2017 Seat Mii ECU

The essentials
CAUTION
● Remo v
e the snow chains to drive on roads
without snow. Otherwise they will impair
vehicle handling, damage the tyres and wear
out very quickly.
● Wheel rims may be damaged or scratched if
the chain
s come into direct contact with
them. SEAT recommends the use of covered
snow chains. Note
Snow chains are available in different sizes
acc or

ding to the vehicle type. Emergency towing of the vehi-
c
l
e
T

owing Fig. 58
Right side of the front bumper: tow-
line anc hor
ag

e screwed in. Towline anchorages
Att
ac
h the b

ar or rope to the towline ancho-
rages.
It is located with the vehicle's tools
›››  page 70.
Screw the front towline anchorage into the
screw connection ››› Fig. 58 and tighten it
with the wheel brace.
Tow rope or tow bar
When towing, the tow bar is the safest and
vehicle friendly way. You should only use a
tow rope if you do not have a tow bar. A tow rope should be slightly elastic to avoid
damag

e to both vehicles. It is advisable to
use a tow rope made of synthetic fibre or sim-
ilarly elastic material.
● Only secure the tow rope or tow bar to the
towline anc
horage or specially designed fit-
ting.
Notes for the driver of the towed vehicle
● Keep the ignition running to prevent the
steerin
g wheel from locking and also to allow
the use of the turn signals, horn, windscreen
wipers and washers.
● As the power assisted steering does not
work if
the engine is not running, you will
need more strength to steer than normally.
● The brake must be depressed much harder
as the br
ake servo does not operate. Avoid
hitting the towing vehicle.
● Note the instructions and information con-
tained in the Ins
truction Manual for the vehi-
cle to be towed.
Notes for the driver of the towing vehicle
● Accelerate gently and carefully. Avoid sud-
den manoeuvr
es.
● Brake well in advance than usual and brake
gently.
● Not

e the instructions and information con-
tained in the In s

truction Manual for the vehi-
cle to be towed. 42

Safe driving
Safety
Saf e driv
in
g
Safety first! WARNING
● This m

anual contains important informa-
tion about the operation of the vehicle, both
for the driver and the passengers. The other
sections of the on-board documentation also
contain further information that you should
be aware of for your own safety and for the
safety of your passengers.
● Ensure that the on-board documentation is
kept in the
vehicle at all times. This is espe-
cially important when lending or selling the
vehicle to another person. WARNING
Driving under the influence of alcohol, drugs,
medication or n ar

cotics may result in severe
accidents and even loss of life.
● Alcohol, drugs, medication and narcotics
may
significantly alter perception, affect re-
action times and safety while driving, which
could result in the loss of control of the vehi-
cle. Driving advice
B ef
or

e driving For your own safety and the safety of your
pa
s

sengers, always note the following points
before every trip:
– Make sure that the vehicle's lights and turn
signal

s are working properly.
– Check tyre pressure.
– Ensure that all windows provide a clear and
good v

iew of the surroundings.
– Make sure all luggage is secured
›› ›

page 114.
– Make sure that no objects can interfere
with the pedal

s.
– Adjust front seat, head restraint and mir-
rors

properly according to your size.
– Ensure that the passengers in the rear
seats alw

ays have the head restraints in
the in-use position ›››
page 51.
– Instruct passengers to adjust the head re-
straints

according to their height.
– Protect children with appropriate child
seats and pr

operly applied seat belts
››› page 64.
– Assume the correct sitting position. Instruct
your pa

ssengers also to assume a proper
sitting position ›››
page 48. –
Fas
ten your seat belt securely. Instruct your
passengers also to fasten their seat belts
properly ››› page 52.
What affects driving safety? As a driver, you are responsible for yourself
and y
our p

assengers. When your concentra-
tion or driving safety is affected by any cir-
cumstance, you endanger yourself as well as
others on the road ››› , for this reason:
– Always pay attention to traffic and do not
g et di

stracted by passengers or telephone
calls.
– Never drive when your driving ability is im-
paired (e.

