2021 CITROEN C1 ECU

109
C1_en_Chap06_securite_ed01-2016
The TRC and DSC systems offer increased   safety   in   normal   driving,   but  
s

hould   not   encourage   the   driver   to   take  
e

xtra   risks   or   drive   at   high   speed.
The correct operation of these
systems
  depends   on   observation   of  
t

he
 ma
nufacturer's
 r
ecommendations
 r

egarding   the   wheels   (tyres   and   rims),  
t

he   braking   components,   the   electronic  
c

omponents   and   the   assembly   and  
r

epair   procedures   used   by   CITROËN  
d

ealers.
After
  an   impact,   have   the   system  
c

hecked   by   a   CITROËN   dealer   or   a  
q

ualified
 w
orkshop.
Deactivation
In exceptional conditions (starting a vehicle which   is   bogged   down,   stuck   in   snow,   on   soft  
g

round...),   it   may   be   advisable   to   deactivate   the  
D

SC   and   TRC   systems,   so   that   the   wheels   can  
s

pin   freely   and   regain   grip.
Operating fault
However, it is recommended that these systems   be   reactivated   as   soon   as   possible.
F
 
P
ress   this   button   briefly.
This
  warning   lamp   comes   on:   the  
T

RC   system   no   longer   acts   on   the  
o

peration   of   the   engine.
Reactivation
The TRC and DSC control systems are reactivated   automatically   every   time   the   engine  
i

s   started. F
 
P
ress   the   button   again   to  
r

eactivate   it   manually. Illumination
  of   this   warning   lamp,  a
ccompanied   by   an   audible   signal,  
i

ndicates   a   fault   with   the   system.
Drive
  carefully   at   reduced   speed   and   contact  
a

  CITROËN   dealer   or   a   qualified   workshop   to  
h

ave   the   system   checked.
Deactivation of the TRC system only
Deactivation of the TRC and DSC systems F

V

ehicle stationary , press this
button
 
for
 
at
 
least
 
than
 
3
 
seconds.
These
 
warning
 
lamps
 
come
 
o

n:
 
the
 
TRC
 
and
 
DSC
 
s

ystems
 
no
 
longer
 
act
 
on
 
t

he
 
operation
 
of
 
the
 
engine. When
  the   TRC   system   only   is   deactivated,   it   is  
r

eactivated   as   the   vehicle's   speed   increases.
When
  both   the   TRC   and   DSC   systems   are  
d

eactivated,   they   do   not   reactivate   themselves  
e

ven   if   the   speed   of   the   vehicle   increases.
6
Safety

110
C1_en_Chap06_securite_ed01-2016
Active City Brake
Active City B rake  i s  a  d riving  a ssistance  s ystem  t
hat   aims   to   avoid   a   frontal   collision   or   reduce  
t

he   speed   of   an   impact   if   the   driver   does   not  
r

eact   or   reacts   too   late   (brake   application   too  
l

ate). This
  system   is   designed   to   improve  
d

riving   safety.
It
  remains   the   driver's   responsibility   to  
c

ontinuously   monitor   the   state   of   the  
t

raffic   and   to   assess   the   distances   and  
r

elative   speeds   of   other   vehicles.
Active
  City   Brake   can   in   no  
c

ircumstances   replace   the   need   for  
v

igilance   on   the   part   of   the   driver.
Never
  look   at   the   laser   sensor   through  
a

n   optical   instrument   (magnifying   glass,  
m

icroscope...)   at   a   distance   of   less   than  
1

0   centimetres:   risk   of   eye   injury.Automatic
  braking   occurs   later   than   if  
d

one   by   the   driver,   so   as   to   intervene  
o

nly   when   there   is   a   high   risk   of  
c

ollision.Principle
Using a laser sensor and a camera located at the   top   of   the   windscreen,   this   system   detects  
a

  vehicle   running   in   the   same   direction   or  
s

tationary   ahead   of   your   vehicle.
When
  necessary,   the   vehicle's   braking   system  
i

s   operated   automatically   to   reduce   the   speed  
o

f   impact   or   to   help   avoid   a   collision   with   the  
v

ehicle
 a
head.
Conditions for activation
Active City Brake only operates if the following
c onditions   are   met:
●
 
t
he   engine   is   running,
●
 
t
he   vehicle   is   in   a   for ward   gear,
●
 
t
o   trigger the pre-collision alert :
-
 
t
he   speed   is   between   9   and   87   mph  
(

15 and   140   km/h),
-
 
t
he   difference   in   speed   between   your  
v

ehicle   and   the   one   ahead   is   more   than  
a

bout   9   mph   (15   km/h),
●
 
f
or   braking assistance :
-
 
t
he   speed   is   between   about   18   and  
5

0 mph   (30   and   80   km/h),
-
 
t
he   difference   in   speed   between   your  
v

ehicle   and   the   one   ahead   is   more   than  
a

bout   18   mph   (30   km/h),
●
 
f
or   automatic pre-collision braking:
-
 
t
he   speed   is   between   about   6   and  
5

0 mph   (10   and   80   km/h),
-
 
t
he   difference   in   speed   between   your  
v

ehicle   and   the   one   ahead   is   more   than  
a

bout   6   mph   (10   km/h),
●
 
t
he   braking   assistance   systems   (ABS,  
E

BFD,   EBA)   are   not   faulty,
●
 
t
he   trajectory   control   systems   (TRC,   DSC)  
a

re   not   deactivated   or   faulty,
●
 
t
he   vehicle   is   not   in   a   tight   corner,
●
 
t
he   system   has   not   been   triggered   during  
t

he   previous   10   seconds.
Safety

111
C1_en_Chap06_securite_ed01-2016
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.
6
Safety

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C1_en_Chap06_securite_ed01-2016
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.
Safety

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C1_en_Chap06_securite_ed01-2016
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).
6
Safety

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C1_en_Chap06_securite_ed01-2016
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.
Safety

115
C1_en_Chap06_securite_ed01-2016
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.
6
Safety

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C1_en_Chap06_securite_ed01-2016
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.
Safety