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The alert is maintained until the system
is reinitialised.
The loss of pressure detected does not
always c
ause v
isible b
ulging o
f t
he t
yre. Do n
ot
s
atisfy
y
ourself
w
ith
j
ust
a v
isual
che
ck. Before
r
einitialising
t
he
s
ystem,
e
nsure
th
at the pressures of the four tyres are
correct for the use of the vehicle, as
given
o
n
t
he
t
yre
p
ressure
l
abel.
The under-inflation detection system
does
n
ot
g
ive
a w
arning
i
f
a p
ressure
i
s
in
correct
a
t
t
he
t
ime
o
f
r
einitialisation.
Under-inflation alert
This is given by fixed illumination of th
is w arning l amp, a ccompanied b y an a
udible
s
ignal
a
nd
t
he
d
isplay
o
f
a me
ssage.
F
Red
uce speed immediately, avoid
excessive
s
teering
m
ovements
a
nd
s
udden
br
aking
F
St
op
t
he
v
ehicle
a
s
s
oon
a
s
i
t
i
s
s
afe
t
o
d
o
s
o.F If y
ou h ave a c ompressor ( such a s t he o ne in t
he
t
emporary
p
uncture
r
epair
k
it),
c
heck
th
e
p
ressures
o
f
t
he
f
our
t
yres
w
hen
c
old.
If i
t
i
s
n
ot
p
ossible
t
o
c
arry
o
ut
t
his
c
heck
st
raight
a
way,
d
rive
c
arefully
a
t
r
educed
spe
ed.
or
F
In t
he event of a puncture, use the
temporary
p
uncture
r
epair
k
it
o
r
t
he
s
pare
wh
eel
(
depending
o
n
e
quipment).
Reinitialisation
It is necessary to reinitialise the system every
time one o r m ore t yre p ressure i s a djusted, a nd af
ter
c
hanging
o
ne
o
r
m
ore
w
heels.
Safety
Page 154 of 444

DS3_en_Chap06_securite_ed02-2015
Reinitialisation of the system is done in the vehicle configuration menu, with the vehicle stationary and the ignition on.
Monochrome screen A
F Press the MEnU b utton for access to the
main m enu.
F
Pr
ess the " 5" or " 6" button to select
the Veh conf ig menu, then confirm by
pressing
t
he
O
K
b
utton.
F
Pr
ess the " 5" or " 6" button to select the
" Reinit inflat ", menu, then confirm by
pressing
t
he
O
K
b
utton.
A m
essage
i
s
d
isplayed
t
o
c
onfirm
t
he
ins
truction.
F
Co
nfirm
b
y
p
ressing
t
he
O
K
b
utton.
Monochrome screen C
F Press the MEnU button for access to the
main m enu.
F
Pr
ess the " 5" or " 6" button to select the
" Personalisation-configuration " menu,
then
c
onfirm
b
y
p
ressing
t
he
O
K
b
utton.
F
Pr
ess the " 5" or " 6" button to select the
" Define vehicle parameters " menu, then
confirm
b
y
p
ressing
t
he
OK b
utton.F Pr
ess the "
5" or " 6" button to select
the " Tyre pressures " menu, then the
" Reinitialisation "
m
enu,
t
hen
c
onfirming
by p
ressing
t
he
O
K
b
utton.
A m
essage
c
onfirms
t
he
r
einitialisation.
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153
DS3_en_Chap06_securite_ed02-2015
Touch screen tablet
F Press the MEnU button.
F Selec t the "Driving " m
enu.
F
In t
he
s
econdary
p
age,
s
elect
"U
nder-
inflation initialisation ".
A
m
essage
i
s
d
isplayed
t
o
c
onfirm
t
he
re
initialisation
in
struction.
F
Selec
t "Ye s " or "
no"
,
t
hen
c
onfirm.
A
m
essage
c
onfirms
t
he
r
einitialisation. The
n
ew
p
ressure
s
ettings
r
egistered
a
re
co
nsidered to be reference values by the
system.Snow chains
The system does not have to be
reinitialised a fter f itting o r r emoving sno
w
cha
ins. Before
d
oing
a
nything
t
o
t
he
s
ystem,
th
e pressures of the four tyres must be
checked a nd t he s ystem r einitialised.
The under-inflation alert is only
dependable if the system has been
reinitialised with all four tyres inflated to
the
c
orrect
p
ressures.
Operating fault
The flashing and then fixed illumination of the un
der-inflation war ning lamp ac companied by i
llumination
o
f
t
he
S
ervice
w
arning
l
amp
in
dicates
a f
ault
w
ith
t
he
s
ystem.
In
t
his
c
ase,
u
nder-inflation
m
onitoring
o
f
t
he
ty
res
i
s
n
o
l
onger
a
ssured.
Have
t
he
s
ystem
c
hecked
b
y
a C
ITROËN
de
aler
o
r
a q
ualified
w
orkshop.
