2010 Citroen C4 Owner's Manual

121
IX
D R I V I N G
VISUAL AND AUDIBLE FRONT AND/OR REAR PARKING SENSORS
System consisting of four proximity
sensors, installed in the front and/or
rear bumper.
It detects any obstacle (person, ve-
hicle, tree, barrier...) located behind
the vehicle, however, it will not be
able to detect obstacles located im-
mediately below the bumper.
An object, such as a stake, a road-
works cone or any other similar ob-
ject may be detected at the start of
the manoeuvre but may no longer
be detected when the vehicle moves
nearer to it. The parking sensors are
switched
off :
- when you exit reverse gear,
- when the speed is higher than 6 mph (10 km/h) in forward gear,
- when the vehicle has been station- ary for more than three seconds in
forward gear.
The parking sensor system cannot,
in any circumstances, replace the
need for vigilance and responsibility
on the part of the driver.
The parking sensors are
switched
on :
- by engaging reverse gear,
- at a speed below 6 mph (10 km/h) in forward gear.
This is accompanied by an audible
signal and display of the vehicle on
the multifunction screen.
The proximity information is indica-
ted by:
- an audible signal which be- comes more rapid as the vehicle
approaches the obstacle,
- a diagram on the multifunction screen, with blocks which move
closer to the vehicle.
The obstacle is located in relation to
the emission of the audible signal by
the speakers; front or rear and right
or left.
When the distance between the ve-
hicle and the obstacle is less than
approximately thirty centimetres, the
audible signal becomes continuous
and/or the "Danger" symbol appears,
depending on the multifunction screen
version.

122
D R I V I N G
In bad weather or in winter, ensure
that the sensors are not covered
with mud, ice or snow. When re-
verse gear is engaged, an audible
signal (long beep) indicates that
the sensors may be dirty.
When the vehicle is being driven
at a speed below approximately
6 mph (10 km/h), certain sourc-
es of noise (motorcycles, lorries,
pneumatic drills, ...) may trigger the
parking sensor audible signals.
Reactivation

 Press button A again, the warning
lamp switches off, the system is
reactivated.
Deactivation Operating fault
If an operating fault occurs, this warn-
ing lamp is displayed on the instrument
panel and/or a message appears on
the multifunction screen, accompa-
nied by an audible signal (short beep),
when reverse gear is engaged.
Consult a CITROËN dealer.

 Press button A , the warning lamp
comes on, the system is fully de-
activated.
The system will be deactivated au-
tomatically when a trailer is being
towed or when a bicycle carrier is
fi tted (vehicle fi tted with a towbar
or bicycle carrier recommended by
CITROËN).

124
X
C H E C K S
BONNET
Protects the components of the
engine and provides access for
checking levels.
Opening
 Push the exterior safety catch B
to the left and raise the bonnet.

 Unclip the stay C from its housing.

 Fix the stay in the notch to hold
the bonnet open. Closing

 Take the stay out of the support
notch.

 Clip the stay in its housing.

 Lower the bonnet then slam it
fi rmly at the end of its travel.

 Pull on the bonnet to check that
it is secured correctly.
When the engine is hot, handle the
exterior safety catch and the bonnet
stay with care (risk of burns). This operation must only be carried
out when the vehicle is stationary.
Avoid opening the bonnet in strong
winds.

 Pull to the right the interior re-
lease lever A , located under the
dashboard.

125
X
C H E C K S
BLEEDING THE DIESEL FILTER
Protective cover
Removal

 Remove the protective cover by
unclipping fi rst point 1 , then 3
and 4 .

 Unclip point 2 pulling towards
you, then lift.
Refi tting

 Clip point 2 fi rst.

 Lower the cover, centring it.

 Clip points 1 and 4 , pushing ver-
tically and slightly rearwards.

 Clip point 3 , pushing vertically. Bleeding water from
the fuel filter
Bleed on a regular basis (at every
oil change).
To evacuate the water, slacken the
bleed screw or the water-in-diesel-
fuel sensor, which is located at the
base of the fi lter.
Continue until water ceases to fl ow
out.
Then retighten the bleed screw or
the water-in-diesel-fuel sensor.

