engine Citroen C4 DAG 2011 2.G Repair Manual

9
DRIVING
158
STOP & START
The Stop & Start system puts the en-
gine temporarily on standby - STOP
mode - during stops in the traffi c (red
lights, traffi c jams, or other...). The en-
gine restarts automatically - START
mode - as soon as you want to move
off. The restart takes place instantly,
quickly and silently.
Perfect for urban use, the Stop & Start
system reduces fuel consumption and
exhaust emissions as well as the noise
level when stationary.

Operation


Going into engine STOP mode
The "ECO"
warning lamp comes
on in the instrument panel and the
engine goes into standby:


- with a manual gearbox
, at speeds
below 12 mph (20 km/h), when you
put the gear lever into neutral and
release the clutch pedal, If your vehicle is fi tted with
the system, a time counter
calculates the sum of the pe-
riods in STOP mode during a
journey. It resets itself to zero every time
the ignition is switched on with the key.

- with the 6-speed electronic gear-
box system
, at a speed below
5 mph (8 km/h), when you press the
brake pedal or put the gear lever
into position N
. With the automatic gearbox
system, for your comfort dur-
ing parking maoeuvres, STOP
mode is not available for a few
seconds after coming out of re-
verse gear.
STOP mode does not affect the
functionality of the vehicle, such
as braking, power steering, for
example.
Special cases: STOP mode
unavailable
STOP mode is not invoked when:


- the driver's door is open,

- the driver's seat belt is not fastened,

- the vehicle has not exceeded 6 mph
(10 km/h) since the last engine start
using the key,

- the electric parking brake is applied
or being applied,

- the engine is needed to maintain a
comfortable temperature in the pas-
senger compartment,

- demisting is active,

- some special conditions (battery
charge, engine temperature, brak-
ing assistance, ambient tempera-
ture...) where the engine is needed
to assure control of a system.
In this case, the "ECO"
warning
lamp fl ashes for a few seconds,
then goes off. Never refuel with the engine in
STOP mode; you must switch off
the ignition with the key.

This operation is perfectly normal.

9
DRIVING
159

Deactivation

Going into engine START mode

At any time, press the "ECO OFF"
switch
to deactivate the system.
This is confi rmed by the switch warn-
ing lamp coming on accompanied by a
message on the screen.
Special cases: START invoked
automatically
If the system has been deacti-
vated in STOP mode, the engine
restarts immediately. The "ECO"
warning lamp goes
off and the engine starts:


- with a manual gearbox
, when you
depress the clutch pedal,

- with the 6-speed electronic gearbox
system
:


●
gear lever in position A
or M
, when
you release the brake pedal,

●
or gear lever in position N
and the
brake pedal released, when you
move the gear lever to position A

or M
,

●
or when you engage reverse gear.

START is invoked automatically when:


- you open the driver's door,

- you unfasten the driver's seat belt,

-
the speed of the vehicle exceeds
15 mph (25 km/h) with a manual
gearbox or 7 mph (11 km/h) with the
6-speed electronic gearbox system,

- the electric parking brake is being
applied,

- some special conditions (battery
charge, engine temperature, brak-
ing assistance, ambient tempera-
ture...) where the engine is needed
to assure control of a system.
In this case the "ECO"
warning
lamp fl ashes for few seconds,
then goes off.
With a manual gearbox in STOP
mode, if a gear is engaged with-
out fully depressing the clutch
pedal, a warning lamp comes
on or a message is displayed
asking you to depress the clutch
pedal to restart the engine.

Reactivation

Press the "ECO OFF"
switch again.
The system is active again; this is con-
fi rmed by the switch warning lamp go-
ing off and a message in the instrument
panel.
The system is reactivated auto-
matically at every new start using
the key.
This operation is perfectly normal.

9
DRIVING
160

Maintenance

In the event of a malfunction with the
system, the "ECO OFF"
switch warning
lamp fl ashes, then comes on continu-
ously.
have it checked by a CITROËN dealer
or a qualifi ed workshop.
In the event of a fault in STOP mode,
the vehicle may stall. It is then neces-
sary to switch off the ignition and start
the engine again using the key.


