2009 Citroen C4 DAG brake

25
I
I N S T R U M E N T S a n d C O N T R O L S
"Foot on brake" The fl ashing of this warning
lamp on the display informs
you that you need to press
the brake pedal in order to
be able to start the engine on a ve-
hicle with the (6-speed) Electronic
Gearbox System, or to move out of
position P in the case of an automatic
gearbox.
It may also fl ash to prompt you to
brake when engaging reverse gear.
In the case of the Electronic Gearbox
System, this warning lamp fl ashes to
indicate overheating of the clutch if
you use the accelerator excessively
to hold the vehicle on an uphill slope.
Use the brake pedal instead.
Electric child lock
If lit, the child lock is activa-
ted. This warning lamp is dis-
played a few seconds after
the function is activated. Deactivation warning lamps
If one of the following warning lamps
comes on, this confi rms that the
corresponding system has been
switched off intentionally.
Passenger's air bag system
deactivation
Dynamic stability control
(ESP/ASR) deactivation
The ESP/ASR system is put
into service automatically
when the vehicle is started.
A specifi c button, located on the
dashboard, permits deactivation of
the system. This is confi rmed by
continuous lighting of this warning
lamp and of the indicator lamp on
the button.
From approximately 30 mph (50 km/h),
the system is reactivated automatically. Warning lamps
Diesel engine pre-heating
Wait until this has gone out
before operating the starter.
The passenger's air bag sys-
tem is put into service auto-
matically when the vehicle is
started.
A specifi c control, located in the glove
box, permits deactivation of the sys-
tem. This is confi rmed by continuous
lighting of this warning lamp on the
instrument panel or a message on
the NaviDrive multifunction screen. When the engine is running or the
vehicle is moving, the lighting of
one of the following warning lamps
indicates the occurrence of a fault
requiring action on the part of the
driver.
Any fault resulting in the displaying
of a warning lamp must be investi-
gated further by reading the associa-
ted message on the multifunction
screen.
Should you encounter any problems,
do not hesitate to contact a CITROËN
dealer.

26
I
I N S T R U M E N T S a n d C O N T R O L S Maximum coolant temperature If this comes on, it indicates
that the temperature in the
cooling system is too high.
Stop the vehicle as soon as
it is safe to do so.
Low fuel level When the tank is full, all the
bars are lit.
If the fuel low warning lamp
comes on accompanied by
an audible signal and a message on
the multifunction screen, there are
approximately 7 litres of fuel remain-
ing in the tank and the 2 or 3 bars
fl ash on the instrument panel.
When the last bar goes out, there
are approximately 2 litres of fuel re-
maining in the tank.
Lighting is associated
with the lighting of an-
other warning lamp:
Service If this comes on, it
indicates the occur-
rence of a problem
in one of the systems
which does not have
a specifi c warning lamp.
It is accompanied by a message on
the multifunction screen.
The warning lamp comes on tempo-
rarily in the case of minor faults.
In the case of major faults, the warning
lamp remains on until the operating
fault is rectifi ed. Contact a CITROËN
dealer as soon as possible. Braking
If this comes on, it indicates
the occurrence of a fault in
one of the braking systems:
- signifi cant drop in the fl uid level in the circuit,
- electronic brake force distribu- tion (EBFD) faulty (simultane-
ous lighting of the ABS warning
lamp),
Stop the vehicle as soon as it is safe
to do so.
Contact a CITROËN dealer.
Dynamic stability control
(ESP/ASR)
The ESP/ASR system is put
into service automatically
when the vehicle is started.
Unless the system has been de-
activated, if this warning lamp and
the indicator lamp on the button
come on continuously, this indi-
cates the occurrence of a fault in the
ESP/ASR system or in the hill start
assistance. Engine autodiagnostics system
If this comes on, it indicates
the occurrence of a fault in
the engine management
system.
If it fl ashes, it indicates the occur-
rence of a fault in the emission control
system.
Central alert
- punctured wheel,
- braking,
- coolant temperature,
Stop the vehicle as soon as it is safe
to do so.
Contact a CITROËN dealer.
Anti-lock braking system (ABS) If this comes on, it indicates
the occurrence of a fault in
the anti-lock braking system.
However, this does not prevent op-
eration of the vehicle's servo-assist-
ed braking system.