g. by medication, alcohol, drugs).
– Observe traffic laws and speed limits.
– Always reduce your speed as appropriate
for ro

ad, traffic and weather conditions.
– When travelling long distances, take
break

s regularly - at least every two hours.
– If possible, avoid driving when you are tired
or stre

ssed. WARNING
When driving safety is impaired during a trip,
the risk of

injury and accidents increases. 47
Technical data
Advice
Operation
Emergencies
Safety

Safe driving
WARNING
Incorrect seat adjustment may lead to acci-
dents and sev
ere injuries.
● Only adjust the seats when the vehicle is
station
ary, as the seats could move unex-
pectedly while the vehicle is in motion and
you could lose control of the vehicle. Further-
more, an incorrect position is adopted when
adjusting the seat.
● Only adjust the height, seat backrest and
forw
ards or backwards position of the seat
when there is nobody in the seat adjustment
area.
● There must be no objects blocking the front
seat a
djustment area. Adjusting the rear head restraints
Fig. 66
Adjusting the rear head restraints All seats are equipped with a head restraint. The front seat head restraints are integrated
in the b
ac
k

rests and adjusting them is not
possible.
Adjusting height
● Push the head restraint up or down in the
direction of the arr
ow with the button press-
ed ››› Fig. 66 1
› ›› .
● The head restraint must engage securely in
po s
ition.
C

orrect adjustment of head restraints
Adjust the head restraint so that its upper
edge is at the same level as the top of your
head, or as close as possible to the same lev-
el as the top of your head and under no cir-
cumstances below eye level. Keep the back
of your neck as close as possible to the head
restraint.
Adjusting the head restraint for short people
Set the head restraint in the first anchorage
position, even if your head is below its upper
edge. When the head restraint is at its low-
est, it is possible that a small gap remains
between it and the seat backrest.
Adjusting the head restraint for tall people
Raise the head restraint completely. WARNING
Travelling with the head restraints removed
or improperly a

djusted increases the risk of
severe or fatal injuries in the event of acci-
dents and sudden braking or manoeuvres.
● Always fit and adjust the head restraint
properly whenev
er a person is occupying a
seat.
● All vehicle occupants must correctly adjust
the head r
estraint according to their height to
reduce the risk of back injuries in the event of
an accident. The upper edge of the head re-
straint must be as close as possible to the
same level as the top of your head and under
no circumstances below eye level. Keep the
back of your neck as close as possible to the
head restraint.
● Never adjust the head restraint while the
vehicl
e is in motion. Pedal area
P ed
a

ls Do not allow floor mats or other objects to
o
b
s

truct the free passage of the pedals.
Floor mats should leave the pedal area free
and unobstructed and be correctly secured in
the footwell zone. »
51
Technical data
Advice
Operation
Emergencies
Safety

Safety
In the event of failure of a brake circuit, the
br ak
e ped
al must be pressed harder than
normal to brake the vehicle. WARNING
Objects falling into the driver's footwell could
prev ent

use of the pedals. This could lead the
driver to lose control of the vehicle, increas-
ing the risk of a serious accident.
● Make sure the pedals can be used at all
times, with no o
bjects rolling underneath
them.
● Always secure the mat in the footwell.
● Never place other mats or rugs on top of
the original
mat supplied by the factory.
● Ensure that no objects can fall into the driv-
er's footw
ell while the vehicle is in motion. CAUTION
The pedals must always have free and unob-
struct ed p

assage to the floor. For example, in
case of a fault in the brake circuit, the brake
pedal will need to be pressed further to stop
the vehicle. To press the brake pedal down
further will require more force than usual. Seat belts
Wh y
w

ear a set belt
Introduction Check the condition of all the seat belts at
re
gu

lar intervals. If you notice that the belt
webbing, fittings, retractor mechanism or
buckle of any of the belts is damaged, the
belt must be replaced immediately by a spe-
cialised workshop ››› . The specialised
w ork
shop mu

