ECU CITROEN C1 2018 User Guide

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Operation
Three levels of operation are possible:
●  P re-collision alert :
  if   a   risk   of   collision w

ith   a   vehicle   is   detected,   a   warning   lamp
 c

omes   on   in   the   instrument   panel   together
 w

ith   an   audible   signal   to   encourage   the
 d

river   to   make   an   avoiding   manoeuvre.   The
 t

hresholds   for   triggering   the   alert   can   be   set.
●
 
Br
aking assistance :
  increases   the  
b

raking   started   by   the   driver,   only   if   a   risk  
o

f   collision   is   detected.
●
 
A
utomatic pre-collision braking:
  when  
y

our   vehicle   is   too   close   to   or   closing  
t

oo   quickly   on   the   vehicle   ahead   of   you,  
t

he   system   automatically   operates   the  
b

rakes   to   reduce   the   speed   of   impact.   A  
c

ollision   can   be   avoided   automatically   if   the  
d

ifference   in   speed   between   your   vehicle  
a

nd  
t
he  
o
ne  
a
head  
i
s  
n
ot  
m
ore  
t
han  
1
8  
m
ph  
(

30   km/h).You
  are   then   alerted   by   the   display   of  
t

his   warning   lamp,   accompanied   by  
a

n   audible   signal. The
  automatic   braking   may   bring   the   vehicle   to  a
  complete   stop   if   the   situation   requires   it.
The
  brake   lamps   on   your   vehicle   come   on   to  
w

arn   other   road   users. The
  triggering   of   the   system   may   cause  
t

he   engine   to   stall,   unless   the   driver  
d

epresses   the   clutch   pedal   quickly  
e

nough   during   automatic   braking.
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Setting the alert thresholds
Press this button repeatedly to cycle through   the   thresholds.
The
  default   setting   is   "Normal".
The
 
alert
 
thresholds   determine   how   you   want   to   be   warned   of   the   imminent   risk   of   collision   with   the  
v

ehicle
 
ahead   of   you.
You
 
can
 
choose   one   of   three   thresholds:
A.
 "

Far",
  to   be   given   early   warning   (cautious   driving).
B.
 "

Normal".
C.
 "

Close",   for   a   later   warning   (sporty   driving).
Deactivation / Reactivation
Press this button for more than 3 seconds.
P ress   the   button   again   to   reactivate   the   system.
The
  system   is   automatically   reactivated   every  
t

ime   the   engine   is   started   with   the   key   or   the  
"

START/STOP"   button.
This
  indicator   lamp   comes   on   in   the  
in

strument
 pan
el.
This
  indicator   lamp   comes   on   in   the  
i

nstrument   panel   and   the   message  
"

PCS   OFF"   is   displayed.
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Never leave accumulations of snow or any   object   projecting   above   the   bonnet  
o

r   in   front   of   the   roof:   this   might   fall   into  
t

he   field   of   vision   of   the   sensor   and  
g

enerate   a   detection.
Operating limits
The system  o nly  d etects  v ehicles  (cars,  lorries) t
hat   are   stationary   or   moving   in   the   same  
d

irection   as   your   vehicle. In
  difficult   weather   conditions   (very  
h

eavy   rain,   snow,   fog,   hail...),   braking  
d

istances   increase,   which   can   reduce  
t

he   ability   of   the   system   to   avoid   a  
c

ollision.
The
  driver   must   therefore   remain  
par

ticularly
 v
igilant.
The
  system   is   not   triggered   or   is   interrupted   if  
t

he
 d
river:
-
 
a
ccelerates   strongly   (even   if   the   speed  
l

imiter   is   on),
-
 
o
r   turns   the   steering   wheel   suddenly  
(

avoiding
 m
anoeuvre).
Detection
  capability   is   less   effective   if:
-
 
y
ou   are   driving   on   roads   with   pronounced  
b

ends   and/or   on   roads   in   poor   condition,
-
 
y
our   vehicle   is   excessively   loaded,   as  
t

his   changes   the   horizontal   attitude   of   the  
v

ehicle.
-
 
y
our   vehicle   skids.
It
  does   not   detect   small   vehicles  
(

bicycles,   motorcycles),   pedestrians   or  
a

nimals,   nor   non-reflective   stationary  
ob

jects.Unwanted triggering of the system
It is possible for the system to detect a risk of imminent   collision   and   start   working,   in   the  
fo

