2015 Citroen C4 PICASSO four wheel drive

211
Under-inflation detection
The system monitors the pressures in the four t
yres,   once   the   vehicle   is   moving.
It
  compares   the   information   given   by   the   four  
w

heel   speed   sensors   with   reference values,
which must be reinitialised ever y time the
tyre pressures are adjusted or a wheel
changed .
The
  system   triggers   an   alert   as   soon   as   it  
d

etects   a   drop   in   the   inflation   pressure   of   one  
o

r   more   tyres. The
  under-inflation   detection   system  
d

oes   not   replace   the   need   for   vigilance  
o

n   the   part   of   the   driver.
This
  system   does   not   avoid   the   need   to  
c

heck   the   tyre   pressures   (including   the  
s

pare   wheel)   every   month   as   well   as  
b

efore   a   long   journey.
Driving
  with   under-inflated   tyres   impairs  
r

oad   holding,   extends   braking   distances  
a

nd   causes   premature   tyre   wear,  
p

articularly   under   arduous   condition  
(

high   loading,   high   speed,   long   journey).
System
  which   automatically   checks   the   pressures   of   the   tyres   while   driving.
The   inflation   pressures   defined   for  
y

our   vehicle   can   be   found   on   the   tyre  
p

ressure   label.
See
  the   "Identification   markings"  
s

ection.
Tyre
  pressures   should   be   checked  
w

hen   the   tyres   are   "cold"   (vehicle  
s

topped   for   1   hour   or   after   a   journey   of  
l

ess   than   6   miles   (10   km)   at   moderate  
s

peeds).
Other wise
  (when   hot),   add   0.3   bar   to  
t

he   pressures   shown   on   the   label.
Driving
  with   under-inflated   tyres  
i

ncreases   fuel   consumption.
6
Safety

212
Under-inflation alertReinitialisation
This is given by fixed illumination of t
his   warning   lamp,   accompanied   by  
a

n   audible   signal   and,   depending   on  
e

quipment,   the   display   of   a   message. It
  is   necessary   to   reinitialise   the   system   every  t
ime   one   or   more   tyre   pressure   is   adjusted,   and  
a

fter   changing   one   or   more   wheels.
A
  label   attached   to   the   middle   pillar,   driver's  
s

ide,   gives   a   reminder   of   this.
F
 
R

educe   speed   immediately,   avoid  
e

xcessive   steering   movements   and   sudden  
b

raking.
F

S

top the vehicle as soon as it is safe
to
 
do
 
so. F
I n the event of a puncture, use the
temporary
  puncture   repair   kit   or   the   spare  
w

heel   (depending   on   equipment),
or
F
 
i
f   you   have   a   compressor,   such   as   the   one  
i

n   the   temporary   puncture   repair   kit,   check  
t

he   pressures   of   the   four   tyres   when   cold,
or
F
 
i
f   it   is   not   possible   to   make   this   check  
i

mmediately,   drive   carefully   at   reduced  
s

peed.
The
  loss   of   pressure   detected   does   not  
a

lways   cause   visible   bulging   of   the   tyre.  
D

o
 
not   satisfy   yourself   with   just   a   visual  
c

heck. The
  alert   is   maintained   until   the   system  
i

s
 r
einitialised.
Safety

216
Dynamic stability control (DSC)
and anti-slip regulation (ASR)Activation
These systems are activated automatically each   time   the   vehicle   is   started.
As
  soon   as   they   detect   a   problem   of   grip   or  
t

rajectory,   these   systems   act   on   the   operation   if  
t

he   engine   and   brakes.
Deactivation
In exceptional conditions (starting a vehicle which   is   bogged   down,   stuck   in   snow,   on   soft  
g

round...),   it   may   be   advisable   to   deactivate  
t

he   DSC   and   ASR,   so   that   the   wheels   can   turn  
f

reely   and   regain   grip.
This
 
is
 
indicated
 
by
 
flashing
 
of
 
this
 
w

arning
 
lamp
 
in
 
the
 
instrument
 
panel. Reactivate
  the   systems   as   soon   as   the   level   of  
g

rip   permits. F
 
P
ress   this   button.
This
  indicator   lamp   and   the   indicator  
l

amp   in   the   button   come   on.
The
  DSC   and   ASR   systems   no   longer   act  
o

n   the   operation   of   the   engine   and   on   the  
b

rakes   in   the   event   of   a   involuntary   change   of  
t

rajectory.
DSC/ASR
The DSC and ASR systems offer increased s afety   in   normal   driving,   but   they   should   not  
e

ncourage   the   driver   to   take   extra   risks   or   drive  
a

t   high   speed.
It
  is   in   conditions   of   reduced   grip   (rain,   snow,  
i

ce)   that   the   risk   of   loss   of   grip   increases.  
I

t   is   therefore   important   for   your   safety   to  
k

eep   the   DSC   and   ASR   systems   activated  
i

n   all   conditions,   and   particularly   in   difficult  
c

onditions. The
  correct   operation   of   these   systems  
d

epends   on   observation   of   the   manufacturer's  
r

ecommendations   regarding   as   much   the  
w

heels   (tyres   and   rims),   braking   and   electronic  
c

omponents   as   the   assembly   and   repair  
p

rocedures   used   by   CITROËN   dealers.
To   benefit   in   full   from   the   effectiveness   of   the  
D

SC   and   ASR   systems   in   wintry   conditions,  
t

he   vehicle   must   be   fitted   with   four   snow  
t

yres,   allowing   the   the   vehicle   to   retain   neutral  
b

ehaviour   on   the   road.
Safety

289
Towing the vehicle
The towing eye is installed in the boot under the   floor.
To
  gain   access   to   it:
F

o
pen the boot,
F
 
l
ift   the   floor   and   remove   it,
F
 
r
emove   the   towing   eye   from   its   housing.
General recommendations
Observe the legislation in force in your country.
E nsure   that   the   weight   of   the   towing   vehicle   is   higher   than   that   of   the   towed   vehicle.
The
  driver   must   remain   at   the   wheel   of   the   towed   vehicle   and   must   have   a   valid   driving   licence.
When
  towing   a   vehicle   with   all   four   wheels   on   the   ground,   always   use   an   approved   towing  
a

rm;   rope   and   straps   are   prohibited.
The
  towing   vehicle   must   move   off   gently.
When
  towing   a   vehicle   with   the   engine   off,   there   is   no   longer   any   power   assistance   for  
b

raking   or   steering.
In
  the   following   cases,   you   must   always   call   on   a   professional   recovery   service:
-
 
v
ehicle   broken   down   on   a   motor way   or   fast   road,
-
 
f
our-wheel   drive   vehicle,
-
 
w
hen   it   is   not   possible   to   put   the   gearbox   into   neutral,   unlock   the   steering,   or   release  
t

he   parking   brake,
-
 
t
owing   with   only   two   wheels   on   the   ground,
-
 
w
here   there   is   no   approved   towing   arm   available...
Procedure
 
for
 
having
 
your
 
vehicle
 
towed
 
or
 
for
 
towing
 
another   vehicle   using   the   towing   eye.
Access to the tools
7
Practical information