2012 Seat Mii ECU

212Vehicle care and maintenance
perfect condition on the outside and which have a tread depth within the
values stipulated by the Law ⇒ 
.
The date of manufacture, part of the tyre identification number (TIN), indi-
cates the age of the tyre ( ) ⇒ page 218.
Storing tyres
Mark tyres when you remove them to indicate the direction of rotation (left,
right, forwards, backwards). This ensures you will be able to mount them
correctly when you replace them. When removed, the wheels and/or tyres
should be stored in a cool, dry and preferably dark location. Do not place
tyres mounted on the wheel in a vertical position.
Protect tyres not mounted on wheels from dirt by storing them in suitable
bags and standing them on the ground on their tread.
WARNING
Aggressive fluids or substances could result in visible or invisible dam-
age with the consequent risks.
● Always ensure that tyres do not come into contact with chemical
products, oil, grease, fuel, brake fluid or other aggressive substances.
WARNING
Old tyres, even if they have never been used, may lose air or burst unex-
pectedly while driving, resulting in serious accident or damage.
● If tyres are over six years old, they should only be used in an emer-
gency and with extreme caution.
For the sake of the environment
Old tyres must be disposed of by qualified personnel according to the laws
in the country concerned. Wheel rims
The design of wheel bolts is matched to the rims. If different rims are fitted,
the correct wheel bolts with the right length and correctly shaped bolt
heads must be used. This ensures that wheels are fitted securely and that
the brake system functions correctly
⇒ page 250.
For technical reasons, it is not generally possible to use the wheels from
other vehicles. In some cases, this may also be true for the same model of
wheel.
The tyres and rims approved by SEAT are specially matched to the character-
istics of the vehicle and are critical to good road holding and safe handling.
Wheel bolts
Wheel bolts must be tightened to the correct torque ⇒ page 250.
Beadlock wheel rims
Beadlock wheel rims have various components. These are joined together
by special bolts using a special procedure. This ensures good performance,
a better seal, improved safety and wheel run out. Therefore, worn rims
should always be replaced and must only be repaired in a Specialised work-
shop. SEAT recommends visiting a Technical Service ⇒ 
.
Wheel trims with bolted trims
Wheel trims may be fitted with interchangeable trim parts which are attach-
ed to the rim using self-locking bolts. Worn trims should only be replaced at
a Specialised workshop. SEAT recommends visiting a Technical Service
⇒ 
. 

217
Vehicle care and maintenance
Running gear settings : an incorrectly positioned running gear increases the
wear of tyres and affects your safety while driving. If tyres wear too quickly,
have the wheel alignment checked at a Specialised workshop.
WARNING
If you notice unusual vibration or the vehicle pulls to one side while driv-
ing, this may indicate that one of the tyres is damaged.
● Reduce speed immediately and stop, while observing the highway
code.
● Check the wheels and tyres for damage.
● Never carry on driving on worn tyres or wheels. Request qualified as-
sistance immediately.
● If there is no visible exterior damage, drive slowly and carefully to the
nearest Specialised workshop and have the vehicle checked.

Spare wheel or temporary spare wheel*
Fig. 123 In the luggage
compartment: hand con-
trolled wheel for securing
the spare wheel Removing the spare wheel
●
Open the rear lid and lift the luggage compartment shelf ⇒ page 100.
● If necessary, remove the luggage compartment variable floor
⇒ page 100.
● Lift up the carpet from the recess and remove it from the luggage com-
partment.
● If necessary, take out the vehicle tool kit with the container.
● Completely remove the hand controlled wheel from the centre of the
spare wheel ⇒ Fig. 123 by turning it in an anticlockwise direction, and take
out the spare wheel.
Storing the replaced wheel
● Pull back the carpet.
● With the wheel rim facing downwards, situate the replaced wheel in the
spare wheel well so that the wheel rim central hole coincides with the open-
ing.
● Turn the hand controlled wheel with the shank screwed clockwise until
the replaced wheel is secured.
● If necessary, store the vehicle tool in the container, inside the luggage
compartment.
● Replace the carpet on the luggage compartment floor.
● Lower the rear shelf.
● Close the rear lid.
If the spare wheel is different to the rest of the vehicle tyres
If the spare tyre is not the same as the tyres that are mounted on the vehicle
- for example with winter tyres or the temporary spare wheel - you should
only use the spare tyre for a short period of time and drive with extra care
⇒ .
Refit the normal road wheel as soon as possible.
Please observe driving advice: 
Vehicle diagramPrior to a journey...While drivingCare, cleaning and mainte-
nanceIf and whenTechnical Data