llowing
 c
onditions
 in par
ticular:
-
 
d
etection   of   an   object   located   close   to   the  
e

dge   of   the   road   entering   a   corner   (safety  
b

arrier,   lamp   post   or   road   sign),
-
 
d
etection   of   a   structure   located   at   the   top  
o

r   bottom   of   a   steep   slope   (advertising  
h

oarding,   steet   lighting),
-
 
d
etection   of   reflective   objects   (central  
r

eservation...)   in   the   road,
-
 
d
etection   of   the   upper   bar   of   a   bridge   or   a  
t

raffic   light   gantry,
-
 
p
assing   a   vehicle   travelling   in   the   other  
d

irection   in   a   corner,
-
 
p
assing   a   vehicle   traveling   in   the   other  
d

irection,   at   a   crossroads,   when   your  
v

ehicle   is   turning   left   or   right,
-
 
i
f   the   vehicle   ahead   of   you   sends   up   water  
o

r snow,
-
 
i
f   your   vehicle   stops   very   close   to   an  
ov

erhanging   wall   or   other   vehicles,
-
 
w
hen   your   vehicle   closes   rapidly   on   the  
v

ehicle
 a
head,
-
 
i
f   the   vehicle   is   raised   or   lowered,
-
 
i
f   the   vehicle   passes   through   a   plastic  
c

urtain,
-
 
i
f   driving   through   mist   or   smoke,
-
 
i
f   the   sensor   is   misaligned   (following  
r

eplacement   after   a   collision).
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Operating faults
Sensor fault
The operation of the laser sensor may suffer inter ference   from   accumulations   of   dirt   or  
m

isting   of   the   windscreen   or   the   presence   of  
a

n   object   causing   an   obstruction   (e.g.:   bonnet  
ope

n). In
  this   case   you   are   warned   by   the  
d

isplay   of   this   flashing   warning   lamp  
i

n   the   instrument   panel.
Use
  the   windscreen   demisting   and   regularly  
c

lean   the   area   of   the   windscreen   in   front   of   the  
sen

sor.Do
  not   stick   or   other wise   fix   any   object  
o

n   the   windscreen   in   front   of   the   sensor.
System fault
In the event of a malfunction of the   system,   you   are   warned   by   the  
d

isplay   of   this   flashing   warning   lamp  
i

n   the   instrument   panel.
Have
 
the
 
system   checked   by   a   CITROËN  
d

ealer
 
or
 
a   qualified   workshop.
In
 
the   event   of   an   impact   to   the  
w

indscreen   at   the   sensor,   deactivate  
t

he
  system   and   contact   a   CITROËN  
d

ealer   or   a   qualified   workshop to   have  
y

our   windscreen   replaced.
Never
  try   to   remove,   adjust   or   test   the  
sen

sor.
Only
  a   CITROËN   dealer   or   a   qualified  
w

orkshop   is   able   to   work   on   the   system.
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Seat belts
Front seat belts
Fastening
F Pull  the   strap,   then   insert   the   tongue   in   the  buc
kle.
F
 
C
heck   that   the   seat   belt   is   fastened  
c

orrectly   by   pulling   the   strap.
The
 
front
 
seat
 
belts
 
are
 
fitted
 
with
 
a
 p
retensioning
 
and
 
force
 
limiting
 
system.
This
 
system
 
improves
 
safety
 
in
 
the
 
front
 
s

eats
 
in
 
the
 
event
 
of
 
a
 
front
 
or
 
side
 
impact.
 
