Seat Ibiza ST 2016 Owner's manual

Driving
Avoid short journeys
T o r
educ e the c
onsumption and emission of
polluting exhaust gases, the engine and the
exhaust gas filtration systems should reach
the optimum operating temperature.
With the engine cold, fuel consumption is
proportionally higher. The engine does not
warm up and fuel consumption does not nor-
malise until having driven approximately four
kilometres (2.5 miles). This is why we recom-
mend avoiding short trips whenever possi-
ble.
Maintain the correct tyre pressures
Bear in mind that keeping the tyres at an ad-
equate pressure saves fuel. If the tyre pres-
sure is just one bar (14.5 psi/100 kPa) too
low, fuel consumption can increase by as
much as 5%. Due to the greater rolling resist-
ance, under-inflation also increases tyre wear
wear and impairs handling.
The tyre pressures should always be checked
when the tyres are cold.
Do not use winter tyres all year round as they
increase fuel consumption by up to 10%.
Avoid unnecessary weight
Given that every kilo of extra weight will in-
crease the fuel consumption, it is advisable
to always check the luggage compartment to
make sure that no unnecessary loads are be-
ing transported. A roof rack is often left in place for the sake
of conv
enience, even when it is no longer
needed. At a speed of 100 km/h (62 mph)
and 120 km/h (75 mph) your vehicle will use
about 12% more fuel as a result of the extra
wind resistance caused by the roof rack even
when it is not in use.
Save electricity
The engine activates the alternator, which
produces electricity. With the need for elec-
tricity, fuel consumption also increases. Be-
cause of this, always turn off electrical devi-
ces when you do not need them. Examples of
devices that use a lot of electricity are: the
blower at high speeds, the rear window heat-
ing or the seat heaters*. Note
● If y our

vehicle has Start-Stop, it is not rec-
ommended that you switch this function off.
● It is recommended that you close the win-
do
ws when driving at more than 60 km/h
(37 mph)
● Do not drive with your foot resting on the
clutch pe
dal, as the pressure can make the
plate spin, more fuel will be used and it can
burn the clutch plate lining, causing a serious
fault.
● Do not hold the car on a hill with the clutch,
use the foot br
ake or hand brake, using the
latter to start. The fuel consumption will be lower and you will prevent the clutch plate
from being d
am

aged.
● On descents, use the engine brake, chang-
ing to the ge
ar that is more suitable for the
slope. Fuel consumption will be “zero” and
the brakes will not suffer. Engine management and ex-
haus
t

gas purification system
Introduction WARNING
● Becau se of

the high temperatures which
can occur in the exhaust purification system
(catalytic converter or diesel particulate fil-
ter), do not park the vehicle where the ex-
haust can come into contact with flammable
materials under the car (e.g. on grass or at
the forest edge). Fire hazard!
● Do not apply wax underneath the vehicle
around the are
a of the exhaust system: Fire
hazard! Note
While the control lamps , ,  or  re-
main lit, ther e m

ay be engine problems, fuel
consumption may increase and the engine
may lose power. 169
Technical data
Advice
Operation
Emergencies
Safety

Operation
Catalytic converter To maintain the useful life of the catalytic
conv
er
ter
– Use only unleaded petrol with petrol en-
gines, as l

ead damages the catalytic con-
verter.
– Do not let the fuel get too low in the tank.
– For engine oil changes, do not replenish
with too much en

gine oil ››› page 206, Top-
ping up engine oil.
– Never tow the vehicle to start it, use jump
lea d

s if necessary ›››
 page 52.
If you notice misfiring, uneven running or
loss of power when the vehicle is moving, re-
duce speed immediately and have the vehi-
cle inspected at the nearest specialised
workshop. In general, the exhaust warning
lamp will light up when any of the described
symptoms occur ›››
page 100. If this hap-
pens, unburnt fuel can enter the exhaust sys-
tem and escape into the environment. The
catalytic converter can also be damaged by
overheating. CAUTION
Never run the fuel tank completely dry be-
cause the irr e

gularity of the fuel supply may
cause ignition problems. This allows unburnt
fuel to enter the exhaust system, which could
cause overheating and damage the catalytic
converter. For the sake of the environment
Even when the emission control system is
workin g per

