2015 Citroen C4 sensor

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In good or rainy weather, by both day and   night,   the   front   foglamps   and   the  
r

ear   foglamps   are   prohibited.   In   these  
s

ituations,   the   power   of   their   beams  
m

ay   dazzle   other   drivers.   They   should  
o

nly   be   used   in   fog   or   falling   snow.
In these weather conditions, you should
switch
  on   the   foglamps   and   dipped  
b

eam   headlamps   manually,   as   the  
s

unshine   sensor   may   detect   sufficient  
l

ight.
Do
  not   forget   to   switch   off   the   front   and  
r

ear   foglamps   when   they   are   no   longer  
n

ecessary.Switching off the lighting when
switching off the ignition
When the ignition is switched off, all of the lamps   switch   off   immediately,   except   for t

he   dipped   beam   headlamps   if   automatic
 g

uide-me-home   lighting   is   activated.
Switching on the lighting when
switching on the ignition
To reactivate the lighting control stalk, turn the   ring   A to position "0" 
-   lighting   off,   then   to t

he   position   of   your   choice.
If
  the   lighting   is   switched   on   manually   after
 s

witching   off   the   ignition,   there   is   an   audible
 s

ignal   when   a   front   door   is   opened   to   warn
 t

he   driver   that   they   have   forgotten   to   switch
 o

ff   the   vehicle's   lighting,   with   the   ignition   off.
They
  switch   off   automatically   after   a   period
 w

hich   depends   on   the   state   of   charge   of   the
 b

attery   (entry   to   energy   economy   mode).
6
Visibility

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Automatic illumination of
headlamps
The sidelamps and dipped beam headlamps are   switched   on   automatically,   without   any  
a

ction on the part of the driver, when a low level
of
  external   light   is   detected   or   in   certain   cases  
o

f   activation   of   the   windscreen   wipers.
As
  soon   as   the   brightness   returns   to   an  
a

dequate   level   or   after   the   windscreen   wipers  
a

re   switched   off,   these   lamps   are   switched   off  
a

utomatically   and   the   daytime   running   lamps  
c

ome   on.
Activation
F Turn   ring   A to the "AUTO"  position.   The  a
ctivation   of   the   function   is   confirmed   by  
t

he   display   of   a   message.
Deactivation
F Turn  ring   A to a position other than
"AUTO" .
  The   deactivation   of   the   function   is  
c

onfirmed   by   the   display   of   a   message.
Operating fault
In the event of a fault with the
sunshine  sensor,   the   lighting   come  
o

n,   this   warning   lamp   is   displayed  
o

n   the   instrument   panel   and/or   a  
m

essage   appears   in   the   screen,  
a

ccompanied   by   an   audible   signal.
Contact
  a   CITROËN   or   a   qualified  
w

orkshop   workshop.
In
 
fog   or   snow,   the   sunshine   sensor  
m

ay
 
detect   sufficient   light.   Therefore,  
t

he
 
lighting   will   not   come   on  
au

tomatically.
do n

ot cover the sunshine sensor,
coupled with the rain sensor and
located in the centre of the windscreen
behind
  the   rear   view   mirror;   the  
a

ssociated   functions   would   no   longer  
be c

ontrolled.
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Visibility

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Switching off
The welcome lighting switches off automatically after   a   programmed   time,   when   the   ignition   is  
s

witched   on   or   on   locking   the   vehicle.
Welcome lighting
Switching on
F Press  the   open   padlock   on   the  r
emote   control   or   one   of   the   front  
d

oor handles with the "
ke
yless
Entry
  and   Starting"   system.
The
 
remote   switching   on   of   the   lighting   makes  
y

our
 
access   to   the   vehicle   easier   in   poor   light.  
I

t
 
is
 
activated   depending   on   the   ambient   light  
l

evel
 
detected   by   the   sunshine   sensor.
The
 
sidelamps   and   dipped   beam   headlamps,  
a

s
 
well
 
as
  the   side   spotlamps,   located   under  
t

he
 
door
 
mirrors,   come   on;   your   vehicle   is   also  
u

nlocked.
Programming
activation or deactivation, as well as
the   duration   of   the   lighting   duration  
f

or   the   welcome   lighting   can   be   set  
v

ia   the   vehicle   configuration   menu.
Automatic
"Guide-me-home"
lighting
When the automatic illumination of headlamps f
unctions   is   activated,   if   the   ambient   light   level  
i

s   low   the   dipped   beam   headlamps   remain   on  
w

hen   switching   off   the   ignition.
Settings
activation and deactivation, as
well  as   the   duration   of   the   guide-
me-home
  lighting   can   be   set   in   the  
v

ehicle   configuration   menu.
Visibility

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Automatic rain sensitive
windscreen wipers
Briefly push stalk A downwards.
Switching onSwitching off
Briefly push stalk A downwards
ag ain. The
  automatic   rain   sensitive  
w