25
I
I N S T R U M E N T S a n d C O N T R O L S
"Foot on brake" The fl ashing of this warning
lamp on the display informs
you that you need to press
the brake pedal in order to
be able to start the engine on a ve-
hicle with the (6-speed) Electronic
Gearbox System, or to move out of
position P in the case of an automatic
gearbox.
It may also fl ash to prompt you to
brake when engaging reverse gear.
In the case of the Electronic Gearbox
System, this warning lamp fl ashes to
indicate overheating of the clutch if
you use the accelerator excessively
to hold the vehicle on an uphill slope.
Use the brake pedal instead.
Electric child lock
If lit, the child lock is activa-
ted. This warning lamp is dis-
played a few seconds after
the function is activated. Deactivation warning lamps
If one of the following warning lamps
comes on, this confi rms that the
corresponding system has been
switched off intentionally.
Passenger's air bag system
deactivation
Dynamic stability control
(ESP/ASR) deactivation
The ESP/ASR system is put
into service automatically
when the vehicle is started.
A specifi c button, located on the
dashboard, permits deactivation of
the system. This is confi rmed by
continuous lighting of this warning
lamp and of the indicator lamp on
the button.
From approximately 30 mph (50 km/h),
the system is reactivated automatically. Warning lamps
Diesel engine pre-heating
Wait until this has gone out
before operating the starter.
The passenger's air bag sys-
tem is put into service auto-
matically when the vehicle is
started.
A specifi c control, located in the glove
box, permits deactivation of the sys-
tem. This is confi rmed by continuous
lighting of this warning lamp on the
instrument panel or a message on
the NaviDrive multifunction screen. When the engine is running or the
vehicle is moving, the lighting of
one of the following warning lamps
indicates the occurrence of a fault
requiring action on the part of the
driver.
Any fault resulting in the displaying
of a warning lamp must be investi-
gated further by reading the associa-
ted message on the multifunction
screen.
Should you encounter any problems,
do not hesitate to contact a CITROËN
dealer.

25
I
I N S T R U M E N T S a n d C O N T R O L S
"Foot on brake" The fl ashing of this warning
lamp on the display informs
you that you need to press
the brake pedal in order to
be able to start the engine on a ve-
hicle with the (6-speed) Electronic
Gearbox System, or to move out of
position P in the case of an automatic
gearbox.
It may also fl ash to prompt you to
brake when engaging reverse gear.
In the case of the Electronic Gearbox
System, this warning lamp fl ashes to
indicate overheating of the clutch if
you use the accelerator excessively
to hold the vehicle on an uphill slope.
Use the brake pedal instead.
Electric child lock
If lit, the child lock is activa-
ted. This warning lamp is dis-
played a few seconds after
the function is activated. Deactivation warning lamps
If one of the following warning lamps
comes on, this confi rms that the
corresponding system has been
switched off intentionally.
Passenger's air bag system
deactivation
Dynamic stability control
(ESP/ASR) deactivation
The ESP/ASR system is put
into service automatically
when the vehicle is started.
A specifi c button, located on the
dashboard, permits deactivation of
the system. This is confi rmed by
continuous lighting of this warning
lamp and of the indicator lamp on
the button.
From approximately 30 mph (50 km/h),
the system is reactivated automatically. Warning lamps
Diesel engine pre-heating
Wait until this has gone out
before operating the starter.
The passenger's air bag sys-
tem is put into service auto-
matically when the vehicle is
started.
A specifi c control, located in the glove
box, permits deactivation of the sys-
tem. This is confi rmed by continuous
lighting of this warning lamp on the
instrument panel or a message on
the NaviDrive multifunction screen. When the engine is running or the
vehicle is moving, the lighting of
one of the following warning lamps
indicates the occurrence of a fault
requiring action on the part of the
driver.
Any fault resulting in the displaying
of a warning lamp must be investi-
gated further by reading the associa-
ted message on the multifunction
screen.
Should you encounter any problems,
do not hesitate to contact a CITROËN
dealer.