218Vehicle care and maintenance
● Do not drive faster than 80 km/h (50 mph).
● Avoid heavy acceleration, hard braking and fast cornering.
● Snow chains on the temporary spare wheel are not permitted
⇒ page 220.
● After mounting the spare wheel or the temporary spare wheel, check the
tyre pressure as soon as possible ⇒ page 214.
It is advisable to check the spare wheel or temporary spare wheel tyre pres-
sure when checking the rest of the vehicle wheels at least once a month.
The spare wheel should have the highest pressure allowed for the vehicle
⇒ page 214. The sticker situated on the temporary spare wheel shows the
tyre pressure.
WARNING
Incorrect handling of the spare wheel or the temporary spare wheel can
cause loss of vehicle control, producing collisions or other serious acci-
dents and injury.
● Never use the spare wheel or the temporary spare wheel if it is dam-
aged or worn to the wear indicator.
● In some vehicles the spare wheel is smaller than the original tyres.
This can be seen on a sticker showing the text “80 km/h” and “50 mph”.
This text indicates the maximum velocity permitted for this type of tyre.
● Never drive faster than 80 km/h (50 mph). Avoid powerful accelera-
tion, hard braking and taking corners at high speed.
● Never drive more than 200 km (120 miles) with a temporary spare
wheel fitted to the drive axle.
● Replace the temporary spare wheel for a normal wheel as soon as
possible. The compact temporary spare wheel is only intended for tempo-
rary use over short distances.
● The temporary spare wheel must always be secured with the factory
supplied wheel bolts.
WARNING (Continued)
● You should never use more than one temporary spare wheel.
● After mounting the temporary spare wheel, check the tyre pressure as
soon as possible ⇒ page 214.
● Snow chains on the temporary spare wheel are not permitted.
Note
Wherever possible, secure the spare wheel, temporary spare wheel or the
replaced wheel safely in the luggage compartment. In vehicles with anti-
puncture kit, it is not possible to secure the defective wheel. 
Tyre code
Fig. 124 Universal code on tyres 

226Vehicle care and maintenance
Retro-fitting of two-way radios
An exterior aerial is required for the use of two-way radios in the vehicle.
The retro-fitting of electrical or electronic appliances in the vehicle is sub-
ject to their approval for use in your vehicle. Under certain circumstances,
this could mean that your vehicle registration documents are no longer val-
id.
SEAT has approved your vehicle for use with two-way radios providing the
following conditions are observed:
●The exterior aerial must be mounted professionally.
● The maximum transmitting power is 10 watts.
An only external aerial is needed to give the equipment its optimal reach.
Check first with a Specialised workshop if you wish to use a two-way radio
with a transmitting power of over 10 watts. The Specialised workshops are
familiar with the technical options for installation. SEAT recommends visit-
ing a Technical Service.
All legal requirements, together with the instructions for the use of two-way
radios must be observed.
WARNING
If the two-way radio is not securely fastened in position, it could be sent
flying around the vehicle in the event of sharp braking, sudden manoeu-
vres or accident, causing injury.
● While driving, two-way radios must be securely fastened in position,
outside the airbags deployment zones, or safely stowed away.
WARNING
When using a two-way radio without a connection to an exterior aerial,
the maximum permitted levels of electromagnetic radiation may be ex-
ceeded. This is also the case if the aerial has not been correctly installed.
● You should only use a two-way radio inside the vehicle if it has first
been correctly connected to an exterior aerial.

Information stored by the control units
Your vehicle is fitted at the factory with a series of electronic control units
responsible for the engine and gearbox management. In addition, the con-
trol units supervise the performance of the exhaust gas system and the air-
bag systems.
Therefore, while the vehicle is being driven, these electronic control units
are continuously analysing the vehicle data. In the event of faults or devia-
tions from the theoretical values, only this data is stored. Normally, the
warning lamps on the instrument panel light up in the event of faults.
This data can only be read and analysed using special equipment.
The storing of the data allows specialised workshops to detect and repair
faults. Stored data may include:
● Data relating to the engine or the gearbox
● Speed
● Direction of travel
● Braking force
● Detection of seat belt
The vehicle control units never record conversations held by passengers in
the vehicle. 