indscreen   wipers   must   be   reactivated  
i

f   the   ignition   has   been   off   for   more   than  
o

ne minute.
The
 
instruction
 
is
 
confirmed
 
by
 
a
 
wiping
 
cycle,
 
a

ccompanied
 
by
 
illumination
 
of
 
this
 
warning
 
l

amp
 
in
 
the
 
instrument
 
panel
 
and
 
an
 
activation
 
m

essage. The
 
instruction   is   confirmed   by   this   warning  
l

amp
 
going   off   in   the   instrument   panel   and/or  
t

he
 
display   of   a   deactivation   message.
The
 
windscreen
 
wipers
 
operate
 
automatically,
 
w

ithout any action on the part of the driver, if
rain
 
is
 
detected
 
(sensor
 
behind
 
the
 
rear
 
view
 
m

irror),
 
adapting
 
their
 
speed
 
to
 
the
 
intensity
 
of
 
t

he
 
rainfall.
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Visibility

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Operating fault
If an automatic rain sensitive wiper malfunction occurs,   the   wipers   will   operate   in   intermittent  
m

ode.
Contact
  a   CITROËN   dealer   or   a   qualified  
w

orkshop.
Windscreen and headlamp
wash
Low screenwash / headlamp
wash fluid level
On vehicle fitted with headlamp washers, the low   level   of   this   fluid   is   indicated   by   gauge   in  
t

he   reservoir   filler   neck   under   the   bonnet.
Checking
  and   topping   up   this   fluid   can   should  
b

e   done   with   the   engine   off.
The
  level   of   this   fluid   should   be   checked  
r

egularly,
 par
ticularly
 d
uring
 w
inter.
Refer
  to   "Checks   -   Screenwash   /   headlamp  
w

ash level" section for the procedure on
checking
  the   level.
F
 
P

ull
 
the
 
windscreen
 
wiper
 
stalk
 
towards
 
y

ou.
 
The
 
windscreen
 
wash
 
then
 
the
 w
indscreen
 
wipers
 
operate
 
for
 
a
 
fixed
 p
eriod.
The
 
headlamp
 
washers
 
only
 
operate
 
when
 
the
dipped or main beam headlamps are on, with
the vehicle moving .
Do
 
not
 
cover
 
the
 
rain
 
sensor,
 
linked
 
with
 t

he sunshine sensor and located in the
centre of the windscreen behind the rear
view
 
mirror.
Switch
 
off
 
the
 
automatic
 
rain
 
sensitive
 w

ipers
 
when
 
using
 
an
 
automatic
 
car
 
wash.
In winter, it is advisable to wait until the
windscreen
 
is
 
completely
 
clear
 
of
 
ice
 b

efore
 
activating
 
the
 
automatic
 
rain
 sen

sitive
 w

ipers. To
 
reduce
 
the
 
consumption
 
of
 
the
 
fluid
 
b

y
 
the
 
headlamp
 
washers,
 
they
 
operate
 
o

nly with every seventh use of the
screenwash
 
or
 
every
 
25
 
miles
 
(40
 
km)
 
d

uring
 
a
 
given
 
journey.
Visibility

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Tyre under-inflation detection
System which automatically checks the p
ressures   of   the   tyres   while   driving.
The
  system   continuously   monitors   the  
p

ressures of the four tyres, as soon as the
vehicle
  is   moving.
a

pressure sensor is located in the valve of
each
  tyre   (except   the   spare   wheel).
The
  system   triggers   an   alert   if   a   drop   in  
p

ressure   is   detected   in   one   or   more   tyres.
The
  tyre   under-inflation   detection   system   is   an  
a

id   to   driving   which   does   not   replace   the   need  
f

or   vigilance   on   the   part   of   the   driver.This
  system   does   not   avoid   the   need  
t

o   check   the   tyre   pressures   regularly  
(

including   the   spare   wheel)   and   before  
a

  long   journey.
Driving   with   under-inflated   tyres  
a

dversely   affects   road   holding,  
e

xtends   braking   distances   and   causes  
p

remature   tyre   wear,   particularly   under  a
rduous   conditions   (vehicle   loaded,  h
igh   speed,   long   journey).The tyre pressures for your vehicle can
be
  found   on   the   tyre   pressure   label   (see  
t

he   "Identification   markings"   section).
The   tyre   pressures   must   be   checked  
w

hen   the   tyres   cold   (vehicle   stopped  
f

or   1   hour   or   after   driving   for   less   then  
6

  miles   (10   km)   at   moderate   speed).  
O

ther wise,   add   0.3   bar   to   the   values  i
ndicated   on   the   label.
Driving   with   under-inflated   tyres  
i

