2014.5 Citroen C4 brakes

149
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.
8
Safety

181
Moving off
A message is displayed if you try to move   the   gear   lever   from   position   P to
another
  position   without   pressing   the  
b

rake
 ped
al. 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  
v

ehicle.
For   maximum   acceleration   without   touching  
t

he   lever,   press   the   accelerator   pedal   down  
f

ully   (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   efficient   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   even  
w

ithout   the   accelerator   being   pressed.
When   the   engine   is   running,   never  
l

eave   children   in   the   vehicle   without  
sup

ervision.
When   carrying   out   maintenance   with  
t

he   engine   running,   apply   the   parking  
b

rake   and   select   position   P
.
ne

ver select position N while the
vehicle
  is   moving.
ne

ver select positions P or R unless the
vehicle
  is   completely   stationary.
If position N
 
is
 
engaged
 
inadvertently
 
w

hile
 
driving,
 
allow
 
the
 
engine
 
to
 
r

eturn
 
to
 
idle
 
then
 
engage
 
position
 
D to
accelerate.
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,
 
there
 
is
 
an
 
a

udible
 
signal,
 
accompanied
 
by
 
a
 
message
 
in
 
t

he
 
multifunction
 
screen.
F
 
W

ith
 
the
 
engine
 
running,
 
press
 
the
 
brake
 
ped

al.
F
 
R

elease
 
the
 
parking
 
brake,
 
unless
 
it
 
is
 
p

rogrammed
 
to
 
automatic
 
mode.
F

Sel

ect position R
, D or M.
F
 
G

radually
 
release
 
the
 
brake
 
pedal.
The
 
vehicle
 
moves
 
off
 
immediately.
Automatic operation
9
Driving

216
Automatic
gearbox
The gearbox does not require any maintenance   (no   oil   change).
Refer
  to   the   manufacturer's  
s

ervice   schedule   for   details   of  
t

he   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  
d

istances.   It   may   be   necessary   to  
Brake disc
wear
For information on checking brake disc   wear,   contact   a   CITROËN  
d

ealer   or   a   qualified   workshop.For
  more   information,   refer   to   the   "Electric
 p

arking   brake   -   Operating   faults"   section.
Manual gearbox
The gearbox does not require any m
aintenance   (no   oil   change).
Refer
  to   the   manufacturer's   service  
s

chedule   for   the   checking   interval  
f

or   this   component.
Electronic gearbox
The gearbox does not require any maintenance   (no   oil   change).
Refer
  to   the   manufacturer's   service  
s

chedule   for   details   of   the   checking  
i

nterval   for   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.
Checks

262
F If  the   warning   lamp   and   the  S
TOP  warning   lamp   come   on,  
s

top   the   vehicle   and   switch   off  
t

he   engine   as   soon   as   possible.
Braking
Towing a trailer increases the braking distance.
T o   avoid   overheating   of   the   brakes   on   a   long  
m

ountain   type   of   descent,   the   use   of   engine  
b

raking   is   recommended.
Ty r e s
F Check   the   tyre   pressures   of   the  
towing   vehicle   and   of   the   trailer,   observing  
t

he
 re
commended
 p
ressures.
Lighting
F Check  the   electrical   lighting   and   signalling  o
n   the   trailer.
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   
c
oolant  
t

emperature.
Practical information