D

epending
 
on
 
the
 
severity
 
of
 
the
 
impact,
 
the
 
p

retensioning
 
system
 
instantly
 
tightens
 
the
 
seat
 
b

elts
 
against
 
the
 
body
 
of
 
the
 
occupants.
The
 
pretensioning
 
seat
 
belts
 
are
 
active
 
when
 
t

he
 
ignition
 
is
 
on.
The
 
force
 
limiter
 
reduces
 
the
 
pressure
 
of
 
the
 
s

eat belt on the chest of the occupant, so
improving
 
their
 
protection.
Rear seat belts
The rear seats are each fitted with a three-point s eat   belt.
Unfastening
F Press   the   red   button   on   the   buckle.
F  G uide   the   seat   belt   as   it   reels   in.
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Seat belt not fastened /
unfastened warning lamps
1. Front  seat   belts   not   fastened   /   unfastened  w
arning   lamp,   in   the   instrument   panel.
2.
 L

eft  
h
and  
r
ear  
s
eat  
b
elt  
u
nfastened  
w
arning  
l

amp,   in   the   seat   belts   and   passenger's  
f

ront   airbag   display   screen.
3.
 R

ight   hand   rear   seat   belt   unfastened  
w

arning   lamp,   in   the   seat   belts   and  
p

assenger's   front   airbag   display   screen.Rear seat belt warning lamp(s)
The warning lamp(s) 2 and/or 3 come on in the seat   belts   and   passenger's   front   airbag   warning  
l

amp   display   screen   when   one   or   more   rear  
p

assengers
 u
nfasten
 t
heir
 sea
t
 b
elt.
From
  about   12   mph   (20   km/h)   and   for   about  
30
  seconds,   illumination   of   the   warning   lamp   is  
a

ccompanied   by   an   audible   signal.
Beyond
  this   time,   if   the   seat   belt   is   still   not  
f

astened,   the   tone   of   the   audible   signal  
c

hanges   and   remains   active   for   about   a   further  
9

0   seconds.
If
 
you
 
place
 
a
 
load
 
on
 
the
 
front
 
p

assenger
 
seat,
 
this
 
may
 
cause
 
the
 
w

arning
 
lamp
 
to
 
come
 
on.
Front seat belt(s) warning lamp
The warning lamp 1 comes on in the instrument p anel   if   the   front   seat   belt   is   not   fastened   or   is  
u

nfastened.
From
  about   12   mph   (20   km/h)   and   for   about  
30
  seconds,   illumination   of   the   warning   lamp   is  
a

ccompanied   by   an   audible   signal.
Beyond
  this   time,   if   the   seat   belt   is   still   not  
f

astened,   the   tone   of   the   audible   signal  
c

hanges   and   remains   active   for   about   a   further  
9

0   seconds.
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The driver must ensure that passengers use the   seat   belts   correctly   and   that   they   are   all  
f

astened   before   setting   off.
Wherever
  you   are   seated   in   the   vehicle,  
a

lways fasten your seat belt, even for short
journeys.
Do
  not   interchange   the   seat   belt   buckles   as  
t

hey   will   not   fulfil   their   role   fully.
The
  seat   belts   are   fitted   with   an   inertia   reel  
p

ermitting   automatic   adjustment   of   the  
l

ength   of   the   strap   to   your   size.   The   seat   belt  
i

s   stowed   automatically   when   not   in   use.
Before
  and   after   use,   ensure   that   the   seat  
b

elt   is   reeled   in   correctly.
The
  lower   part   of   the   strap   must   be  
p

ositioned   as   low   as   possible   on   the   pelvis.
The
  upper   part   must   be   positioned   in   the  
h

ollow   of   the   shoulder.
The
  inertia   reels   are   fitted   with   an   automatic  
l

ocking   device   which   comes   into   operation   in  
t

he   event   of   a   collision,   emergency   braking  
o

r   if   the   vehicle   rolls   over.   You   can   release  
t

he   device   by   pulling   the   strap   firmly   and  
t

hen   releasing   it   so   that   it   reels   in   slightly.Recommendations for children
Use a suitable child seat if the passenger is less   than   12   years   old   or   shorter   than   one  
a

nd   a   half   metres.
Never
  use   the   same   seat   belt   to   secure   more  
t

han   one   person.
Never
  allow   a   child   to   travel   on   your   lap.
For
  more   information   on   child   seats,   refer   to  
t