st use the appropriate spare
parts corresponding to the vehicle, the
equipment and the model year. SEAT recom-
mends taking your car in for technical serv-
ice. WARNING
Unbuckled or badly buckled seat belts in-
cr e

ase the risk of severe or even fatal inju-
ries. The seat belt cannot offer its full protec-
tion if it is not fastened and used correctly.
● Seat belts are the most effective way of re-
ducing the ri
sk of sustaining severe or fatal
injuries in the event of an accident. Seat belts
must be correctly fastened when the vehicle
is in motion to protect the driver and all vehi-
cle occupants.
● Before each trip, every occupant in the ve-
hicle oc
cupants must sit properly, correctly
fasten the seat belt belonging to his or her
seat and keep it fastened throughout the trip. This also applies to other vehicle occupants
when drivin
g in t

own.
● When travelling, children must be secured
in the vehic
le with a child restraint system
suitable for their weight and height and with
the seat belts correctly fastened
››› page 64.
● Instruct your passengers to fasten their
seat belt
s properly before driving off.
● Insert the latch plate into the buckle for the
appropri
ate seat and ensure it is engaged.
Using the latch plate in the buckle of another
seat will not protect you properly and may
cause severe injuries.
● Do not allow liquids or foreign bodies to en-
ter the buc
kle fastenings. This could damage
the buckles and seat belts.
● Never unbuckle your seat belt when the ve-
hicle i
s moving.
● Never allow more than one passenger to
share the s
ame seat belt.
● Never hold children or babies on your lap
sharing the s
ame seat belt.
● Bulky and unbuttoned clothing, such as a
coat
worn over a sweatshirt, impairs the
proper fit and function of the seat belt. WARNING
It is extremely dangerous to drive using dam-
aged se at

belts and could result in serious in-
jury or loss of life. 52

Safety
How to properly adjust your
se at
belt
F
astening and unfastening seat belt Fig. 72
Positioning and removing the seat
belt b
uc

kle. Fig. 73
Position of seat belt during pregnan-
cy . Properly worn seat belts hold the vehicle oc-
c
up
ants

in the position that most protects
them in the event of an accident or sudden
braking ››› .
F a
s

tening the seat belt
Fasten your seat belt before each trip.
● Correctly adjust the front seat ›››

page 48.
● Engage the seat backrest in the upright po-
sition and corr
ectly adjust the hear restraint
››› .
● Pull the latch plate and place the belt web-
b in
g ev

enly across your chest and lap. Do not
twist the seat belt when doing so ››› .
● Engage the latch plate in the buckle of the
c orr
e

sponding seat ›››
Fig. 72 A. ●
Pul
l the belt to ensure that the latch plate is
securely engaged in the buckle.
Unfastening the seat belt
The seat belt must not be unfastened until
the vehicle has come to a standstill ››› .
● Press the red button on the buckle
› ›
›

Fig. 72 B. The latch plate is released from
the buckle.
● Guide the belt back by hand so that it rolls
up eas
ily and the trim will not be damaged.
Correct seat belt position
Seat belts offer their maximum protection in
the event of an accident and reduce the risk
of sustaining severe or fatal injuries only
when they are properly positioned. Further-
more, if the webbing is correctly positioned,
the seat belt will hold the vehicle occupants
in the optimum position to ensure the airbag
provides the maximum protection. The seat
belt must therefore always be worn and the
webbing correctly positioned.
Incorrectly worn seat belts can cause severe
or even fatal injuries ››› page 48, Correct po-
sition of the vehicle occupants .
● The shoulder part of the seat belt must lie
on the centre of
the shoulder, never across
the neck or the arm, under the arm or behind
the shoulder.
56