fectly, there may be a smell of
sulphur from the exhaust gas under some
conditions. This depends on the sulphur con-
tent of the fuel used. Quite often the problem
can be solved by changing to another brand
of fuel. Diesel engine particulate filter*
Fig. 173
Vehicle data sticker on back cover of
the M aint
enanc

e Programme. Your vehicle is fitted with a DPF (Diesel Partic-
u
l
at e Fi

lter) if the vehicle data sticker (back
cover of the “Maintenance Programme”) lists
the code PR 7GG ››› Fig. 173.
The diesel engine particulate filter eliminates
most of the soot from the exhaust gas sys-
tem. Under normal driving conditions, the fil-
ter cleans itself. If this is not possible (for ex- ample, multiple short trips) the filter will be
obstruct

ed by soot and  the diesel engine
particulate filter warning lamp will light up.
This does not represent a fault, it is a warning
that indicates that the filter has not been
able to regenerate automatically and that you
must perform a cleaning cycle, as indicated
below.
Accumulation of soot in the diesel engine
particulate filter* 
If the control lamp  lights up you should
help the filter clean itself by driving in the ap-
propriate manner.
To do this, drive about 15 minutes in fourth
or fifth gear (automatic gearbox: S gear
range) at a minimum speed of 60 km/h
(37 mph), with the engine running at approxi-
mately 2,000 rpm. In this way, the soot build
up in the filter is burned. When cleaning is
successful, the control lamp turns off.
If the lamp  does not turn off, or the three
lamps turn on (particulate filter , fault in
the emission control system  and glow
plugs ), drive the vehicle to a specialised
workshop and have the fault repaired at the
earliest opportunity. WARNING
Always drive according to the road weather
conditions, the t err

ain and traffic. Driving rec-
ommendations should never lead to illegal
manoeuvres in surrounding traffic. 170

Driving
CAUTION
● Your v ehic
le is not designed to use biodie-
sel fuel. Never, under any circumstances re-
fuel with biodiesel. The use of biodiesel fuel
could damage the engine and the fuel sys-
tem. The addition of biodiesel to diesel by
the diesel producer in accordance with stand-
ard EN 590 is authorised and will not cause
damage to the engine or the fuel system.
● Using diesel fuel with a high sulphur con-
tent ma
y significantly reduce the useful life of
the diesel particulate filter. Your Technical
Service will be able to tell you which coun-
tries have diesel with a high sulphur content. Engine management* 
This warning lamp monitors the engine man-
ag
ement
sys

tem for petrol engines.
The warning lamp  (Electronic Power Con-
trol) lights up when the ignition is switched
on while system operation is being verified. It
should go out once the engine is started.
If there is a fault in the electronic engine
management system while you are driving,
this warning lamp will light up. Take the vehi-
cle to a specialised workshop as soon as
possible and have the engine checked. Emission control system*  Control lamp
 flashes:
When ther
e is misfiring that can damage the
catalytic converter. Reduce speed and drive
carefully to the nearest specialised workshop
to have the engine checked.
The control lamp  lights up:
If a fault has developed during driving which
has reduced the quality of the exhaust gas
(e.g. lambda probe fault). Reduce speed and
drive carefully to the nearest specialised
workshop to have the engine checked.
Engine pre-heating/fault system*  The warning lamp lights up to show that the
glo
w p
lugs

are preheating the diesel engine.
The control lamp  lights up
If the control lamp  lights up when the en-
gine is started it means that the glow plugs
are preheating. The engine can be started
straight away when the lamp switches off.
Control lamp  flashes
If a fault develops in the engine management
system while you are driving, the glow plug
system lamp will flash . Take the vehicle to
a specialised workshop as soon as possible
and have the engine checked. Driving tips
Driving abro
ad To drive abroad, the following must be taken
into con
s

ideration:
● For vehicles fitted with a catalytic converter
ensure th
at unleaded petrol is available for
the journey. See the chapter “Refuelling”. Au-
tomobile organisations will have information
about service station networks selling unlea-
ded fuel.
● In some countries, it is possible that your
car model i s

not sold, and therefore some
spare parts are not available or the technical
services may only be able to carry out limited
repairs.
SEAT importers and distributors will gladly
provide information about the technical prep-
aration that your vehicle requires and also
about necessary maintenance and repair
possibilities.
Adhesive strips for headlights
In countries where vehicles drive on the other
side of the road to your home country, the
asymmetric dipped beam may dazzle drivers
of oncoming vehicles. »
171
Technical data
Advice
Operation
Emergencies
Safety

