2015 Citroen C4 PICASSO Owner's Manual

167
The active cruise control uses only engine braking   to   slow   the   vehicle.   Consequently   the  
v

ehicle   looses   speed   slowly,   as   when   releasing  
t

he   accelerator   pedal.
The
  system   is   paused   automatically:
-
 
i
f   the   vehicle   in   front   slows   down   to   much  
o

r   too   suddenly,   and   the   driver   does   not  
b

rake,
-
 
i
f   a   vehicle   comes   between   your   vehicle  
a

nd   the   vehicle   in   front,
-
 
i
f   the   system   does   not   slow   the   vehicle  
e

nough   to   continue   to   maintain   a   safe  
d

istance,   for   example   when   descending   a  
s

teep   hill.
Limits of operation
As the radar's field of view is quite narrow, it is possible   that   the   system   may   not   detect:
The
  cruise   control   does   not   take   account   of:
-
 
s
tationary   vehicles,
-
 
v
ehicles   driving   in   the   opposite   direction.
-
 
v
ehicles   of   reduced   width,   such   as  
m

otorcycles,   for   example,
-
 
v
ehicles   not   running   in   the   middle   of   the  
lan

e, -
 
v
ehicles   entering   a   corner,
-
 
v
ehicles   changing   lane   at   the   last   moment.
The
 
regulation
 
range
 
is
 
limited
 
to
 
a
 
maximum
 
d

ifference
 
of
 
20
 
mph
 
(30
 
km/h)
 
between
 
the
 
s

peed
 
setting
 
and
 
the
 
speed
 
of
 
the
 
vehicle
 
a

head.
 
Above
 
this,
 
the
 
system
 
goes
 
into
 
pause
 
i

f
 
a
 
safe
 
distance
 
is
 
not
 
maintained.
Severe
 
weather
 
conditions
 
(very
 
heavy
 
r

ain,
 
accumulations
 
of
 
snow
 
in
 
front
 
o

f
 
the
 
radar)
 
can
 
inter fere
 
with
 
the
 
o

peration
 
of
 
the
 
system,
 
resulting
 
in
 
t

he
 
display
 
of
 
the
 
message
 
"SYSTEM
 
I

NACTIVE:
 
Visibility
 
reduced".
 
The
 
f

unction
 
remains
 
unavailable
 
until
 
the
 
m

essage
 d

isappears.
4
Driving

168
In the event of a fault with the active cruise
control,  you   are   alerted   by   an   audible   signal  
a

nd   display   of   the   message   message   "Driving  
a

id   functions   fault".
Have
  the   system   checked   by   a   CITROËN  
d

ealer   or   a   qualified   workshop. When
  the   cruise   control   is   working,   take  
c

are   if   making   a   maintained   press   on  
o

ne   of   the   cruise   control   programmed  
s

peed   modification   buttons:   this   can  
l

ead   to   a   very   quick   change   in   the  
s

peed   of   your   vehicle.
do n

ot use the active cruise control on
slippery
  sur faces   or   in   heavy   traffic.
When
  descending   a   steep   hill,   the  
c

ruise   control   may   not   be   able   to  
p

revent   the   vehicle   from   exceeding   the  
pro

grammed
 s
peed.
When
  ascending   a   steep   hill   or   when  
t

owing,   it   might   not   be   possible   to   attain  
o

r   maintain   the   programmed   speed.
The
  use   of   mats   not   approved   by  
C

ITROËN   may   inter fere   with   the  
o

peration   of   the   cruise   control.
To
  avoid   any   risk   of   jamming   the   pedals:
-
 
e
nsure   that   mats   are   secured  
c

o r r e c t l y,
-
 
n
ever   fit   one   mat   on   top   of   another.
Operating fault
The operation of the radar, located in the   front   bumper,   may   be   disturbed   by  
a

ccumulations   of   grime   (dust,   mud...)  
o

r   in   certain   weather   conditions   (snow,  
i

ce...).
The
  message   "SYSTEM   INACTIVE:  
V

isibility   reduced"   is   displayed   to   signal  
t

hat   the   system   has   been   put   into  
s

t a n dby.
Clean
  the   front   bumper   regularly.
driving

169
Collision risk alert
System providing a warning to the driver that their vehicle is at risk of collision with the vehicle in front.
T he   collision   risk   alert   system   can   be   activated  
o

