2016 Citroen C4 sensor

127
C4-2_en_Chap04_eclairage-et-visibilite_ed02-2015
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  
o

ff,   then   to   the   position   of   your   choice.
When
  the   driver's   door   is   opened,   a  
t

emporary   audible   signal   warns   you   that  
t

he   vehicle's   lighting   is   on.
They
  switch   off   automatically   after   a  
p

eriod which depends on the state of
charge
  of   the   battery   (entry   to   energy  
ec

onomy
 mo
de).
4
Lighting and visibility

129
C4-2_en_Chap04_eclairage-et-visibilite_ed02-2015
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 not 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.
4
Lighting and visibility

130
C4-2_en_Chap04_eclairage-et-visibilite_ed02-2015
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 "Keyless
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 functions   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.
Lighting and visibility

136
C4-2_en_Chap04_eclairage-et-visibilite_ed02-2015
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.
Operating fault
If an automatic rain sensitive wiper malfunction o
ccurs,   the   wipers   will   operate   in   intermittent  
m

ode.
Contact
  a   CITROËN   dealer   or   a   qualified  
w

orkshop. 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.
Lighting and visibility

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

192
C4-2_en_Chap06_conduite_ed02-2015
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.
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.
For m ore i nformation o n id entification m
arkings,   including   the   tyre   pressure  
l

abel,   refer   to   the   corresponding  
s

ection.
Driving
  with   under-inflated   tyres  
i

ncreases   fuel   consumption.
Driving

193
C4-2_en_Chap06_conduite_ed02-2015
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 alert is given by the fixed illumination   of   this   warning   lamp,  
a

ccompanied   by   an   audible   signal,  
a

nd   depending   on   equipment,   the  
d

isplay   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  
t

he   tyre.
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.
6
Driving

194
C4-2_en_Chap06_conduite_ed02-2015
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  
t

wo 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  
r

oad   sur 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
 
W
hen   switching   the   ignition   on   or   with  
t

he   engine   running,   press   this   button;   the  
i

ndicator   lamp   comes   on.
F  
P
ress   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.
Driving