Operation
To prevent dazzling, you must apply stickers
t o c
ert
ain parts of the headlight lenses. Fur-
ther information is available at any Technical
Service.
In vehicles with adaptive headlights, the ro-
tation system must previously be disconnec-
ted. To do this, please go to a specialised
workshop.
Driving on flooded roads To prevent damage to the vehicle when driv-
in
g thr
ough w at

er, for example, along a floo-
ded road, please observe the following:
● The water should never come above the
lower edge of
the bodywork.
● Drive at pedestrian speed. WARNING
After driving through water, mud, sludge,
etc., the br ak

ing effect can be delayed slight-
ly due to moisture build-up on the discs and
brake pads. Applying the brakes carefully
several times will remove the moisture and
restore the full braking effect. CAUTION
● Driving thr ough flooded ar

eas may severely
damage vehicle components such as the en-
gine, transmission, running gear or electrical
system. ●
Whenever drivin g thr

ough water, the Start-
Stop system* must be switched off
››› page 172. Note
● Chec k the depth of the w

ater before enter-
ing the flooded zone.
● Do not stop in the water, drive in reverse, or
stop the engine in an
y situation.
● Note that vehicles travelling in the opposite
direction may
splash water that could exceed
the maximum permitted water height for your
vehicle.
● Avoid driving through salt water (corro-
sion). Driver assistance systems
St ar
t-

Stop System*
Description and operation The Start-Stop function stops the engine
when the vehic
l

e is stopped and starts it au-
tomatically when required.
Vehicles with a manual gearbox
– When the vehicle is stopped, put it into
neutral and r el

ease the clutch pedal. The
engine will switch off. The warning lamp 
will appear on the instrument panel dis-
play.
– When the clutch pedal is pressed the en-
gine will

start up again. The warning lamp
will switch off.
Vehicles with an automatic gearbox
– Use the foot brake to bring the vehicle to a
stop and keep the br

ake pedal pressed
down with your foot. The engine will switch
off. The warning lamp  will appear in the
display.
– When you take your foot off the brake pedal
the engine wil

l start up again. The warning
lamp will switch off.
172

Driver assistance systems
Start-Stop function conditions
● The driver seat belt must be buckled.
● The bonnet must be closed.
● The engine must be at operating tempera-
t ur
e.
● The s t
eering wheel must be straight.
● The vehicle must be on flat ground.
● The vehicle must not be in reverse.
● A trailer must not be connected.
● The temperature of the interior must be
within the comfor
t limits (A/C button should
be sel ect
ed).
● The w ind
screen de-mist function must be
off.
● If in an incr

ease in airflow is not request
ed.
● The temperature must not be set to HI or
LO .
● The driver door must be closed.
● The diesel particulate filter must not be in
regener
ation mode, for diesel engines.
● The battery charge must not be low for the
next st
art.
● Battery temperature must be between -1 °C
(+30 °F) and +55 °C (+131 °F).
Star

t-Stop function interruption
In the following situations, the Start-Stop
function will be interrupted and the engine
will automatically start: ●
The vehicl
e starts moving.
● The brake pedal is pressed several times in
a row.
● The b

attery has been discharged excessive-
ly.
● The Star

t-Stop System is manually deacti-
vated.
● The wind

screen de-mist function is turned
on.
● The temperature of the interior exceeds the
comfort
limits ( A/C button).
● If the airflow is increased by more than 3
pr e
sse

s.
● Temperature setting HI or LO is select
ed.
● The engine coolant temperature is insuffi-
cient.
● The altern

ator is faulty, for example the V-
belt has
ruptured.
● If any of the conditions described in the
previous
section are not fulfilled.
When the engine is turned off by the Start-
Stop function, this is displayed on the instru-
ment panel.
If the Start-Stop system is not switched on,
the  warning lamp will appear on the instru-
ment panel. WARNING
Never allow the vehicle to move with the en-
gine off for an y

reason. You could lose control
of your vehicle. This could cause an accident
and serious injury.
● The brake servo does not work with the en-
gine off. You need mor
e force to stop the vehi-
cle.
● Power steering does not work when the en-
gine is not ru
nning. That is why it is much
more difficult to turn the steering wheel.
● Turn off the Start-Stop system when driving
through water (f
ording streams, etc.). Note
● For v ehic