r   deactivated   by   the   driver.
From
  the   secondary   page   of   the   "Driving
assistance "
  menu:
F

s
elect the "Vehicle settings "
  menu,
F
 
c
heck   the   "Collision risk alert "
  line   and  
c

onfirm.
This
  system   has   been   designed   to  
i

mprove   driving   safety.
It
  is   the   responsibility   of   the   driver   to  
k

eep   a   constant   check   on   the   state   of  
t

he   traffic,   to   assess   the   relative   speed  
a

nd   distance   of   other   vehicles.
The
  collision   risk   alert   system   can   never  
r

eplace   the   need   for   vigilance   on   the  
p

art   of   the   driver.
This
  system   operates   from   20   mph  
(

30 km/h),   only   when   other   vehicles   are  
r

unning   in   the   same   direction   as   your  
v

ehicle;   the   system   does   not   detect  
s

tationary   objects.   A   radar   is   fitted   at  
t

he   front   of   the   vehicle. The
  alert   thresholds   determine   how   you   want   to  
b

e   alerted   to   the   presence   of   a   vehicle   running  
i

n   front   of   you.
You
  can   choose   from   three   thresholds:
-
 
1
:   
"
Distant",   to   be   given   an   early   alert  
(

cautious
 d
riving).
-
 
2
:   "Normal".
-
 
3
:   
"
Close",   to   be   given   a   later   alert   (sporty  
d

riving).
Setting the thresholds for
the alert
This function can be deactivated permanently   by   a   CITROËN   dealer   or   a  
q

ualified
 w
orkshop.
From
  the   secondary   page   of   the   "Driving
assistance "
  menu:
F

s
elect the "Vehicle settings "
  menu,
F
 
c
heck   the   "Collision risk alert " line,
F
 
p
ress   on   the   magnifying   glass,
F
 
m
odify   the   alert   threshold   and   press   on  
"F

inish"
  to   memorise   the   threshold   and  
l

eave   the   menu.
4
Driving

170
The change from one level of alert to   the   next   takes   place   if   the   driving  
c

onditions   do   not   change   (speed  
u

nchanged,   no   change   of   lane...)
Severe
  weather   conditions   (very   heavy  
r

ain,   accumulation   of   snow   in   front  
o

f   the   radar)   may   inter fere   with   the  
o

peration   of   the   system,   resulting   in  
t

he   display   of   the   message   "System
inactive: Reduced visibility ".
  The  
s

ystem   remains   unavailable   until   the  
m

essage
 d
isappears.
If
  the   speed   of   your   vehicle   is   too   high  
w

hen   approaching   another   vehicle,   the  
f

irst   level   of   alert   may   not   be   displayed:  
t

he   level   2   alert   may   be   displayed  
d

i r e c t l y.
On
  the   other   hand,   the   level   1   alert  
i

s   never   displayed   with   the   triggering  
t

hreshold   3   (close).
Alerts
According to the collision risk detected by the system   and   the   alert   threshold   chosen,   three  
l

evels   of   alert   can   be   triggered.
Level 1 :
  visual   alert   only   (orange)  
i

ndicating   that   the   vehicle   in   front   is  
v

ery   close.   The   message   "Vehicle
close "
  is   displayed.
Level 2 :
  visual   (red)   and   audible  
a

lerts   indicating   that   a   collision   is  
i

mminent.   The   message   "Brake! " is
displayed.
This
  level   of   alert   is   based   on   the   inter-vehicle  
t

ime   between   your   vehicle   and   the   one   in   front.
This
  level   of   alert   is   based   on   a   time   before  
c

ollision.   It   takes   account   of   the   vehicle  
d

ynamics,   the   speed   of   your   vehicle   and  
t

he   speed   of   the   vehicle   in   front,   the   driving  
c

onditions,   the   situation   with   your   vehicle  
(

cornering,   pedals   pressed,   etc.)   to   trigger   the  
a

lert   at   the   right   moment. Level 3
:   an   increase   in  t
he   tension   of   the   driver's  
s

