2016 Citroen C4 brakes

141
C4-2_en_Chap05_securite_ed02-2015
Trajectory control systems
Anti-slip regulation (ASR)
and dynamic stability
control (DSC)
The anti-slip regulation (also known as traction control)   optimises   traction   to   prevent   skidding  
o

f   the   wheels,   by   acting   on   the   brakes   of   the  
d

riving   wheels   and   on   the   engine.
The electronic stability control acts on the
brake
  of   one   or   more   wheels   and   on   the   engine  
t

o   keep   the   vehicle   on   the   trajectory   required  
b

y   the   driver,   within   the   limits   of   the   laws   of  
p

hysics.
Activation
These systems are activated automatically each   time   the   vehicle   is   started.
They
  come   into   operation   in   the   event   of   a   grip  
o

r
 t
rajectory
 pro
blem.
This
  is   indicated   by   flashing   of   this  
w

arning   lamp   in   the   instrument   panel.
Intelligent traction control
system ("Snow motion")
Deactivation
In extremely severe conditions (deep snow, mud,   ...),   if   you   are   unable   to   move   off,   it   may  
b

e   useful   to   temporarily   deactivate   these  
s

ystems   so   that   the   wheels   can   spin   freely   and  
a

llow   the   vehicle   to   move.
F
 
P
ress   this   button,   located   near   the   steering  
w

heel.
If
  the   indicator   lamp   in   the   button   comes   on,   this
 i

ndicates   that   these   systems   are   deactivated.
Depending
 
on
 
version,
 
your
 
vehicle
 
has
 
a
 
s

ystem
 
to
 
help
 
driving
 
on
 
snow:
 
intelligent
traction control .
This
 
system
 
detects
 
situations
 
of
 
difficult
 
s

ur face
 
adhesion
 
that
 
could
 
make
 
it
 
difficult
 
to
 
m

ove
 
off
 
or
 
make
 
progress
 
on
 
deep
 
fresh
 
snow
 
o

r
 
compacted
 
snow.
In these situations, the intelligent traction
control
 

limits
 
the
 
amount
 
of
 
wheel
 
slip
 
to
 
p

rovide
 
the
 
best
 
traction
 
and
 
trajectory
 
control
 
f

or
 
your
 
vehicle.
It  is   recommended   that   the   systems   be  
r

eactivated   as   soon   as   possible.
The
 
use
 
of
 
snow
 
tyres
 
is
 
strongly
 r
ecommended
 
on
 
sur faces
 
offering
 
low
 
l

evels
 
of
 
adhesion.
5
Safety

167
C4-2_en_Chap06_conduite_ed02-2015
When towing
Distribution of loads
F Distribute the load in the trailer so that the heaviest   items   are   as   close   as   possible   to t

he   axle   and   the   nose   weight   approaches   the
 m

aximum   permitted   without   exceeding   it.
Air density decreases with altitude,
thus
 r

educing
 e
ngine
 p
erformance.
 A

bove 1 000 metres,   the   maximum   towed  
l

oad   must   be   reduced   by   10 %   for   every  
1 0

00 metres   of   altitude.
Side wind
F Take  into   account   the   increased   sensitivity  t
o   side   wind.
For
  more   information   on   weights   (and   the  
t

owed   loads   which   apply   to   your   vehicle)   refer  
t

o   the   corresponding   section.
F  
I
f   the   warning   lamp   and   the  
S

TOP
 
warning   lamp   come   on,  
s

top the vehicle and switch off
the   engine   as   soon   as   possible.
Braking
Towing a trailer increases the braking distance.
T o   avoid   overheating   of   the   brakes,   the   use   of  
e

ngine   braking   is   recommended.
Ty r e s
F Check  the   tyre   pressures   of   the   towing  v
ehicle   and   of   the   trailer,   observing   the  
re

commended
 p
ressures.
Lighting
F Check  the   electrical   lighting   and   signalling  o
n   the   trailer   and   the   hadlamp   beam   height  
o

f   your   vehicle.
For
  more   information   on   adjusting   the  
h

eadlamp   beam   height,   refer   to   the  
c

orresponding
 s
ection.
The
  rear   parking   sensors   will   be  
d

eactivated   automatically   if   a   genuine  
C

ITROËN   towbar   is   used.
Cooling
Towing a trailer on a slope increases the temperature   of   the   coolant.
As
  the   fan   is   electrically   controlled,   its   cooling  
c

apacity   is   not   dependent   on   the   engine   speed.
F
 
T
o   lower   the   engine   speed,   reduce   your  
s

peed.
The
  maximum   towed   load   on   a   long   incline  
d

epends   on   the   gradient   and   the   ambient  
t

emperature.
In
  all   cases,   keep   a   check   on   the   coolant  
t

emperature.
6
Driving

183
C4-2_en_Chap06_conduite_ed02-2015
Moving off
If position N is engaged inadvertently while   driving,   allow   the   engine   to  
r