les with the Start-Stop function
and a manual gearbox, when the engine is
started, the clutch must be pressed.
● When the conditions for the Start-Stop
function are not
fulfilled, the instrument pan-
el displays the Start-Stop indicator dimmed.
● If the steering wheel is turned more than
270°, it wil
l not be possible to start the vehi-
cle again. To start the vehicle, straighten the
steering wheel so that it is turned less than
270°.
● There are different versions of the dash
panel; the disp
lay of indications on the
screen may differ. 173
Technical data
Advice
Operation
Emergencies
Safety

Operation
Activating and deactivating the Start-
St op f
unction Fig. 174
The Start-Stop function button. Every time the ignition is switched on, the
St
ar
t-
Stop function is automatically activa-
ted.
Manually deactivating the Start-Stop func-
tion
– Press the 
› ›
› Fig. 174 b

utton located on
the centre console. When the Start-Stop
function is switched off, the warning lamp
comes on.
– If the Start-Stop function is operating then
the engine star

ts immediately. Switching the Start-Stop function on manual-
ly
– Press the 
› ››
Fig. 174
butt

on located on
the centre console. The warning lamp will
switch off.
Fatigue detection (break rec-
ommendation)* Introduction 

››› t
able on page 2
The Fatigue detection informs the driver
when their driving behaviour shows signs of
fatigue. WARNING
Do not let the comfort afforded by the Fatigue
detection sys t

em tempt you into taking any
risks when driving. Take regular breaks, suffi-
cient in length when making long journeys.
● The driver always assumes the responsibil-
ity of drivin
g to their full capacity.
● Never drive if you are tired.
● The system does not detect the tiredness of
the driver in all
circumstances. Consult the in-
formation in the section ››› page 175, System
limitations. ●
In some situation s, the sy

stem may incor-
rectly interpret an intended driving manoeu-
vre as driver tiredness.
● No warning is given in the event of the ef-
fect ca
lled microsleep!
● Please observe the indications on the in-
strument panel
and act as is necessary. Note
● Fatigue detection h a

s been developed for
driving on motorways and well paved roads
only.
● If there is a fault in the system, have it
checked b
y a specialised workshop. Function and operation
Fig. 175
On the instrument panel display: fa-
tigue det ection symbo
l. Fatigue detection determines the driving be-
h
av
iour of the driv

er when starting a journey,
174

Driver assistance systems
making a calculation of tiredness. This is
c on
st
antly compared with the current driving
behaviour. If the system detects that the driv-
er is tired, an audible warning is given with a
sound and an optic warning is shown with a
symbol and complementary message on the
instrument panel display ››› Fig. 175. The
message on the instrument panel display is
shown for approximately 5 seconds, and de-
pending on the case, is repeated. The system
stores the last message displayed.
The message on the instrument panel display
can be switched off by pressing the button on the windscreen wiper lever or the
b
utt
on  on the multi function steering
wheel
›
››

 page 25.
The message can be recalled to the instru-
ment panel display using the multifunction
display ›››
 page 25.
Conditions of operation
Driving behaviour is only calculated on
speeds above about 65 km/h (40 mph) up to
around 200 km/h (125 mph).
Switching on and off
Fatigue detection can be activated or deacti-
vated in the Easy Connect system with the
button  and the function button

 ›››
page 101. A mark indicates that the ad-
ju s

tment has been activated. System limitations
The Fatigue detection h
a

s certain limitations
inherent to the system. The following condi-
tions can limit the Fatigue detection or pre-
vent it from functioning.
● At speeds below 65 km/h (40 mph)
● At speeds above 200 km/h (125 mph)
● When cornering
● On roads in poor condition
● In unfavourable weather conditions
● When a sporty driving style is employed
● In the event of a serious distraction to the
driver
Fatigue detection w

ill be restored when the
vehicle is stopped for more than 15 minutes,
when the ignition is switched off or when the
driver has unbuckled their seat belt and
opened the door.
In the event of slow driving during a long pe-
riod of time (below 65 km/h, 40 mph) the
system automatically re-establishes the tired-
ness calculation. When driving at a faster
speed the driving behaviour will be recalcula-
ted. Parking aid
General inf
ormation Various systems are available to help you
when parkin
g or m