227
Vehicle care and maintenance
In vehicles equipped with an emergency call function via the mobile tele-
phone or other appliances connected in the vehicle, it is possible to send
the vehicle position. If the control unit records an accident with airbag acti-
vation, the system may automatically send a signal. This will depend on the
network operator. Normally, transmission is only possible in areas with
good coverage.
Event Data Recorder
The vehicle is not fitted with an event data recorder.
An event data recorder temporarily stores the vehicle information. There-
fore, in the event of accident, it is possible to obtain detailed information
about how the accident occurred. For example, in vehicles with airbag sys-
tems, data relating to speed of impact, seat belt status, seat positions and
airbag activation times may be stored. The volume of data depends on the
manufacturer.
Event data recorders can only be mounted with authorisation from the vehi-
cle owner and, in some countries, they are governed by local legislation.
Reprogramming control units
On the whole, all the data required for the component management is stor-
ed in the control units. The programming of certain convenience functions,
such as the convenience indicators, individual door opening and instruc-
tions on the display can be modified using special equipment at the work-
shop. If the comfort functions are reprogrammed, the information and In-
struction Manual descriptions will not coincide with the modified functions.
Therefore, SEAT recommends that any modifications are recorded in the sec-
tion “Other workshop notes” in the Maintenance Programme.
The SEAT Official Service must have a record of any modification to the pro-
gramming.
Reading the vehicle fault memory
There is a diagnostics connector in the vehicle interior for reading the vehi-
cle fault memory. The fault memory documents errors and deviations from
the theoretical values of the electronic control units. The diagnostics connector is in the driver side footwell area, next to the lev-
er for opening the bonnet, below a cover.
The fault memory should only be read and reset by a Specialised workshop.

Using a mobile telephone in a vehicle without connection
to an exterior aerial
Mobile telephones transmit and receive radio waves also called high-fre-
quency energy, both when in use and when on stand-by. Scientific studies
state that radio waves exceeding certain values may be harmful to the hu-
man body. International committees and authorities have established limits
and directives in order to ensure electromagnetic radiation from mobile
phones remains within certain limits that do not endanger human health.
However, there is no available conclusive scientific evidence that cordless
phones are completely safe.
That is why some experts recommend moderate use of the mobile tele-
phone, and the appliance of measures to reduce radiation on the human
body.
When a mobile telephone not connected to an exterior aerial is used inside
the vehicle, the electromagnetic radiation may be greater than if the mobile
phone were connected to a built-in aerial or to another exterior aerial.
If the vehicle is fitted with a suitable hands-free device that allows the em-
ployment of numerous additional mobile telephone functions with compati-
ble Bluetooth technology ®
, it will comply with the legislation in many coun-
tries which only permits the use of mobile phones inside vehicles using a
hands-free device.
The hands-free system of the Portable Navigation System (supplied by
SEAT) has been designed for use with conventional mobile phones and
phones with Bluetooth technology ®
⇒ page 229. Mobile telephones must
be placed in a suitable telephone support or stored safely in the vehicle. If a
support is used for the telephone, it must be securely fastened to the base 
Vehicle diagramPrior to a journey...While drivingCare, cleaning and mainte-
nanceIf and whenTechnical Data

228Vehicle care and maintenance
plate. The mobile will be secure on the instrument panel and always within
reach of the driver only by following these procedures. Mobile telephone
connection with an external aerial is carried out subject to the hands-free
device, via the telephone support or by the Bluetooth ®
connections present
in the mobile telephone and the vehicle.
If the mobile telephone is connected to an aerial incorporated into the vehi-
cle or an exterior aerial connected to the vehicle, this will help to reduce the
electromagnetic radiation transmitted and the risk to human health. It will
also improve the quality of the connection.
If the mobile telephone is used inside the vehicle without the hands-free
system, it will not be securely fastened and will not be connected to the ex-
terior aerial of the vehicle telephone. Nor will the telephone charge if it is
not on the support. In addition, some calls may break off and the quality of
the connection will be affected.
Mobile telephones should only be used inside the vehicle if they are con-
nected to a hands-free system. SEAT recommends using an external aerial
should you wish to use a mobile telephone inside the vehicle.
Bluetooth ®
is a registered trademark of Bluetooth ®
SIG, Inc.
WARNING
If the mobile telephone is not securely fastened in position, it could be
sent flying around the vehicle in the event of sharp braking, sudden ma-
noeuvres or accident, causing injury.
● While driving, the mobile telephone, other equipment including tele-
phone accessories such as telephone supports, notepads and navigators
must be correctly secured, away from the airbags deployment zones, or
stored in a safe place.
WARNING
When using a mobile telephone or two-way radio without connecting an
external aerial, the maximum permitted levels of electromagnetic radia-
tion in the vehicle may be exceeded, thus putting the driver and the rest
of the vehicle occupants in danger. This is also the case if the aerial has
not been correctly installed.
● A minimum of 20 centimetres should be kept between mobile tele-
phone aerials and artificial pacemakers, as mobile telephones may affect
the working of pacemakers.
● Do not carry a mobile telephone in your breast pocket directly over
the pacemaker when the mobile telephone is switched on.
● Immediately switch off the mobile telephone if you suspect any inter-
ference with pacemakers or other types of medical equipment.