he   corresponding   section.
In
 
order
 
to
 
be
 
effective,
 
a
 
seat
 
belt
 
must:
-
 b
e
 
tightened
 
as
 
close
 
to
 
the
 
body
 
as
 p
ossible,
-
 
b

e
 
pulled
 
in
 
front
 
of
 
you
 
with
 
a
 
smooth
 
m

ovement,
 
checking
 
that
 
it
 
does
 
not
 
t

wist,
-
 
b

e
 
used
 
to
 
restrain
 
only
 
one
 
person,
-
 
n

ot
 
bear
 
any
 
trace
 
of
 
cuts
 
or
 
fraying,
-
 
n

ot
 
be
 
converted
 
or
 
modified
 
to
 
avoid
 
a

ffecting
 it

s
 p

erformance.
In the event of an impact
Depending on the nature and
seriousness of the impact , the
pretensioning
  device   may   be   deployed  
b

efore   and   independently   of   the   airbags.  
D

eployment   of   the   pretensioners   is  
a

ccompanied   by   a   slight   discharge   of  
h

armless   smoke   and   a   noise,   due   to   the  
a

ctivation   of   the   pyrotechnic   cartridge  
i

ncorporated   in   the   system.
In
  all   cases,   the   airbag   warning   lamp  
c

omes on.
Following
  an   impact,   have   the   seat   belts  
s

ystem   checked,   and   if   necessary   replaced,  
b

y   a   CITROËN   dealer   or   a   qualified  
w

orkshop.
In
 
accordance
 
with
 
current
 
safety
 
r

egulations,
 
for
 
all
 
repairs
 
on
 
your
 
vehicle's
 
s

eat
 
belts,
 
go
 
to
 
a
 
qualified
 
workshop
 
with
 t
he
 
skills
 
and
 
equipment
 
needed,
 
which
 
a
 C
ITROËN
 
dealer
 
is
 
able
 
to
 
provide.
Have
 
your
 
seat
 
belts
 
checked
 
regularly
 
by
 
a

 
CITROËN
 
dealer
 
or
 
a
 
qualified
 
workshop,
 
p

articularly
 
if
 
the
 
straps
 
show
 
signs
 
of
 
d

amage.
Clean the seat belt straps with soapy
water
 
or
 
a
 
textile
 
cleaning
 
product,
 
sold
 
by
 
C

ITROËN
 
dealers.
After
 
folding
 
or
 
moving
 
a
 
seat
 
or
 
rear
 
bench
 
s

eat,
 
ensure
 
that
 
the
 
seat
 
belt
 
is
 
positioned
 
a

nd
 
reeled
 
in
 
correctly.
Advice
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Airbags
Designed to contribute towards the safety of the   occupants   in   the   event   of   violent   collisions.  
T

he   airbags   supplement   the   action   of   the   force-
limiting
  seat   belts.
If
  a   collision   occurs,   the   electronic   detectors  
r

ecord   and   analyse   the   front   and   side   impacts  
s

ustained   in   the   impact   detection   zones:
-
 
i
n   the   case   of   a   serious   impact,   the   airbags  
a

re   deployed   instantly   and   contribute  
t

owards   better   protection   of   the   occupants  
o

f   the   vehicle;   immediately   after   the   impact,  
t

he   airbags   deflate   rapidly   so   that   they  
d

o   not   hinder   visibility   or   the   exit   of   the  
o

ccupants,
-
 
i
n   the   case   of   a   minor   or   rear   impact   or   in  
c

ertain   roll-over   conditions,   the   airbags  
m

ay   not   be   deployed;   the   seat   belt   alone  
c

ontributes   towards   providing   your  
p

rotection   in   these   situations.
The airbags do not operate when the
ignition is switched off. The
  deployment   of   an   airbag   is  
a

ccompanied   by   a   slight   emission  
o

f   smoke   and   a   noise,   due   to   the  
d

etonation   of   the   pyrotechnic   charge  
i

ncorporated   in   the   system.
This
  smoke   is   not   harmful,   but   sensitive  
i

ndividuals   may   experience   slight  
ir

ritation.
The
  detonation   noise   associated   with  
t

he   deployment   of   an   airbag   may   result  
i

n   a   slight   loss   of   hearing   for   a   short  
t

ime.
This
  equipment   will   only   deploy   once.  
I

f   a   second   impact   occurs   (during   the  
s

ame   or   a   subsequent   accident),   the  
a

irbag   will   not   be   deployed   again.
Impact detection zones
A. Front  impact   zone.
B. S ide   impact   zone.
Front airbags
Deployment
The airbags are deployed, except the passenger's   front   airbag   if   it   is   deactivated,   in   the e

