2011 CITROEN C4 AIRCROSS check engine

209
8
Checks
petrol engines

The petrol engines are perfectly compatible
with E10 or E24 type petrol biofuels (containing10 % or 24 % ethanol), conforming to Europeanstandards EN 228 and EN 15376.
E85 type fuels (containing up to 85 % ethanol)
are reser ved exclusively for vehicles marketed
for the use of this type of fuel (BioFlex
vehicles). The quality of the ethanol mustcomply with European standard EN 15293.
For Brazil only, special vehicles are marketed
to run on fuels containing up to 100 % ethanol(E10 0 type).
Quality of the fuel used for
Diesel engines

The Diesel engines are per fectly compatible
with biofuels which conform to current andfuture European standards (Diesel fuel whichcomplies with standard EN 590 mixed with a
biofuel which complies with standard EN 14214)
available at the pumps (containing up to 7 %Fatty Acid Methyl Ester).
The B30 biofuel can be used in cer tain Diesel engines; however, this use is subject to strict
application of the special ser vicing conditions. Contact a CITROËN dealer or a qualified
workshop.
The use of any other type of (bio)fuel(vegetable or animal oils, pure or diluted,
domestic fuel...) is strictly prohibited (risk of
damage to the engine and fuel system). 1.6 litre petrol en
gines, even though they have
been designed to operate on 95 RON petrol,can accept 90 RON petrol without engine adjustments, but with a slight deterioration in performance.
2.0 litre petrol engines can accept 90 RON or higher petrol.

210
Checks











Running out of fuel (Diesel)
engine, the fuel system must be manuallyprimed if you run out of fuel; refer to thecorresponding Diesel engine compartment
view.



1.6 litre HDi engine
)
Fill the fuel tank with at least five litres of diesel. )
Open the bonnet.)
If necessary, unclip the styling cover for
access to the priming pump. ) Squeeze and release the priming pump
repeatedly until resistance is felt (there may
be resistance at the first press). ) Operate the star ter until the engine starts(if the engine does not star t at the first
attempt, wait around 15 seconds before
tr
ying again). ) If the engine does not star t after a few
attempts, operate the priming pump again
then start the engine. ) Clip the styling cover back in place. )
Close the bonnet.

211
8
Checks






Checking levels


Take care when working under the bonnet, as certain areas of the engine may be extremelyhot (risk of burns).

Oil level
The check is carried out with the dipstick.
This check will only be correct if the
vehicle is on level ground and theengine has been off for more than 30 minutes.
It is normal to top up the oil level between
two ser vices
(or oil changes). CITROËN
recommends that you check the level, and top
up if necessary, every 3 000 miles (5 000 km).
After topping up the oil, the check when switching on the ignition with the oil levelindicator in the instrument panel is not validduring the 30 minutes after topping up.
Engine oil change
Refer to the ser vicing booklet for details of theinterval for this operation.
In order to maintain the reliability 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'srecommendations.

If a level drops si
gnificantly, have the corresponding system checked by a CITROËN dealer or a qualified workshop.
Check all of these levels regularly, in line with the ser vicing booklet and the requirements of the warranty. Top them up if necessary, unless other wise indicated.
Dipstick

There are two marks on the dipstick:
A
= m
aximum
If you fill past this mark,contact a CITROËN dealer or a qualified workshop. B
= minimum
Never allow the level to fallbelow this mark.

212
Checks
The coolant level should be closeto the "MA X" mark but should never exceed it.

In addition, as the cooling system is pressurised,
wait at least one hour after switching off the engine before carrying out any work.
To a v o i d a ny risk of scalding, unscrew the cap by two turns to allow the pressure to drop.
When the pressure has dropped, remove the
cap and top up the level.

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


Fluid specifi cation

The coolant must conform to themanufacturer's recommendations. 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 ser vicing 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 cooling fan may start after switching off the engine: take care with ar ticles and
clothing that might become caught by the
fan blades.
When the engine is warm, the temperature of
the coolant is regulated by the fan.

214
Checks






Checks
12 V battery


Electrolyte level

For access to the battery, refer to the"12V bat tery" section.
The electrolyte level must bebetween the "LOWER LEVEL" and "UPPER LEVEL" marks.
Refer to the servicin
g booklet for
details of the replacement inter vals
for these components.
Air filter and passenger compartment filter
Replace the oil filter each time the engine oil is changed.
Refer to the servicing booklet for
details of the replacement inter val for
this component.
Oil filter
If necessary, top up using distilled water,
removing the battery cap from each cell.
Check the electrolyte level at least once a month.
When carrying out work on the battery, refer
to "12V battery" section for details of the
precautions to be taken before disconnectingthe battery and following its reconnection.
Unless other wise indicated, check these components in accordance with the ser vicin
g booklet and according to your engine.
Other wise, have them checked by a CITROËN dealer or a qualified workshop.
Dependin
g on the environment (e.g. dustyatmosphere) and the use of the vehicle (e.g. city driving), replace them twice as often if necessary.y A clogged passenger compar tment filter mayhave an adverse effect on the performance
of the air conditioning system and generate undesirable odours.