229
Vehicle care and maintenance
SEAT Portable System*
Fig. 125 In the centre
console: Remove the nav-
igator
Fig. 126 Remove the
navigator holder
The SEAT Portable System (supplied by SEAT) allows for the use of other ve-
hicle functions such as additional applications ⇒ 
.The gradient and the angle of vision can be set by moving the navigator to
the required position ⇒ Fig. 125 ⇒ 
.
The Portable Navigation System Instruction Manual can be observed direct-
ly on the equipment.
Functions 1)
● Multifunction display (MFI) shown with additional instruments
⇒ page 17.
● Operation of a factory-fitted radio and a ⇒ Booklet Radio system connec-
ted multimedia player.
● Image display.
● Navigation.
● Hands-free system for mobile telephones via Bluetooth.
● Door open.
● Optical parking system (OPS).
● Recommended gear and driving advice.
Observe the Instruction Manual in the equipment
● Connect the Portable Navigation System.
● Press the button more on the screen.
● Press the Manual button.
● Select the required chapter and press the corresponding button.
Removing and fitting the navigator
● Securely support the navigator.
● Press the release button 1
until the device is released from its holder.
● Take the navigator out and store it safely.
To fit the navigator, place it in the upper support and push the lower part
inside the holder until it engages with a click ⇒ 
.
1)
subject to the vehicle
Vehicle diagramPrior to a journey...While drivingCare, cleaning and mainte-
nanceIf and whenTechnical Data

230Vehicle care and maintenance
Removing and fitting the navigator holder
● Press the holder release button ⇒ Fig. 126 (arrow).
● Remove the holder from the dash panel in an upwards direction.
● If necessary, close the opening with the corresponding cover.
In order to fit the holder, place it on the opening from above and press in a
downwards direction until it engages with a click. ⇒ 
.
WARNING
Any distraction may lead to an accident, with the risk of injury. Operating
the navigator could distract you from the traffic.
● Always stay alert and drive responsibly.
● Select volume settings that allow you to easily hear signals from out-
side the vehicle at all times (e.g. emergency service sirens).
● Setting the volume too high may cause damage to your hearing. This
also applies if the device is set to high volumes for a short period.
WARNING
Journey instructions and traffic signals shown on the navigation system
may differ to the current traffic situation.
● Traffic signals and driving regulations take precedence over journey
instructions and indications from the navigation system.
● Adjust your speed and driving style to visibility, road, traffic and
weather conditions.
WARNING
If the navigator is not securely fastened in position, it could be sent fly-
ing around the vehicle in the event of sharp braking, sudden manoeuvres
or accident, causing injury.
● Fit the navigator housing safely on the corresponding opening on the
dash panel.
● Always place the navigator securely in its holder or store it safely in
the vehicle.
CAUTION
An unsuitable gradient and angle of vision setting can damage the naviga-
tor.
● When adjusting the navigation device, move it with care and not beyond
its limits.
CAUTION
Excessively high or low outside temperatures can affect the Portable Navi-
gation System operation or damage the device.
● Always take the Portable Navigation System with you when you leave the
vehicle to protect it from excessively high or low temperatures and intense
sunlight.
CAUTION
Humidity can damage the Portable Navigation System connections on the
dash panel.
● Do not clean the holder for the navigation device with moist products.
Use a dry cloth.
Note
SEAT recommends taking the Portable Navigation System with you when
you leave the vehicle to prevent it from being stolen. 