anoeuvring in tight
spaces, depending on the equipment fitted
on your vehicle.
The rear parking aid is an audible assistant
that warns about obstacles located behind
the vehicle ››› page 176.
During parking, Parking System Plus assists
the driver by visually and audibly warning
them about obstacles detected in front and
behind the vehicle ››› page 177. WARNING
● Alwa y

s pay attention, also when looking
straight ahead, to traffic and the vehicle sur-
roundings. The assistance systems are not a
replacement for driver awareness. When in-
serting or removing the vehicle from a park-
ing space, or when performing similar ma-
noeuvres the driver always assumes the re-
sponsibility.
● Adapt your speed and driving style at all
times to s
uit visibility, weather, road and traf-
fic conditions.
● The ultrasound sensors have blind spots in
which obs
tacles and people are not regis-
tered. Pay special attention to children and
animals. » 175
Technical data
Advice
Operation
Emergencies
Safety

Operation
●
Alwa y
s keep visual control of the vehicle
surroundings: use the mirrors for additional
help. CAUTION
Parking Aid functions may be negatively af-
f ected b y

different factors that may lead to
damage to the vehicle or its immediate sur-
rounds:
● Under certain circumstances, the system
does not det
ect or display certain objects:
– Objects such as chains, trailer draw bars,
fences, posts and thin trees.
– Objects that are located above the sen-
sors, such as protrusions in a wall.
– Objects with certain surfaces or struc-
tures, such as wire mesh fences or pow-
der snow.
● Certain surfaces of objects and garments
do not reflect
the ultrasound sensors' sig-
nals. The system cannot detect, at least cor-
rectly, these objects or people wearing such
clothes.
● Ultrasound sensor signals may be affected
by ext
ernal sound sources. In certain circum-
stances this may prevent them from detect-
ing people or objects.
● Please note that low obstacles detected by
the system m
ay no longer be registered by
the sensors as the car moves closer, so the
system will not give any further warning. In
certain circumstances, objects such as high kerbs that could damage the bottom of the
vehicl
e ar

e not detected either.
● If the first warning from the ParkPilot is ig-
nored, the vehic
le could suffer considerable
damage.
● The knocks or damage on the radiator
grille, b
umper, wheel arch and vehicle under-
body can adjust the orientation of the sen-
sors. This can affect the parking aid function.
Have the function checked by a specialised
workshop. Note
● In cert ain s

ituations, the system can give a
warning even though there is no obstacle in
the detected area, e.g:
–with rough or cobbled floors or ground
with long grass;
– with external ultrasound sources, such as
cleaning vehicles or other vehicles;
– In downpours, intense snow or dense ex-
haust gases;
– if the registration plate (front or rear) is
not properly affixed to the bumper sur-
face;
– or in locations such as the brow of a hill.
● In order to guarantee good system opera-
tion, keep the ultra
sound sensors clean, free
of snow or ice, and do not cover them with
adhesives or other objects.
● If you use high-pressure or vapour equip-
ment to cl
ean the ultrasound sensors, apply it directly only very briefly and always from a
dist
anc

e of more than 10 cm.
● Retrofitting of accessories to the vehicle,
such as
a bicycle rack, may interfere with the
operation of the Parking Aid.
● In order to familiarise yourself with the sys-
tem, it is
advised that you practice parking in
an area or car park that is free from traffic.
There must be good weather and light condi-
tions.
● The volume and tone of the warnings can
be modified, in addition to the indic
ations
››› page 179.
● In vehicles without a driver inf
ormation
system, these parameters can be modified in
a SEAT Official Service or in a specialised
workshop.
● Please observe information on towing a
trailer ›

›› page 180.
● The display on the Easy Connect screen
shows a s
light time delay. Rear parking aid*
The rear Parking Aid assists the driver in
p
ark
ing b

y means of audible warning
sounds.
Description
There are sensors integrated in the rear
bumper. When the sensors detect an obsta-
cle, you are alerted by audible warnings.
176