eturn   to   idle   then   engage   position   D to
accelerate. F

Sel
ect position D for automatic
 c
hanging
 o

f   the   six   gears.
The   gearbox   then   operates   in   auto-adaptive  
m

ode,   without   any   intervention   on   the   part  
o

f   the   driver.   It   continuously   selects   the   most  
s

uitable   gear   according   to   the   style   of   driving,  t
he profile of the road and the load in the
vehicle.
For
  maximum   acceleration   without   touching  
t

he selector, press the accelerator pedal down
fully
  (kick   down).   The   gearbox   changes   down  
a

utomatically   or   maintains   the   gear   selected  
u

ntil   the   maximum   engine   speed   is   reached.
On
  braking,   the   gearbox   changes   down  
a

utomatically   to   provide   effective   engine  
b

raking.
If you release the accelerator sharply, the
gearbox
  will   not   change   to   a   higher   gear   for  
s

afety   reasons.
When
  the   engine   is   running   at   idle,   with  
t

he   brakes   released,   if   position   R,
D
or
M   is   selected,   the   vehicle   moves  
e

ven   without   the   accelerator   being  
p

ressed.
Never leave children unsupervised in
the
  vehicle   when   the   engine   is   running.
When
  carrying   out   maintenance   with  
t

he   engine   running,   apply   the   parking  
b

rake   and   select   position   P.
Never select position N while the
vehicle
  is   moving.
Never select positions P or R unless the
vehicle
  is   completely   stationary.
If
  the   parking   brake   does   not   release  
a

utomatically,   check   that   the   front   doors  
a

re   fully   closed.
F
 
W

ith
 
your
 
foot
 
on
 
the
 
brake,
 
select
 
p

osition


P or N
.
F
 
S

tart
 
the
 
engine.
If this procedure is not followed, an audible
signal
 
is
 
heard,
 
accompanied
 
by
 
a
 
message
 
in
 
t

he
 
instrument
 
panel
 
screen.
F
 W
ith
 
the
 
engine
 
running,
 
press
 
the
 
brake
 ped
al.
F

Sel

ect position R , D or M.
Automatic operation
The parking brake is released manually, the v
ehicle   moves   off.
If
  the   parking   brake   is   on   and   automatic   mode  
i

s   activated,   accelerate   progressively.
If you do not press the brake pedal when trying   to   move   the   gear   selector   out o

f position P ,
  this   warning   lamp   or   this
 s

ymbol
 ap

pears
 in t
he
 in
strument
 pan
el
 a
ccompanied
 b

y
 
a
 
message,   flashing   of   the   P
 
symbol,   the   display   of
 a

 
message
  and   an   audible   signal.
F Check  that   the   display   in   the   instrument  p
anel   agrees   with   the   position   engaged.
F
 
G
radually   release   the   brake   pedal.
6
Driving

231
C4-2_en_Chap07_infos-pratiques_ed02-2015
Automatic gearbox
The gearbox does not require any maintenance   (no   oil   change).
Refer
  to   the   manufacturer's  
s

ervice schedule for details of
the
  level   checking   interval   for   this  
c

omponent.
Electric parking brake
This system does not require any routine   servicing.   However,   in  
t

he   event   of   a   problem,   have   the  
s

ystem   checked   by   a   CITROËN  
d

ealer   or   a   qualified   workshop.
Manual parking brake
If a loss of effectiveness of this
system i s  n oticed,  t he  p arking  b rake  
m

ust   be   checked,   even   between  
t

wo   services.
Brake pads
Brake wear depends on the style of   driving,   particularly   in   the   case  
o

f vehicles used in town, over short
distances.
  It   may   be   necessary   to  
Brake disc wear
For information on checking brake disc wear, contact a CITROËN
dealer
  or   a   qualified   workshop.
For
  more   information   on   the   electric   parking  
b

rake,   refer   to   the   corresponding   section.
Manual gearbox
The gearbox does not require any maintenance   (no   oil   change).
Refer
  to   the   manufacturer's   service  
s

chedule   for   the   checking   interval  
f

or   this   component.
Only
  use   products   recommended   by  
C

ITROËN   or   products   of   equivalent  
q

uality
 an
d
 sp
ecification.
In
  order   to   optimise   the   operation   of  
u

nits   as   important   as   those   in   the  
b

raking   system,   CITROËN   selects   and  
o

ffers   very   specific   products.
After
  washing   the   vehicle,   dampness,  
o

r   in   wintry   conditions,   ice   can   form  
o

n   the   brake   discs   and   pads:   braking  
e

fficiency   may   be   reduced.   Make   light  
b

rake   applications   to   dry   and   defrost  
t

he   brakes.
have
 
the
 
condition   of   the   brakes   checked,   even  
b

etween
 v

ehicle
 s
ervices.
Unless
 
there   is   a   leak   in   the   circuit,   a   drop   in  
t

he
 
brake
 
fluid   level   indicates   that   the   brake  
p

ads
 
are
 
worn. Checking
  this   system   must   be   done   by   a  
C

ITROËN   dealer   or   a   qualified   workshop.
7
Practical information