Operating fault

Before working under the bon-
net, deactivate the Stop & Start
system to avoid any risk of injury
resulting from automatic operation
of START mode.
This system requires a specifi c battery
with a special specifi cation and technol-
ogy (reference numbers available from
a CITROËN dealer or a qualifi ed work-
shop).
Fitting a battery not listed by
CITROËN introduces the risk of mal-
function of the system.
The Stop & Start system makes
use of advanced technology. All
work on this type of battery must
be done only by a CITROËN
dealer or a qualifi ed workshop.

10
CHECKS
175
BONNET

)
Push the exterior safety catch B
to
the left and raise the bonnet.

Opening



)
Open the front left door.

)
Pull the interior bonnet release le-
ver A
, located at the bottom of the
door aperture.

)
Unclip the stay C
from its housing.

)
Fix the stay in the notch to hold the
bonnet open. The location of the interior bonnet
release lever prevents opening
of the bonnet while the front left
door is closed.
Closing


)
Take the stay out of the support
notch.

)
Clip the stay in its housing.

)
Lower the bonnet and release it 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).





Before doing anything under
the bonnet, switch off the Stop
& Start system to avoid any risk
of injury resulting from an auto-
matic change to START mode.

10
176
RUNNING OUT OF FUEL(DIESEL)
If your vehicle is fi tted with an HDI engine,
the fuel system must be primed if you run
out of fuel; refer to the engine compart-
ment view on the "Diesel engine" page.

1.6 litre Turbo HDI engine



)
Fill the fuel tank with at least fi ve litres
of diesel.

)
Open the bonnet.

)
Squeeze and release the priming
pump repeatedly until it hardens (it
may be hard at the fi rst press).

)
Operate the starter until the engine
starts.

)
Close the bonnet.



)
Fill the fuel tank with at least fi ve litres
of Diesel.

)
Open the bonnet.

)
Unclip the style cover for access to
the priming pump.

)
Slacken the bleed screw.

)
Squeeze and release the priming
pump repeatedly until fuel appears
in the transparent pipe with the
green connector.

)
Retighten the bleed screw.

)
Operate the starter until the engine
starts.

)
Put the style cover back in position
and clip it in place.

)
Close the bonnet.
If the engine does not start fi rst
time, don't keep trying.
Operate the priming pump again,
then the starter motor.

10
177
PETROL ENGINES
The various caps and covers 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/Fuses.

6.
Fusebox.
7.
Air fi lter.

8.
Engine oil dipstick.

9.
Engine oil fi ller cap.

10
178
*
According to engine.
DIESEL ENGINES

The various caps and covers allow access for checking the levels of the various 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/Fuses.

6.
Fusebox.

7.
Air fi lter.
8.
Engine oil dipstick.

9.
Engine oil fi ller cap.

10.
Priming pump * .

11 .
Bleed screw * .

10
CHECKS
179
CHECKING LEVELS
Check all of these levels regularly and
top them up if necessary, unless other-
wise indicated.
If a level drops signifi cantly, have the corre-
sponding system checked by a CITROËN
dealer or a qualifi ed workshop.

When working under the bon-
net, take care, as certain areas
of the engine may be extremely
hot (risk of burns).

The reading will only be correct if
the vehicle is on level ground and
the engine has been off for more
than 30 minutes.
The check is carried out either when the igni-
tion is switched on using the oil level indicator
in the instrument panel, or using the dipstick.

Oil level


Engine oil change
Refer to the Maintenance and Warranty
Guide for the interval 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 correspond to your engine
and conform to the manufacturer's rec-
ommendations.



Brake fluid level

The brake fl uid level should be
close to the "MAX" mark. If it is
not, check the brake pad wear.

Changing the fl uid
Refer to the Maintenance and Warranty
Guide for the interval for this operation.

Fluid specifi cation
The brake fl uid must conform to the
manufacturer's recommendations and
meet the DOT4 standard.



Power steering fluid level

The power steering fl uid level
should be close to the "MAX"
mark. Unscrew the cap, with
the engine cold, to check the
level.
Coolant level

The coolant level should be
close to the "MAX" mark but
should never exceed it.
When the engine is warm, the
temperature of the coolant is regulated
by the fan. This can operate with the igni-
tion off.