Driver assistance systems
Make particularly sure that the sensors are
not c
ov
ered by adhesives, residues and the
like, as this could affect the system's opera-
tion. Cleaning instructions ››› page 194.
The approximate measurement range of the
rear sensors is:
side area0.60 m
central area1.60 m As you approach the obstacle, the time inter-
val betw
een the audib

le warnings will be re-
duced. When you reach around 0.30 m the
warning will be constant: Do not continue to
move forward (or backward) ››› in General
inf orm
ation on p ag

e 175, ››› in General in-
f orm
ation on p ag
e 176 !
If you maintain separation from the obstacle,
the volume of the warning begins to reduce
after four seconds (does not affect the tone
of the constant warning).
Activating/Deactivating
When engaging reverse gear, the parking aid
is automatically switched on. This is con-
firmed with a short warning.
On disengaging reverse gear, the Parking Aid
system is disconnected immediately. Parking system plus*
Fig. 176
Represented area. Parking system plus assists you audibly and
v
i
s ual

ly when parking.
There are sensors integrated in the front and
rear bumpers. When they detect an obstacle,
you are alerted by audible warnings and visu-
ally on the Easy Connect system.
In the event of danger of a frontal collision,
the audible warnings come from the front of
the vehicle, and in the event of the danger of
a rear-end collision they come from the rear.
Make particularly sure that the sensors are
not covered by adhesives, residues and the
like, as this could affect the system's opera-
tion. Cleaning instructions ››› page 194.
The approximate measurement range of the
sensors is:
1.20 m
A 0.60 m
1.60 m
0.60 m
As
y ou ap

proach the obstacle, the time inter-
val between the audible warnings will be re-
duced. When you reach around 0.30 m the
warning will be constant: do not continue to
move forward (or backward)!
If you maintain separation from the obstacle,
the volume of the warning begins to reduce
after four seconds (does not affect the tone
of the constant warning).
Parking Aid operation Fig. 177
Centre console: parking aid button. Manual connection of Parking Aid
● Press the  butt
on onc

e.»
B C
D
177
Technical data
Advice
Operation
Emergencies
Safety

Operation
Manual disconnection of Parking Aid
● Press the  butt
on a
gain.
Manual disconnection of Parking Aid display
(the audible sounds remain active)
● Press a button on the main menu of the fac-
tory-
assembled infotainment system.
● OR: press the BACK function b
utton.
Automatic connection of Parking Aid ● Engage reverse gear or turn the selector
lever to po
sition R.
● OR: If the vehicle approaches an obstacle
that i
s in its forwards path at a speed below
10 km/h (6 mph) ››› page 178, Automatic ac-
tivation. The obstacle is detected as of a dis-
tance of approx. 95 cm if the automatic con-
nection is activated in the infotainment sys-
tem. A reduced display is shown.
Automatic disconnection of Parking Aid
● Move the selector lever to position P.
● OR: accelerate to more than approx.
10 km/h (6 mph) forw
ard.
Temporary suppression of sound in Parking
Aid
● Press the function button  found on the
st

eering wheel. Change from reduced view to full view
●
Engage reverse gear or turn the selector
lever to po
sition R.
● OR: press the car icon in reduced view.
If nece
ssary, switch to the rear-assist image
(Rear View Camera “RVC”)
● Engage reverse gear or turn the selector
lever to po
sition R.
● OR: Press the RVC function b
utton.
A short confirmation signal will be heard and
the button symbol will light up yellow when
the system is switched on.
Automatic activation Fig. 178
Miniature indication of automatic ac-
tiv ation When the Parking System Plus is switched on
aut
om
atic al

ly, a miniature of the vehicle will be displayed and the segments will be
shown on the left

side of the screen
››› Fig. 178.
Automatic activation occurs when slowly ap-
proaching an obstacle located in front of the
vehicle. It only operates every time the speed
is reduced below approximately 10 km/h (6
mph) for the first time.
If the parking aid is switched off using the 
button, the following actions must be carried
out in order for it to automatically switch on:
● Switch off the ignition and switch it on
again.
● OR: acc

elerate above 10 km/h (6 mph) be-
fore r
educing speed below this number
again.
● OR: place the selector lever in position P
and then move it
from this position.
● OR: switch on and off the automatic activa-
tion in the Easy
Connect system menu.
The automatic activation with parking aid
miniature indication can be switched on and
off from the Easy Connect system menu
›››  page 24:
● Switch the ignition on.
● Select: CAR button > Settings
> Parking
and manoeuvring .
● Select the Automatic activation op-
tion. When the f
unction b

utton check box is
activated , the function is on.
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