eat   belt,   to   hold   the   driver  
a

gainst   the   backrest   of   their  
sea

t.
The
  3
rd level of alert is not triggered or i
s
 
interrupted   in   the   event   of   an   impact  
b

etween   the   two   vehicles.
The increase in the tension of the
driver's
  seat   belt   is   intended   only   as   an  
a

lert:
 
it
  does   not   in   any   circumstances  
a

ssure
  the   function   of   driver   safety.
The
 
triggering   of   this   alert   does   not   act  
o

n
 
the
 
safety   functions   provided   by   the  
s

eat
 
belts.
Driving

171
Operating fault
In the event of a fault, you are
alerted  by   the   display   of   the   Service  
w

arning   lamp,   accompanied   by   a  
m

essage.
Consult
  a   CITROËN   dealer   or   a  
q

ualified
 w
orkshop.
The
 
operation   of   the   radar,   located   in  
t

he
 
front   bumper,   may   be   disturbed   by  
a

ccumulations   of   grime   (dust,   mud...)  
o

r
 
in
 
certain   weather   conditions   (snow,  
i

ce...).
The
 
message   "SYSTEM   INACTIVE:  
V

isibility   reduced"   is   displayed   to   signal  
t

hat
 
the   system   has   been   put   into  
s

t a n dby.
Clean
  the   front   bumper   regularly.
4
Driving

172
Lane departure warning system
System which, using a camera which recognises   solid   or   broken   lines,   detects   the  
i

nvoluntary   crossing   of   longitudinal   traffic   lane  
m

arkings   on   the   ground.
To
  provide   safe   driving,   the   camera   analyses  
t

he   image   then,   if   the   driver's   attention   drops,  
t

riggers   a   warning   if   the   vehicle   drifts   over  
a

  lane   marking   (speed   higher   than   50   mph  
(

80 km/h)).
This
  system   is   particularly   useful   on   motor ways  
a

nd   main   roads. Activation
  and   deactivation   of   the   function   is  
d

one   in   the   touch   screen   tablet.
Activation / deactivation
Detection - alert
The driver is alerted by vibration of the seat belt (
at   the   level   of   the   reel).
No
  warning   is   transmitted   while   the   direction  
i

ndicator   is   active   and   for   approximately  
2

0 seconds   after   the   direction   indicator   is  
s

witched   off.
The
 
lane
 
departure
 
warning
 
system
 
c

annot,
 
in
 
any
 
circumstances,
 
replace
 
t

he
 
need
 
for
 
vigilance
 
and
 
responsibility
 
o

n
 
the
 
part
 
of
 
the
 
driver. F

I
n the Driving assistance
 
menu,  
p

ress   this   button;   its   indicator  
l

amp   comes   on.
The   function   is   activated.
The   detection   may   be   impeded:
-  
i
f   the   markings   on   the   ground   are  
w

orn,
-  i f   there   is   little   contrast   between   the  m
arkings   on   the   ground   and   the  
r

oad   sur face,
-
 
i
f   the   windscreen   is   dirty,
-
 
i
n   certain   severe   weather  
c

onditions:   fog,   heavy   rain,   snow,  
b

right   sunlight   or   direct   exposure  
t

o   the   sun   (low   sun,   leaving   a  
t

unnel, ...)   and   shade.
In
  the   event   of   a   fault,   the   symbol  
f

or   the   button   changes   to   alert  
m

ode   and   the   warning   lamp   flashes  
f

or   a   few   moments   then   goes   off.
Operating fault
Contact a CITROËN dealer or a qualified w
orkshop.
F
 