Safety
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DS3_en_Chap06_securite_ed02-2015
Braking assistance systems
Group of supplementary systems which help you t o o btain o ptimum b raking i n c omplete sa
fety
i
n
e
mergency
s
ituations:
-
an
ti-lock
b
raking
s
ystem
(
ABS),
-
el
ectronic
b
rake
f
orce
d
istribution
(
EBFD),
-
em
ergency
b
raking
a
ssistance
(
EBA).Anti-lock braking system
and electronic brake force
distribution
Linked systems which improve the stability and manoeuvrability o f y our v ehicle w hen b raking, in p
articular
o
n
p
oor
o
r
s
lippery
s
ur faces.
Activation
The anti-lock braking system comes into operation a utomatically w hen t here i s a r isk o f wh
eel
l
ock.
Normal
o
peration
o
f
t
he
A
BS
m
ay
m
ake
i
tself
fe
lt
b
y
s
light
v
ibration
o
f
t
he
b
rake
p
edal.
When
b
raking
i
n
a
n
e
mergency,
p
ress
ve
ry
f
irmly
w
ithout
r
eleasing
t
he
pre
ssure.
Operating fault
If this warning lamp comes on, together w ith t he S TOP and ABS
warning
l
amps,
a
ccompanied
b
y
a
n
au
dible
s
ignal
a
nd
a m
essage
i
n
t
he
s
creen,
i
t
in
dicates
a m
alfunction
o
f
t
he
e
lectronic
b
rake
fo
rce distribution which could result in loss of
control
o
f
t
he
v
ehicle
w
hen
b
raking.
You must stop as soon as it is safe to do so.
When
r
eplacing
w
heels
(
tyres
a
nd
ri
ms),
e
nsure
t
hat
t
hey
c
onform
t
o
t
he
man
ufacturer's
re
commendations.
If
t
his
w
arning
l
amp
c
omes
o
n,
ac
companied
b
y
a
n
a
udible
s
ignal
an
d
a m
essage
i
n
t
he
s
creen,
i
t
in
dicates
a m
alfunction
o
f
t
he
a
nti-lock
b
raking
sy
stem which could result in loss of control of
the
v
ehicle
w
hen
b
raking.
In either case, contact a CITROËN dealer or a
qualified
wo
rkshop.
Page 157 of 444

155
DS3_en_Chap06_securite_ed02-2015
Emergency braking assistance
System which, in an emergency, enables you to obtain t he o ptimum b raking p ressure m ore qu
ickly,
t
hus
r
educing
t
he
s
topping
d
istance.
Activation
It is triggered by the speed at which the brake pedal i s p ressed.
The effect of this is a reduction in the
resistance of the pedal and an increase in
braking
ef
ficiency.
When
b
raking
i
n
a
n
e
mergency,
p
ress
fi
rmly
w
ithout
r
eleasing
t
he
p
ressure.
Trajectory control systems
Anti-slip regulation (ASR)
and dynamic stability
control (DSC)
The anti-slip regulation (also known as traction control) o ptimises t raction t o p revent s kidding of t
he
w
heels,
b
y
a
cting
o
n
t
he
b
rakes
o
f
t
he
dr
iving
w
heels
a
nd
o
n
t
he
e
ngine.
The electronic stability control acts on the
brake
o
f
o
ne
o
r
m
ore
w
heels
a
nd
o
n
t
he
e
ngine
to k
eep
t
he
v
ehicle
o
n
t
he
t
rajectory
r
equired
by t
he driver, within the limits of the laws of
physics.Activation
These systems are activated automatically
each t ime t he v ehicle i s s tarted.
They
c
ome
i
nto
o
peration
i
n
t
he
e
vent
o
f
a g
rip
or tr
ajectory
proble
m.
This
i
s
i
ndicated
b
y
f
lashing
o
f
t
his
wa
rning
l
amp
i
n
t
he
i
nstrument
p
anel.
Safety
Page 158 of 444

DS3_en_Chap06_securite_ed02-2015
Deactivation
In extremely severe conditions (deep snow,
mud...), when it is not possible to move off, it
may be useful to temporarily deactivate the
systems, so that the wheels can spin freely and
regain grip.
F
P
ress this button, located on the left below
the steering wheel.
Illumination of the lamp in the button indicates
that the systems are deactivated.
Reactivation
These systems are reactivated automatically
each time the ignition is switched back on
or from 30 mph (50 km/h) except 1.6 litre
(THP
1
65, THP 155 and THP 150) and
PERFORMANCE petrol engines.
F
P
ress this button again to reactivate them
manually.
Operating fault
The DSC/ASR systems offer
exceptional safety in normal driving, but
this should not encourage the driver to
take extra risks or drive at high speed.
The correct functioning of these
systems depends on observation of the
manufacturer's recommendations on:
-
w
heels (tyres and rims),
-
b
raking components,
-
el
ectronic components,
-
a
ssembly and repair procedures.
After an impact, have these systems
checked by a CITROËN dealer or a
qualified workshop. Illumination of this warning lamp in the
instrument panel and the lamp in the
button, accompanied by an audible
signal and a message, this indicates a
malfunction of these systems.