Airbag system
WARNING
● The seat belt
s and airbags can only provide
maximum protection if the occupants are
seated correctly ››› page 48.
● If a fault has occurred in the airbag system,
have the sy
stem checked immediately by a
specialised workshop. Otherwise, during a
frontal collision the system might not trigger
correctly or may fail to trigger at all. Airbag activation
The airbags deploy extremely rapidly, within
thou
s
andths

of a second, to provide addi-
tional protection in the event of an accident.
A fine dust may develop when the airbag de-
ploys. This is normal and it is not an indica-
tion of fire in the vehicle.
The airbag system is only ready to function
when the ignition is on.
In special accidents instances, several air-
bags may activate at the same time.
In the event of minor head-on and side colli-
sions, rear-end collisions, overturning or roll-
over of the vehicle, airbags do not activate.
Activation factors
The conditions that lead to the airbag system
activating in each situation cannot be gener-
alised. Some factors play an important role,
such as the properties of the object the vehi- cle hits (hard/soft), angle of impact, vehicle
speed, etc

.
Deceleration trajectory is key for airbag acti-
vation.
The control unit analyses the collision trajec-
tory and activates the respective restraint
system.
If the deceleration rate is below the prede-
fined reference value in the control unit the
airbags will not be triggered, even though
the accident may cause extensive damage to
the car.
The following airbags are triggered in seri-
ous head-on collisions ● Driver airbag.
● Front passenger front airbag
The fol
lowing airbags are triggered in seri-
ous side-on collisions
● Front side airbag on the side of the acci-
dent.
● Re

ar side airbag on the side of the acci-
dent.
In an acc

ident with airbag activation:
● the interior lights switch on (if the interior
light swit
ch is in the courtesy light position);
● the hazard warning lights switch on;
● all doors are unlocked; ●
the fuel s
upply to the engine is cut.
Airbag safety instructions Front airb
ags Read the additional information carefully
›› ›

 page 14. WARNING
The airbag is deployed at high speed in frac-
tions of

a second.
● Always keep the deployment areas of the
front airb
ags vacant.
● Never secure objects to the covers or in the
deployment
area of the airbag modules, e.g.
drink holders or phone supports.
● The deployment space between the front
pas
sengers and the airbags must not in any
case be occupied by other passenger, pets
and objects.
● Never fix any object to the windscreen
above the fr
ont airbag on the front passenger
side.
● Do not alter, cover or stick anything to the
steerin
g wheel hub or the surface of the air-
bag module on the passenger side of the
dash panel. » 61
Technical data
Advice
Operation
Emergencies
Safety

Safety
Transporting children safely Saf ety
f
or children
Introduction Before transporting babies and children in a
chi
l

d seat placed in the front passenger seat,
first completely read the information regard-
ing the airbag system.
This information is extremely important for
driver and passenger safety, particularly that
of babies and children.
SEAT recommends the use of child seats from
the SEAT accessory programme. These child
seats have been designed and tested for use
in SEAT vehicles. You can purchase child
seats with different mountings from a SEAT
dealership. WARNING
Make sure children are properly belted in and
corr ectly

secured to avoid severe or fatal inju-
ries while the vehicle is in motion.
● Never use a rear-facing child seat in the
front p
assenger seat if the front passenger
front airbag is enabled.
● Children up to 12 years old should always
travel
on the rear seat. ●
Chil dr

en must always be protected with an
approved child restraint system suited to
their height and weight.
● Children must assume the proper sitting
position and be pr
operly belted in while trav-
elling.
● Ensure the seat backrest is upright when a
chil
d seat is being used on it.
● Do not allow the child's head or other part
of his
or her body to enter the deployment
area of the side airbags.
● Make sure the belt webbing is correctly
positioned.
● Nev

er hold children or babies on your lap or
in your arms.
● On

ly one child may occupy a child seat.
● Please read and observe the child seat
manufact
urer's handling instructions. WARNING
An empty or loose child seat could fly uncon-
tro l

lably around the vehicle interior and
cause injuries in the event of an accident or
sudden braking.
● When not in use while the vehicle is in mo-
tion, alwa
ys safely secure the child seat or
store it in the luggage compartment. Note
Replace the child seat after an accident, as it
ma y

have invisible damage. Important information regarding the
fr
ont
p

assenger's airbag Read the additional information carefully
›› ›

 page 16.
Read and always observe the safety informa-
tion included in the following chapters: ● Safety distance with respect to the passen-
ger airbag ›