ncreases   fuel   consumption.
driving

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The flashing and then fixed illumination   of   the   under-inflation w

arning   lamp   accompanied   by   the
 i

llumination   of   the   service   warning
 l

amp   indicates   a   fault   with   the   system.
Operating fault
The aler t  is  given  by  the  fixed  illumination o
f   this   warning   lamp,   accompanied   by a

n   audible   signal,   and   depending   on
 e

quipment,   the   display   of   a   message.
Under-inflation alert
In the event of a problem on one of the tyres, the   symbol   or   the   message   appears,   according  
t

o   equipment,   to   identify   it.
F
 
R
educe   speed,   avoid   sudden   steering  
m

ovements   or   harsh   brake   applications.
F
 
S
top   as   soon   as   it   is   safe   to   do   so. In
  this   case,   monitoring   of   the   tyre   pressures   is  
n

ot   assured.
F  
I
f   you   have   a   compressor   (the   one   in   the  
t

emporary   puncture   repair   kit   for   example),  
c

heck   the   four   tyre   pressures   when   cold.
 I

f   it   is   not   possible   to   check   the   tyre  
p

ressures   at   the   time,   drive   carefully   at  
r

educed
 s
peed.


or
F
I
n the event of a puncture, use the
temporary   puncture   repair   kit   or   the   spare  
w

heel   (according   to   equipment).
Go   to   a   CITROËN   dealer   or   a   qualified  w
orkshop to   have   the   system   checked   or,  
f

ollowing   the   repair   of   a   puncture,   to   have   the  
o

riginal   wheel,   equipped   with   a   sensor,   refitted.
Any
  tyre   repair   or   replacement   on   a   wheel  
f

itted   with   this   system   must   be   carried   out   by   a  
C

ITROËN   dealer   or   a   qualified   workshop.
If
  after   changing   a   tyre,   a   wheel   is   not   detected  
b

y   your   vehicle   (fitting   snow   tyres   for   example),  
y

ou   must   have   the   system   reinitialised   by   a  
C

ITROËN   dealer   or   a   qualified   workshop.
The loss of pressure detected does not
always
  lead   to   visible   deformation   of   the  
t

yre.   Do   not   rely   on   just   a   visual   check.This alert is also displayed when one or
more
  wheels   is   not   fitted   with   a   sensor  
(

for   example,   a   space-saver   or   steel  
spar

e
 w
heel).
The   alert   is   maintained   until   the   tyre   or  t
yres concerned is reinflated, repaired
or
  replaced.
The
  spare   wheel   (space-saver   type   or   a  
s

teel   rim)   does   not   have   a   sensor.
9
Driving

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Lane departure warning system
Activation
Deactivation
DetectionOperating fault
System which detects the involuntary crossing o
f   longitudinal   traffic   lane   markings   on   the  
g

round   (solid   or   broken   line).
Sensors,
  fitted   below   the   front   bumper,   trigger  
a

  warning   if   the   vehicle   drifts   over   a   lane  
m

arking   (speed   higher   than   50   mph   (80   km/h)).
This
  system   is   particularly   useful   on   motor ways  
a

nd   main   roads. In
  the   event   of   a   malfunction,   the  
s

ervice   warning   lamp   comes   on,  
a

ccompanied   by   an   audible   signal  
a

nd   a   message   in   the   screen.
Contact   a   CITROËN   dealer   or   a   qualified  
w

orkshop.
The   lane   departure   warning   system  
c

annot   in   any   circumstances   replace  
t

he   need   for   vigilance   on   the   part   of   the  
d

river.
It
  is   necessary   to   observe   driving  
r

egulations   and   take   a   break   every  
two
  hours. The
  detection   may   be   impeded:
- i f   the   sensors   are   dirty   (mud,   snow...),
-
 i

f   the   markings   on   the   ground   are
 w

orn,
-
i

f there is little contrast between the
markings
  on   the   ground   and   the   road
 s

ur face.
You
  are   warned   by   the   vibration   of   the   driver's  
s

eat   cushion:
-
 
o
n   the   right-hand   side,   if   the   marking   on  
t

he   ground   has   been   crossed   on   the   right,
-
 
o
n   the   left-hand   side,   if   the   marking   on   the  
g

round   has   been   crossed   on   the   left.
No
  warning   is   transmitted   while   the   direction  
i

ndicator   is   active   and   for   approximately  
2

0 seconds after the direction indicator is
switched
  off.
A
  warning   may   be   transmitted   if   a   direction  
m

arking   (e.g.   arrow)   or   non-standard   marking  
(

e.g.   graffiti)   is   crossed.
F

Press this button, the indicator lamp comes on.
F Press
  this   button   again,   the   indicator   lamp  g
oes   off.
The
  status   of   the   system   remains   in   the  
m

emory   when   the   ignition   is   switched   off.
9
Driving