

88
III
AUTOMATIC AIR CONDITIONING
Remarks:When starting from cold, in order to prevent
unwanted cold air, the air fl ow will increase onlygradually to its optimum level.
If you enter the vehicle after a fairly prolongedstop and the temperature inside the vehicle is far from comfortable, it serves no purpose to modify
the temperature that is displayed as an attempt
to go immediately to the desired comfort level.
The system automatically uses all of its power tocompensate the temperature gap as quickly as possible.
Remarks:Water arising from the condensation in the air conditioning drains out through a hole provided for this purpose; a pool of water may thus form
underneath the vehicle when stationary.
Whatever the time of year, even in cool weather the
air conditioning is useful in removing humidity and
misting.
You are advised to have the air conditioning systemchecked on a regular basis. See "Maintenance andWarranty Guide".
If you are towing a heavy trailer and outside
temperatures are high, the air conditioning may be
temporarily paused if the engine cooling requires this.
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Manual mode
One or more functions can be adjusted manually, whilestill retaining the other functions in automatic mode.
To return to"AUTO" mode, press button 1.
Stopping the air conditioning
Turn the control4to the left until the air fl ow stops com-pletely. The symbol"OFF"appears on the screen.
The display and the warning lamps go out, indicatingdeactivation of all the functions, except for rear screen
demisting.
The com
fort level (temperature, humidity, odour, misting)is no longer controlled.
To reactivate the air conditioning, press button 1.
Avoid travelling for too long with the air conditioningdeactivated.

120
IV
A
This operation should only be
performed while the vehicle is
stat
ionary.
To release the bonnet, pull the con-
trol located under the dashboardtowards you.
Lift the leverA located under the bonnet close to the centre, then pull.
To close
Lower the bonnet carefully, then let it drop shut.
When the engine is hot, handle the lever A with care(risk of burns).
Check that the bonnet is properly secured.
OPENING THE BONNET

121
IVA
B
C
D
LEVELS
Air fi lter
Follow the requirements set out in the Maintenance and Warranty Guide.
REFER TO THE CHAPTER: USER PRECAUTIONS.
Screen wash and
headlamp wash fl uid
Use CITROËN-approved products wherever possible.
Capacity: See "Capacity".
Engine coolant
The fl uid level should be between the marks MIN.and
MAX. on the header tank.
Engine hot, wait at least
15 minutes.
Qualit
y: See "Maintenance and
Warranty Guide".
Never do anything relating to
the cooling system of an engine
that is hot.
Poles "+" and "-" for
starting with a slave battery
See "Starting with a slave battery".
Engine oil
Check the engine oil level on
horizontal ground with theengine having been switchedoff for at least 30 minutes.
It is normal to top up the engine oilbetween two services. The manu-facturer recommends that the oil bechecked and topped up if necessaryevery 3 000 miles (5 000 Km).
Qualit
y: See "Maintenance andWarranty Guide".
Pull out the manual dips-
tick.
The level should be between
the marks MIN.and MAX.on the gauge.
It must never exceed the maximum.
MAX.
MIN.
Brake fl uid
The level of fl uid should be between the marks MIN.andMAX. on the reservoir.
Quality: See "Maintenance and
Warranty Guide".
If this warning lamp comes on
when driving, stop as soon as it is safe to do so and contact a
CITROËN dealer or a qualifi ed
workshop.
Power steering andsuspension oil
For topping up, it is neces-sary to go to a CITROËN pp g p,
dealer or a qualifi ed workshop.
Quality: See "Maintenance and
Warranty Guide".
If opening the bonnet when the engine is hot, even if it is stopped and the ignition is switched off, remember thatthe cooling fan may operate at any moment.
Between routine servicing visits, check the level of engine oil frequently as well as before going on a longjourney.
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123
IVDB
1
1
TOPPING UP ENGINE OIL
Before fi lling, pull out the dipstick.
Check the dipstick after fi lling.
It must never exceed the maximum.
Screw the cap back on and close
the bonnet.
Quality: See "Maintenance andWarranty Guide".
LEVELS
RADIATOR – COOLANT FLUID
Checking the level and topping up
with fl uid must always be done with
the engine cold.
Engine hot
Wait 15 minutes or for the tempe-
rature to be lower than 100 °C and
then carefully unscrew the cap so as
to allow the pressure to drop, pro-
tectin
g yourself with, for example, a cloth.
Topping up the coolant
The level of coolant1 should bebetween theMIN.and MAX.mar-kings on the header tank.
To
p up the level. If more than 1 litre
is added, have the cooling systemchecked by a CITROËN dealer or ,gy
a qualifi ed workshop.
Make sure that the cap is back
on properly.Note:If you need to top up the fl uid frequently, this indicates a malfunc-tion which you should get checked
at the earliest opportunity.
Remark: The cooling fan mayoperate for around 10 minutesafter the engine has stopped.
Qualit
y:See "Maintenance and
Warranty Guide".
If opening the bonnet when the engine is hot, even if it is stopped and the ignition is switched off, remember that the cooling fan may operate at any moment.