›› in Introduction on page 59.
● Objects between the passenger and the
pa s

senger side airbag ››› in Front airbags
on p ag
e 61
.
The passenger side front airbag, when ena-
bled, is a serious risk for a child that is facing
backward since the airbag can strike the seat
with such force that it can cause serious or
fatal injuries. Children up to 12 years old
should always travel on the rear seat.
Therefore we strongly recommend you to
transport children on the rear seats. This is
the safest location in the vehicle. Alternative-
ly, the front passenger airbag can be disa-
bled with a key-operated switch ›››
page 63.
When transporting children, use a child seat
suitable for the age and size of each child
››› page 67.
64

Transporting children safely
WARNING
● If a c hi
ld seat is secured to the front pas-
senger seat, the risk to the child of sustain-
ing critical or fatal injuries in the event of an
accident increases.
● An inflating front passenger airbag can
strike the r
ear-facing child seat and project it
with great force against the door, the roof or
the backrest.
● Never install a child seat facing backwards
on the front p
assenger seat unless the front
passenger front airbag has been disabled.
Risk of potentially fatal injuries to the child!
However, if it is necessary, in exceptional ca-
ses, to transport a child in the front passen-
ger seat, the front passenger front airbag
must always be disabled ››› page 63. If the
passenger seat has a height adjustment op-
tion, move it to the highest, most upright po-
sition. If you have a fixed seat, do not install
any child restraint system in this location.
● For those vehicles that do not include a key
lock sw
itch to deactivate the airbag, the vehi-
cle must be taken to a technical service.
● All vehicle occupants, especially children,
must
assume the proper sitting position and
be properly belted in while travelling.
● Never hold children or babies on your lap,
this c
an result in potentially fatal injuries to
the child!
● Never allow a child to be transported in a
vehicl
e without being properly secured, or to
stand up or kneel on a seat while travelling.
In an accident, the child could be flung through the vehicle, causing possibly fatal in-
juries
t

o themselves and to the other vehicle
occupants.
● If children assume an improper sitting posi-
tion when the vehic
le is moving, they expose
themselves to greater risk of injury in the
event of a sudden braking manoeuvre or in an
accident. This is particularly important if the
child is travelling on the front passenger seat
and the airbag system is triggered in an acci-
dent; as this could cause serious injury or
even death.
● A suitable child seat can protect your child!
● Never leave a child alone in the child seat
or inside the
vehicle because depending on
the season, very high temperatures may be
reached inside a parked vehicle, which could
be fatal.
● Children who are less than 1.5 metres tall
must
not wear a normal seat belt without a
child seat, as this could cause injuries to the
abdominal and neck areas during a sudden
braking manoeuvre or in an accident.
● Do not allow the seat belt to become twis-
ted and the seat
belt should be properly in
place ››› page 52.
● Only one child may occupy a child seat
›››

page 67.
● When a child seat is mounted in the rear
seats, the door c
hild-proof lock should be ac-
tivated ››› page 99. Child seats
Saf ety
in

structions Read the additional information carefully
›› ›

 page 16. WARNING
The lower anchor points for child seats do not
include rin g

s. Only secure booster seats to
lower anchor points. WARNING
Child seats with lower anchor points and with
an upper r et

aining strap must be installed in
line with the manufacturer's instructions.
Failure to comply could result in severe inju-
ries.
● Always secure just one r
etaining strap to a
child seat with the luggage compartment re-
taining ring.
● Always use the correct retaining rings for
the retainin
g strap.
● Never secure the retaining strap to a retain-
er. WARNING
In general, the rear seat is always the safest
pl ac

e for children, who are belted correctly, in
the event of an accident.
● A suitable child seat that is correctly instal-
led and used on one of
the rear seats offer » 65
Technical data
Advice
Operation
Emergencies
Safety