26
I
I N S T R U M E N T S a n d C O N T R O L S Maximum coolant temperature If this comes on, it indicates
that the temperature in the
cooling system is too high.
Stop the vehicle as soon as
it is safe to do so.
Low fuel level When the tank is full, all the
bars are lit.
If the fuel low warning lamp
comes on accompanied by
an audible signal and a message on
the multifunction screen, there are
approximately 7 litres of fuel remain-
ing in the tank and the 2 or 3 bars
fl ash on the instrument panel.
When the last bar goes out, there
are approximately 2 litres of fuel re-
maining in the tank.
Lighting is associated
with the lighting of an-
other warning lamp:
Service If this comes on, it
indicates the occur-
rence of a problem
in one of the systems
which does not have
a specifi c warning lamp.
It is accompanied by a message on
the multifunction screen.
The warning lamp comes on tempo-
rarily in the case of minor faults.
In the case of major faults, the warning
lamp remains on until the operating
fault is rectifi ed. Contact a CITROËN
dealer as soon as possible. Braking
If this comes on, it indicates
the occurrence of a fault in
one of the braking systems:
- signifi cant drop in the fl uid level in the circuit,
- electronic brake force distribu- tion (EBFD) faulty (simultane-
ous lighting of the ABS warning
lamp),
Stop the vehicle as soon as it is safe
to do so.
Contact a CITROËN dealer.
Dynamic stability control
(ESP/ASR)
The ESP/ASR system is put
into service automatically
when the vehicle is started.
Unless the system has been de-
activated, if this warning lamp and
the indicator lamp on the button
come on continuously, this indi-
cates the occurrence of a fault in the
ESP/ASR system or in the hill start
assistance. Engine autodiagnostics system
If this comes on, it indicates
the occurrence of a fault in
the engine management
system.
If it fl ashes, it indicates the occur-
rence of a fault in the emission control
system.
Central alert
- punctured wheel,
- braking,
- coolant temperature,
Stop the vehicle as soon as it is safe
to do so.
Contact a CITROËN dealer.
Anti-lock braking system (ABS) If this comes on, it indicates
the occurrence of a fault in
the anti-lock braking system.
However, this does not prevent op-
eration of the vehicle's servo-assist-
ed braking system.

96
VIII
S A F E T Y
TYRE UNDER-INFLATION DETECTION
Sensors fi tted in each valve check
the tyre pressure during driving and
trigger a warning in the event of
malfunction (speed above 12 mph
(20 km/h)).
Flat tyre The tyre under-infl ation detection
system is an aid to driving which
does not replace the vigilance or
responsibility of the driver. Puncture
The service warning lamp
comes on in the instru-
ment panel, accompanied
by an audible signal and
a message on the multi-
function screen locating
the wheel concerned.
Check the tyre pressures as soon as
possible. This check must be carried
out when the tyres are cold. The
STOP warning lamp
comes on in the instru-
ment panel, accompanied
by an audible signal and
a message on the multi-
function screen locating
the wheel concerned.
Stop immediately, avoiding any sud-
den movement of the steering wheel
and the brakes.
Change the damaged wheel (punc-
tured or very defl ated tyre), and
have the tyre pressure checked as
soon as possible.
Sensor(s) not detected or faulty
The service warning
lamp comes on in the
instrument panel, ac-
companied by an audible
signal and a message on
the multifunction screen
locating the wheel or wheels which
are not detected or indicating a fault
in the system.
Have the faulty sensor(s) checked
by a CITROËN dealer. All repairs and changing of tyres
on a wheel fi tted with this system
must be carried out by a CITROËN
dealer.
If, when changing a tyre, you in-
stall a wheel which is not detected
by your vehicle (example: fi tting
of snow tyres), you must have the
system reinitialised by a CITROËN
dealer.
This system does not eliminate
the need to have the tyre pres-
sure checked regularly (refer to the
"Technical data - § Identifi cation
markings" section) to ensure that
the optimum dynamic perform-
ance of the vehicle is maintained
and prevent premature wear of the
tyres, particularly in arduous driv-
ing conditions (heavy load, high
speed).
The tyre pressures must be
checked cold, at least once a
month. Remember to check the
pressure of the spare wheel.
The tyre under-infl ation detection
system may experience temporary
interference due to radio-electric
emissions on a frequency close to
that used by the system.
This message is also displayed
when one of the wheels is away
from the vehicle (being repaired) or
when one or more wheels without a
sensor are fi tted.
The spare wheel is not fi tted with a
sensor.