215
8
Checks
Manual gearbox
Refer to the servicing booklet for maintenance of the gearbox.
"CVT" gearbox
Refer to the servicing booklet for maintenance of the "CVT" gearbox.
Par ticle emissions filter (Diesel)

The star t of saturation of the particle filter is
indicated by the temporary illumination of this
warning lamp accompanied by a message in
the instrument panel screen.
As soon as the traffic conditions permit,regenerate the filter by driving at a speed of at least 25 mph (40 km/h) for about 20 minutes (with the 1.6 litre HDiengine the minimum speed is 36 mph(60 km/h)). If the warning lamp stays on, this indicates a low additive level.
On a new vehicle, the first particle filter regeneration operations may be accompanied by a "burning" smell, which is perfectly normal.Following prolonged operation of the vehicle at very low speed or at idle,
you may, in exceptional circumstances,notice the emission of water vapour at the exhaust on acceleration. This doesnot affect the behaviour of the vehicle or the environment.

216
Checks
Brake wear depends on the style
of driving, par ticularly in the case
of vehicles used in town, over shor t
distances. It may be necessary tohave the condition of the brakes checked, even between vehicle services.
Unless there is a leak in the circuit, a drop in
the brake fluid level indicates that the brake pads are worn.
Brake pads
For information on checking brake
disc wear, contact a CITROËN dealer
or a qualified workshop.
Brake disc wear
Parking brake
If excessive travel or a loss of effectiveness of this system isnoticed, the parking brake must be
checked, even between two services.
Only use products recommended by CITROËN or products of equivalent quality and specification.
In order to optimise the operationof units as impor tant as the brakingsystem, CITROËN selects and offers very specific products. To a v o i d d a m aging the electrical units, the use of a high pressure washer in the engine compar tment is strictlyprohibited.
Checking this system must be done by aCITROËN dealer or a qualified workshop.

.
321 Alphabetical index
ABS and EBFD systems ...............................146Accessories..................................................202Accessory socket, 12V ...................98, 100,101Access to bulbs.............................................181Active stability control (ASC)........................148Adjusting headlamps....................................137Adjusting head restraints ................................81Adjusting seat belt height..............................150Adjusting the steering wheel ...........................87Airbag, knee.......................................... 156, 158Airbags, curtain.....................................157,158Airbags, front......................................... 154, 158Airbags, lateral......................................156,158Air conditioning...............................................22Air conditioning, automatic.......................89, 92Air conditioning, manual ...........................89,90Air filter..........................................................r214Air flow............................................................22Air intake.........................................................92Air vents ..........................................................88Alarm...............................................................73Anti-lock braking system (ABS)....................146Anti-theft........................................................110Apple® player®.........................................266-268Armrest, front....................................82,98,101Armrest, rear...................................................r84ASC............................................................... 148Ashtray, por table.....................................98,100Audible warning ............................................ 145Audio-CD system..................................283-320Audio-telematics...................................223-282Audio-video...................................................236Audio streaming (Bluetooth).........269,307,308Audio system functions.........................224, 285Automatic illumination of headlamps ....132,134Automatic operation of hazard warninglamps..........................................................145
Automatic rain sensitive windscreen wipers .....140Automatic switching off of lighting ................134Auxiliary sockets..................102, 264,304,305
Capacity, fuel tank ........................................208CD changer...................................................r301CD MP3.................................................240, 299Central locking..........................................62,65Changing a bulb.....................................180-185Changing a fuse.....................................186-191Changing a wheel..................................174-179Changing a wiper blade................................195Changing the remote control battery..............68Changing the time.....................................54, 58Checking levels......................................211-213Checking the engine oil level........................211
A
C
Checks ..................................................205-216Child seats ............................................159-168Child lock.......................................................169Cigarette lighter.............................................r100Closing the boot........................................62, 71Closing the doors................................62,65, 70Colour screen .................................56, 224, 225Connectors, audio................102,264,304, 305Controls for air conditioning......................90, 92Copying a CD ................................................241Coolant............................................................46Coolant level.................................................212Courtesy lamp, front.....................................142Cour tesy lamp, rear......................................r143Cruise control................................................124Cup holder.......................................................r98CVT gearbox.........................................113,215
Battery ...................................................192,214
Battery, charging...........................................194Battery, remote control.............................68,69Bluetooth (telephone).............269-282, 309-319Bonnet...........................................................205Bonnet stay...................................................205Boot .................................................................71Boot lamp......................................................144Bottle holder....................................................r98Brake discs....................................................216Brake lamps ..................................................184Brake pads....................................................216Brakes...........................................................216Braking assistance system...........................146Bulbs (changing, type) ..........................180, 184
B
Daytime running lamps.........................134,182Deactivating ASC ..........................................148Deactivating the passenger airbag...............155Deactivation of the passenger and
rear window control switches .......................77Deadlocking ..............................................63, 65Defrosting..................................................96, 97Demisting..................................................96, 97Dials................................................................24Diesel additive level ......................................213Dimensions ...................................................221Dipped beam.................................132, 180,182Dipstick..........................................................211Direction indicators ...............145, 180,181, 184Doors .............................................60, 64, 67, 70Driving economically ......................................22DVD (mode)...........................................256,257
D