126
C H E C K S
RUNNING OUT OF FUEL (DIESEL)
HDi 135 and 140 engine
Detach the protection cover to gain
access to the priming pump. HDi 90 and 110 engine
Detach the protection cover to gain
access to the priming pump. Priming the fuel system
In the event of running out of fuel:

 after fi lling (minimum 5 litres),
squeeze the manual priming
pump repeatedly, until some re-
sistance is felt,

 then operate the starter, gently
pressing the accelerator until the
engine starts.
If the engine fails to start at the fi rst
attempt, wait 15 seconds before
trying again.
If the engine fails to start after a few
attempts, repeat the procedure from
the beginning. When the engine is
idling, accelerate gently to complete
the purge of the circuit.
HDi engines are of a highly
technical nature.
All maintenance and re-
pairs require specialist knowledge
which only your CITROËN dealer
can assure.

127
X
C H E C K S
PETROL ENGINES
The covers and caps allow access for checking the levels of the various fl uids and for replacing certain components.

1. Power steering reservoir.

2. Screenwash and headlamp wash
reservoir.
3. Coolant reservoir.

4. Brake fl uid reservoir.

5. Battery.
6. Fusebox.

7. Air fi lter * .

8. Engine oil dipstick.

9. Engine oil fi ller cap.
* According to engine.

128
X
C H E C K S * According to engine.
DIESEL ENGINES
The covers and caps allow access for checking the levels of the vari ous fl uids, for replacing certain components and for
priming the fuel system.

1. Power steering reservoir.

2. Screenwash and headlamp
wash reservoir.

3. Coolant reservoir.

4. Brake fl uid reservoir.

5. Battery.
6. Fusebox.

7. Air fi lter * .

8. Engine oil dipstick.

9. Engine oil fi ller cap.

10. Priming pump * .

11. Bleed screw * . As the diesel fuel system is
pressurised, any work on
this system is prohibited.

129
X
C H E C K S
CHECKING LEVELS
Check all of these levels regularly
and top them up if necessary, unless
otherwise indicated.
If a level drops signifi cantly, have the
corresponding system checked by a
CITROËN dealer.
Take care when working under the
bonnet, as some parts of the engine
can be extremely hot (risk of burns).
Oil level
Oil change
Refer to the Maintenance and
Warranty Guide for details of the in-
terval for this operation. Oil specifi cation
The oil must correspond to your engine
and conform to the manufacturer's
recommendations.
Brake fluid level
Fluid change
Refer to the Maintenance and
Warranty Guide for details of the in-
terval for this operation.
This fl uid must be changed regu-
larly. Fluid which has been used for
too long may cause a loss of braking
effi ciency.
Fluid specifi cation
The brake fl uid must conform to the
manufacturer's recommendations
and fulfi l the DOT4 standards.
Coolant level
Coolant change
The coolant does not have to be
changed.
Fluid specifi cation
The coolant must conform to the
manufacturer's recommendations.
The reading will only be
correct if the vehicle is on
level ground and the engine
has been off for more than
15 minutes.
The check is carried out either when
the ignition is switched on using the
oil level indicator on the instrument
panel, or using the dipstick.
Check this level also between each
scheduled service and before long
journeys. The brake fl uid level should
be close to the "MAX" mark.
If it is not, check the brake
pad wear.
The coolant level should be
close to the "MAX" mark but
should never exceed it.
When the engine is warm, the tem-
perature of the coolant is regulated
by the fan. This can operate with the
ignition off.

On vehicles which are fi tted with
a particle emission fi lter, the fan
may operate after the vehicle has
been switched off, even if the en-
gine is cold.
In addition, as the cooling system is
pressurised, wait at least one hour
after switching off the engine before
carrying out any work.
To avoid any risk of scalding, un-
screw the cap by two turns to al-
low the pressure to drop. When the
pressure has dropped, remove the
cap and top up the level.
In order to maintain the re-
liability of the engine and
emission control system,
the use of additives in the engine
oil is prohibited.