97
VIII
S A F E T Y
BRAKING ASSISTANCE SYSTEMS
Group of supplementary systems
which help you to obtain optimum
braking in complete safety in emer-
gency situations:
- anti-lock braking system (ABS),
- electronic brake force distribu-tion (EBFD),
- emergency braking assistance (EBA).
Anti-lock braking system
and electronic brake force
distribution
Linked systems which improve the
stability and manoeuvrability of your
vehicle when braking, in particular
on poor or slippery surfaces.
Activation
The anti-lock braking system comes
into operation automatically when
there is a risk of wheel lock.
Normal operation of the ABS may
make itself felt by slight vibration of
the brake pedal. Operating fault
When braking in an emergency,
press very fi rmly without releasing
the pressure. If this warning lamp comes
on, accompanied by an au-
dible signal and a message
on the multi-function screen,
it indicates a malfunction of the anti-
lock braking system which could re-
sult in loss of control of the vehicle
when braking.
If this warning lamp comes on,
together with the STOP and

ABS warning lamps, accom-
panied by an audible signal
and a message on the multifunction
screen, it indicates a malfunction of
the electronic brake force distribution
which could result in loss of control of
the vehicle when braking.

You MUST stop as soon as it is
safe to do so.
In both cases, contact a CITROËN
dealer.
When replacing wheels (tyres and
rims), ensure that they conform to
the manufacturer's recommenda-
tions. Emergency braking assistance
System which, in an emergency,
enables you to obtain the optimum
braking pressure more quickly, thus
reducing the stopping distance.
Activation
It is triggered by the speed at which
the brake pedal is pressed.
The effect of this is a reduction in
the resistance of the pedal and an
increase in braking effi ciency.
When braking in an emergency,
press fi rmly without releasing the
pressure.

98
VIII
S A F E T Y
TRAJECTORY CONTROL SYSTEMS
Anti-skid regulation (ASR) and
electronic stability programme
(ESP)
The anti-skid regulation (also known
as Traction Control) optimises
traction to prevent skidding of the
wheels, by acting on the brakes of
the driving wheels and on the en-
gine.
The electronic stability programme
acts on the brake of one or more
wheels and on the engine to keep
the vehicle on the trajectory required
by the driver.
Activation
These systems are activated auto-
matically each time the vehicle is
started.
They come into operation in the event
of a grip or trajectory problem. This is indicated by fl ashing
of this warning lamp on the
instrument panel. Deactivation
In exceptional conditions (starting a
vehicle which is bogged down, stuck
in snow, on soft ground...), it may be
advisable to deactivate the ASR and
ESP systems, so that the wheels
can move freely and regain grip.

 Press the "ESP OFF" button, lo-
cated in the centre of the dash-
board. Reactivation
These systems are reactivated au-
tomatically each time the ignition is
switched back on or from 30 mph
(50 km/h).

 Press the "ESP OFF" but-
ton again to reactivate them
manually.
If this warning lamp comes
on in the instrument panel
and the indicator lamp on the
button comes on, this indi-
cates that the ASR and ESP
systems are deactivated. Operating fault
If this warning lamp comes
on, accompanied by an au-
dible signal and a message
on the multifunction screen,
this indicates a malfunction of these
systems.
Have the systems checked by a
CITROËN dealer.
The ESP/ASR systems offer ex-
ceptional safety in normal driving,
but this should not encourage the
driver to take extra risks or drive at
high speed.
The correct functioning of these
systems depends on observation
of the manufacturer's recommen-
dations regarding the wheels (tyres
and rims), the braking components,
the electronic components and the
CITROËN assembly and operation
procedures.
After an impact, have these systems
checked by a CITROËN dealer.