Have it checked by a CITROËN dealer or a
qualified workshop.
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157
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Active City Brake
Active City Brake is a driving assistance system that aims to avoid a frontal collision
or reduce the speed of an impact if the driver
does
n
ot
r
eact
s
ufficiently
(
inadequate
b
rake
appl
ication).This
s
ystem
i
s
d
esigned
t
o
i
mprove
dr
iving
s
afety.
It
r
emains
t
he
d
river's
r
esponsibility
t
o
co
ntinuously monitor the state of the
traffic and to assess the distances and
relative
s
peeds
o
f
o
ther
v
ehicles.
Active
C
ity
B
rake
c
an
i
n
n
o
ci
rcumstances replace the need for
vigilance
o
n
t
he
p
art
o
f
t
he
d
river.
Never
l
ook
a
t
t
he
l
aser
s
ensor
t
hrough
an op
tical
ins
trument
(m
agnifying
gla
ss,
mi
croscope...)
a
t
a d
istance
o
f
l
ess
t
han
10 c
entimetres:
r
isk
o
f
e
ye
i
njury.Automatic
b
raking
o
ccurs
l
ater
t
han
i
f
do
ne by the driver, so as to intervene
only
w
hen
t
here
i
s
a h
igh
r
isk
o
f
col
lision.Principle
Using a laser sensor located at the top of the windscreen, this system detects a vehicle
running
i
n
t
he
s
ame
d
irection
o
r
s
tationary
ah
ead
o
f
y
our
v
ehicle.
When
n
ecessary,
t
he
v
ehicle's
b
raking
s
ystem
is o
perated automatically to avoid a collision
with
t
he
v
ehicle
a
head.
Conditions for activation
Active City Brake only operates if the following conditions a re m et:
●
ig
nition
o
n,
●
th
e
v
ehicle
i
s
i
n
a f
or ward
g
ear,
●
sp
eed
i
s
b
etween
a
bout
3 a
nd
1
8
m
ph
(
5
a
nd
3
0
k
m/h),
●
th
e
b
raking
a
ssistance
s
ystems
(
ABS,
EB
FD,
e
mergency
b
raking
a
ssistance)
a
re
no
t faulty,
●
th
e
t
rajectory
c
ontrol
s
ystems
(
ASR,
D
SC)
ar
e not deactivated or faulty,
●
th
e
v
ehicle
i
s
n
ot
i
n
a t
ight
c
orner,
●
th
e
s
ystem
h
as
n
ot
b
een
t
riggered
d
uring
th
e
p
revious
1
0
s
econds.
Safety
Page 160 of 444

DS3_en_Chap06_securite_ed02-2015
Operation
When your vehicle is too close to or
approaches the v ehicle a head t oo q uickly t he sy
stem
a
utomatically
a
pplies
t
he
b
rakes
t
o
av
oid
a c
ollision.
The collision can be avoided automatically if the
difference in speed between your vehicle and the
vehicle
a
head
d
oes
n
ot
e
xceed
9 m
ph
(
15
k
m/h).
Above this threshold, the system will do what
is possible to avoid or reduce the accident by
lowering
t
he
s
peed
o
f
i
mpact.
The
a
utomatic
b
raking
m
ay
b
ring
t
he
v
ehicle
t
o
a c
omplete
s
top
i
f
t
he
s
ituation
r
equires
i
t.
In this case, the vehicle is held stationary
temporarily
(
for
a
bout
1
.5
s
econds)
t
o
a
llow
th
e
d
river
t
o
t
ake
b
ack
c
ontrol
b
y
p
ressing
t
he
bra
ke
peda
l.
You are then alerted by the display of a
message.
The
b
rake
l
amps
o
n
y
our
v
ehicle
c
ome
o
n
t
o
wa
rn
o
ther
r
oad
u
sers.
After an impact, the system is
automatically
p
ut
o
ut
o
f
s
ervice:
i
t
n
o
longe
r
opera
tes.
You
m
ust
g
o
t
o
a C
ITROËN
d
ealer
o
r
a qu
alified
w
orkshop
t
o
h
ave
t
he
s
ystem
ma
de
o
perational
a
gain.
During
a
utomatic
b
raking,
t
he
d
river
ca
n
a
lways
o
btain
a h
igher
r
ate
o
f
de
celeration than that controlled by the
system,
b
y
p
ressing
f
irmly
o
n
t
he
b
rake
peda
l.
The t
riggering o f t he s ystem m ay c ause th
e
e
ngine
t
o
s
tall,
u
nless
t
he
d
river
de
presses
t
he
c
lutch
p
edal
q
uickly
en
ough
d
uring
a
utomatic
b
raking.
Deactivation
The system is deactivated in the vehicle
configuration menu, a ccessible w ith t he i gnition o n.
Its
s
tate
i
s
m
emorised
w
hen
t
he
i
gnition
i
s
sw
itched off.
When the system is deactivated, a
message i s d isplayed e very t ime t he ig
nition
i
s
s
witched
o
n,
t
o
w
arn
y
ou.