On vehicles which are fi tted with a par-
ticle emission fi lter, the fan may oper-
ate after the vehicle has been switched
off, even if the engine 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, unscrew
the cap by two turns to allow the pres-
sure 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.

Coolant specifi cation
The coolant must conform to the manu-
facturer's recommendations.

10
CHECKS
180
Used products
Avoid prolonged contact of used
oil or fl uids with the skin.
Most of these fl uids are harmful
to health or indeed very corro-
sive.
Do not discard used oil or fl uids
into sewers or onto the ground.
Take used oil to a CITROËN
dealer or a qualifi ed workshop
(France) or to an authorised
waste disposal site.
Additive level (Diesel with particle emissions filter)

According to your version of instrument
panel, the additive reservoir low level is
indicated by:

Topping up
The reservoir must be topped up with-
out delay by a CITROËN dealer or a
qualifi ed workshop.


- fi xed illumination of the par-
ticle emissions fi lter warning
lamp, accompanied by an au-
dible signal and a message
that the particle emissions fi l-
ter additive level is too low,

- fi xed illumination of the
service warning lamp, ac-
companied by an audible
signal and a message that
the particle emissions fi lter additive level is too low. or

Screenwash/headlamp washlevel

Specifi cation of the fl uid
To ensure optimum cleaning and to
avoid freezing, the fl uid should never be
topped up or replaced by plain water.


To check the level or top up the
fl uid on vehicle fi tted with head-
lamp washers, immobilise the
vehicle and switch of the engine.


)
Open the bonnet and secure it with
the stay.

)
Open the screenwash reservoir fi ller
cap.

)
Take and pinch the level gauge to
block its breather.

)
Remove the gauge completely from
the reservoir to read the level in the
transparent section.

)
Top up if necessary.

)
Refi t the fi ller cap to the reservoir
and close the bonnet.

10
CHECKS
181
CHECKS
Unless otherwise indicated, check
these components in accordance with
the Maintenance and Warranty Guide
and according to your engine.
Otherwise, have them checked by a
CITROËN dealer or a qualifi ed workshop.


Battery

The battery does not require
any maintenance.

However, check that the ter-
minals are clean and correctly
tightened, particularly in sum-
mer and winter.
When carrying out work on the battery,
refer to the "Practical information" sec-
tion for details of the precautions to be
taken before disconnecting the battery
and following its reconnection.


Air filter and passenger compartment filter

Refer to the Maintenance and
Warranty Guide for details of
the replacement intervals for
these components.

Oil filter

Replace the oil fi lter each time
the engine oil is changed.
Refer to the Maintenance and
Warranty Guide for details of
the replacement interval for
this component.
Particle emission filter (Diesel)

According to your version of instrument
panel, the start of saturation of the par-
ticle emissions fi lter is indicated by:


- fi xed illumination of the par-
ticle emissions fi lter warning
lamp, accompanied by an au-
dible signal and a message
that there is a risk of blockage
of the particle emissions fi lter,






The presence of this label, in particular
with the Stop & Start system, indicates
the use of a specifi c 12 V lead-acid bat-
tery with special technology and speci-
fi cation, for which the involvement of a
CITROËN dealer or a qualifi ed work-
shop is required when replacing or dis-
connecting the battery.
Failure to observe this recommendation
may shorten the life of the battery.

Depending on the environment (e.g.
dusty atmosphere) and the use of the
vehicle (e.g. city driving), replace them
twice as often if necessary
(refer to
the "Engines" section).
A clogged passenger compartment fi l-
ter may have an adverse effect on the
performance of the air conditioning sys-
tem and generate undesirable odours.
As soon as the traffi c conditions per-
mit, regenerate the fi lter by driving at a
speed of at least 40 mph (60 km/h) until
the warning lamp goes off.
If the warning lamp stays on, refer to
the "Additive level" section.
Following prolonged operation
of the vehicle at very low speed
or at idle, you may, in excep-
tional circumstances, notice the
emission of water vapour at the
exhaust on acceleration. This
does not affect the behaviour of
the vehicle or the environment. or

-
temporary illumination of
the service warning lamp,
accompanied by an audible signal and a message that
there is a risk of blockage of
the particle emissions fi lter.