vent   of   a   serious   front   impact   to   all   or   part   of   the
 f

ront   impact   zone   A,
  in   the   longitudinal   centreline
 o

f   the   vehicle   on   a   horizontal   plane   and   directed
 f

rom   the   front   to   the   rear   of   the   vehicle.
The
  front   airbag   inflates   between   the   thorax   and
 h

ead   of   the   front   occupant   of   the   vehicle   and   the
 s

teering   wheel,   driver's   side,   and   the   dashboard,
 p

assenger's   side   to   cushion   their   for ward
 m

ovement.
System
  which   protects   the   driver   and   front  
p

assenger   in   the   event   of   a   serious   front   impact  
i

n   order   to   limit   the   risk   of   injury   to   the   head   and  
t

horax.
The   driver's   airbag   is   fitted   in   the   centre   of   the  
s

teering   wheel;   the   front   passenger's   airbag   is  
f

itted   in   the   dashboard   above   the   glove   box.
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Deactivating the passenger's
front airbag
Only the passenger's front airbag can be deactivated.
F

W
ith the ignition off ,
  insert   the   key   in   the  
p

assenger   airbag   deactivation   switch.
F

T
urn it to the "OFF"
 p
osition.
F
 
R
emove   the   key   keeping   the   switch   in   the  
n

ew   position.When
  the   ignition   is   on,   this   warning  
l

amp   comes   in   the   seat   belt   and  
p

assenger's   front   airbag   display  
s

creen.   It   stays   on   while   the   airbag   is  
d

eactivated. To
  assure   the   safety   of   your   child,  
t

he   passenger's   front   airbag   must   be  
d

eactivated   when   you   install   a   rear ward  
f

acing   child   seat   on   the   front   passenger  
sea

t.
Other wise,   the   child   would   risk   being  
s

eriously   injured   or   killed   if   the   airbag  
w

ere   deployed.
Reactivating the passenger's
front airbag
When you remove a rear ward facing child seat, w
ith the ignition off , turn the switch to the
"ON"
 

position   to   reactivate   the   airbag   and   so  
a

ssure   the   safety   of   your   front   passenger   in   the  
e

vent   of   an   impact.
When
  the   ignition   is   switched   on,   this  
w

arning   lamp   comes   on   in   the   seat  
b

elt   and   passenger's   front   airbag  
d

isplay   screen.   It   stays   on   while   the  
f

ront   airbag   is   activated.
Operating fault
Illumination of this warning lamp in the   instrument   panel   indicates   a   fault  
w

ith   the   airbags.
Contact
 
a
  CITROËN   dealer   or   a   qualified  
w

orkshop
  without   delay   to   have   the   system  
c

hecked.
 
The   airbags   may   no   longer   be  
d

eployed
 
in   the   event   of   a   serious   impact.
In
 
this
 
case,   do   not   install   a   child   seat   or   seat  
a

n
 
adult
 
on   the   front   passenger   seat.
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Lateral airbags
Deployment
They are deployed unilaterally in the event of   a   serious   side   impact   applied   to   all   or   part  
o

f   the   side   impact   zone   B,
  perpendicular   to  
t

he   longitudinal   centreline   of   the   vehicle   on   a  
h

orizontal   plane   and   directed   from   the   outside  
t

owards   the   inside   of   the   vehicle.
The
  lateral   airbag   inflates   between   the   hip   and  
s

houlder   of   the   front   occupant   of   the   vehicle  
a

nd   the   corresponding   door   trim   panel.
System
  which   protects   the   driver   and   front  
p

assenger   in   the   event   of   a   serious   side   impact  
i

n   order   to   limit   the   risk   of   injury   to   the   chest,  
b

etween   the   hip   and   the   shoulder.
Each   lateral   airbag   is   fitted   in   the   seat   backrest  
f

rame,   door   side.
Impact detection zones
A. Front
  impact   zone.
B. S ide   impact   zone.
The
  lateral   airbags   may   also   be  
d

eployed   during   certain   front   impacts.
Safety