126
IV
BC
A
i
12 V BATTERY
STARTING THE ENGINE WITH AN ASSISTING BATTERY
If the battery is discharged, it is possible to use either
a separate emergency battery or a battery on another
vehicle.
If you use the battery on another vehicle, stop the engine on the latter. The two vehicles must not come
into direct contact with each other.
Check that the assisting battery has suffi cient voltage (12 V).
Connect the cables according to the orderindicated in rthe diagram.
A Pole "+" on the vehicle being assisted (under the
red cover).
B Assisting battery.C Pole"-" on the assisted vehicle (under the bonnet).
Check that the leads are well secured (risk of sparks).
Start the engine of the assisting vehicle. Let the engine
run for around 1 minute at a slightly accelerated idle.
Operate the starter on the vehicle being assisted.
It is essential to follow the indicated sequencecorrectly.
Never approach with a fl ame or create sparks in the vicinity of the battery (explosive gas).
The battery contains dilute sulphuric acid which is highly corrosive.
When handling batteries, always protect your face and especially your eyes.
In the event of any contact with the skin, rinse immediately with copious amounts of fresh water.
ADVICE
Do not touch the leads during the operation.
Do not lean over the batteries.
Disconnect the cables in reverse order, making sure
they do not touch together.

144
V
TOWING WITH WHEELS ON THE GROUND
Towing eyes can be used at the front and at the rear of the vehicle.
Detach the cover:For the front cover, lever with a screwdriver at the top of the cover.
For the rear cover, press on the right hand side.
The ignition key must be in position M to retain steering.
Use a bar with attachments to the towing eyes as above.
The towing eye is removable, to be stowed in the jack protection box inside
the spare wheel.
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ADVICE
Towingat low speed over a veryshort distanceis authorised inexceptional cases depending on
the regulations in force.
Otherwise, it is necessary to
have
your vehicle transportedon a recovery truck.
It is essential to check that theelectric parking brake is released.
REQUIREMENT - TOWING
WITH AUTOMATIC GEARBOX
Place the selector on position N(neutral).
When the engine is not running, the steering and the braking are no longer assisted.
If you are towing another vehicle, the latter must be free-wheeling (gearbox in neutral).
Towing with "front or rear lifted"or in the "minimum height"position is prohibited.

7.39
SOLUTION RESPONSE

The environment (hills, buildings, tunnels, basement car parks...) blockreception, including in RDS mode.

The aerial is absent or has been damaged (for example when going through a car wash or into an underground car park).
This phenomenon is normal and does notindicate a failure of the audio equipment.

Have the aerial checked by a CITROËN dealer.
Sound cut-outs of 1 to 2 seconds in radiomode.

During this brief sound cut-out, the RDS searches for any frequency permitting better reception of the station.
Deactivate the RDS function if the phenomenon is too frequent and always on the same route.

With the engine off,the audio equipment switches off after a fewminutes of use.

When the engine is switched off, the audio equipment operating timedepends on the battery charge.

The switch-off is normal: the audio equipment switches to economy mode and switches off to prevent discharging of the vehicle's battery.
The stored stations do not function (nosound, 87.5 Mhz is displayed...)
.
An incorrect waveband is selected.
Press the BAND AST button to return to the waveband (AM, FM1, FM2, FMAST) on which the stations are stored.

Start the vehicle's engine to increase the battery charge.

The quality of reception of the radio station listened to gradually deteriorates or thestored stations do not function (nosound, 87.5 Mhz is displayed...).

The vehicle is too far from the transmitter used by the station listened to or there is no transmitter in the geographical area through which the vehicle is travelling.
Activate the RDS function to enable the system to check whether there is a more powerfultransmitter in the geographical area.