P

ress
 
this
 
button
 
again;
 
its
 
i

ndicator
 
lamp
 
goes
 
off.
The
 
function
 
is
 
deactivated.
It
 
is
 
necessary
 
to
 
observe
 
the
 
driving
 
r

egulations
 
and
 
to
 
take
 
a
 
break
 
every
 
t

wo
 
hours. The
 
status
 
of
 
the
 
system
 
remains
 
in
 
the
 
m

emory
 
when
 
the
 
ignition
 
is
 
switched
 
off.
Driving

173
Blind spot sensors
Operation
A warning lamp appears in the door mirror on the   side   in   question:
-
 
i
mmediately,   when   being   overtaken,
-
 
a
fter   a   delay   of   about   one   second,   when  
ov

ertaking   a   vehicle   slowly.
This
 
driving
 
assistance
 
system
 
warns
 
the
 
driver
 o
f
 
the
 
presence
 
of
 
another
 
vehicle
 
in
 
the
 
blind
 
s

pot
 
angle
 
of
 
their
 
vehicle
 
(areas
 
masked
 
from
 
t

he
 
driver's
 
field
 
of
 
vision),
 
as
 
soon
 
as
 
this
 
p

resents
 
a
 
potential
 
danger. Sensors
  fitted   in   the   front   and   rear   bumpers  
m

onitor   the   blind   spots.
This
 
system
 
is
 
designed
 
to
 
improve
 
safety
 
when   driving   and   is   in   no   circumstances   a  
s

ubstitute
 
for
 
the
 
use
 
of
 
the
 
interior
 
rear
 
view
 
mirror   and   door   mirrors.   It   is   the   driver's  
r

esponsibility
 
to
 
constantly
 
check
 
the
 
traffic,
 
to   asses   the   distances   and   relative   speeds   of  
o

ther
 
vehicles
 
and
 
to
 
predict
 
their
 
movements   before   deciding   whether   to   change   lane.
The
 
blind
 
spot
 
sensor
 
system
 
can
 
never
 
replace   the   vigilance   and   responsibility   of   the  
d

river. Activation
  of   the   function   is   done   in   the   touch  
s

creen
 t
ablet.
F
I
n the Driving assistance
 
menu,  
p

ress   this   button;   its   indicator  
l

amp   comes   on.
The   function   is   activated.
This   indicator   lamp   comes   on   in   the  in
strument pan el.
4
Driving

174
The alert is given by a warning lamp which comes   on   in   the   door   mirror   on   the   side   in  
q

uestion   as   soon   as   a   vehicle   -   car,   lorry,  
b

icycle   -   is   detected   and   the   following  
c

onditions   are   fulfilled:
-
 
a
ll   the   vehicles   must   be   moving   in   the  
s

ame   direction   and   in   adjacent   lanes,
-
 
t
he   speed   of   your   vehicle   is   between   7   and  
87

  mph   (12   and   140   km/h),
-
 
y
ou   overtake   a   vehicle   with   a   speed  
d

ifference   of   less   than   6   mph   (10   km/h),
-
 
a
  vehicle   overtakes   you   with   a   speed  
d

ifference   of   less   than   15   mph   (25   km/h),
-
 
t
he   traffic   must   be   flowing   normally,
-
 
i
n   the   case   of   an   overtaking   manoeuvre,  
i

f   this   is   prolonged   and   the   vehicle   being  
ov

ertaken   remains   in   the   blind   spot,
-
 
y
ou   are   driving   on   a   straight   or   slightly  
c

urved   road,
-
 
y
our   vehicle   is   not   pulling   a   trailer,   a  
c

aravan... No
  alert   will   be   given   in   the   following   situations:
-
 
i
n   the   presence   of   non-moving   objects  
(

parked   vehicles,   barriers,   street   lamps,  
r

oad
 s
igns...),
-
 
w
ith   vehicles   moving   in   the   opposite  
d

irection,
-
 
d
riving   on   a   sinuous   road   or   a   sharp  
c

o r n e r,-
 
w
hen   overtaking   (or   being   overtaken   by)   a  
v

ery   long   vehicle   (lorry,   coach...)   which   is  
a

t   the   same   time   detected   at   the   rear   in   the  
b

lind   spot   angle   and   present   in   the   driver's  
f

or ward   field   of   vision,
-
 
i
n   very   heavy   traffic:   vehicles   detected   in  
f

ront   and   behind   are   confused   with   a   lorry  
o

r   a   stationary   object,
-
 
w
hen   overtaking   quickly.
driving