ignition Seat Mii 2014 Service Manual

Driver assistance systems
system is not a replacement for driver aware-
ness.
●
Always adapt your speed and the distance
to the vehicles ahead in line with visibility,
weather conditions, the condition of the road
and the traffic situation.
● The City Safety Assist function does not re-
act to people, animals or vehicles that cross
or move in the opposite direction in the same
lane.
● If after switching on the City Safety Assist
function the vehicle begins to move, slow the
vehicle with the foot brake. CAUTION
If you suspect that the City Safety Assist ra-
dar feature is damaged, switch it off. This will
avoid additional damage.
● Any repair of the radar sensor requires spe-
cialist knowledge. SEAT recommends taking
your car in for technical service. Note
● If the City Safety Assist function activates a
brake, the brake pedal range is reduced. This
makes the brake pedal seem “harder”.
● Automatic brake intervention by the City
Safety Assist function can be cancelled by
pressing the clutch pedal, the accelerator
pedal or by a corrective intervention.
● During automatic braking by the City Safety
Assist function you may hear unusual noises. This is normal and is produced in the brake
system.
Warning and control lamps
The City Safety Assist function is switched on
every time the ignition is switched on. No
special indication is produced.
If the City Safety Assist function is switched
off or on, or if there is an error in the system,
it will be shown by a control lamp on the in-
strument panel display.It lights
upPossible cause
››› Solution  
The City Safety As-
sist function has
been switched on
manually using
the button
 ›››
Fig. 90.
The control lamp
turns off after about
5 seconds.
FlashesPossible cause
››› Solution 
Fast: The City Safe-
ty Assist system
function brakes
automatically or
has braked auto-
matically.
Control lamp turns
off automatically.
FlashesPossible cause
››› Solution 
Slow: City Safety
Assist function is
not currently avail-
able.
If the vehicle is stop-
ped, switch off the
engine and switch it
on again. If necessa-
ry, inspect the radar
sensor (dirt, frost)
›››
in Radar sen-
sor on page 112. If
it still does not func-
tion, refer to a Speci-
alised workshop to
have the system in-
spected. 

Within the operat-
ing area of
5-30 km/h
(3-19 mph): The
City Safety Assist
function has been
switched off man-
ually using the
button
 ››› Fig. 90.
Switch on the City
Safety Assist func-
tion manually using
the button
 ››› Fig. 90. Several warning and control lamps should
light up for a few seconds when the ignition
is switched on, signalling that the function is
being verified. They will switch off after a few
seconds.
»
111
Technical specifications
Advice
Operation
Safety

Driver assistance systems
WARNING
● If you do not start the vehicle immediately
after taking your foot off the brake pedal, the
vehicle may start to roll back under certain
conditions. Depress the brake pedal or use
the hand brake immediately.
● If the engine stalls, depress the brake ped-
al or use the hand brake immediately.
● When following a line of traffic uphill, if you
want to prevent the vehicle from rolling back
accidentally when starting off, hold the brake
pedal down for a few seconds before starting
off. Note
The Official Service or a specialist workshop
can tell you if your vehicle is equipped with
this system. Start-Stop system
Warning lampsIt
lights upPossible causeSolution 
The Start-Stop system
is enabled.
It
lights upPossible causeSolution 
The Start-Stop system
is enabled but the en-
gine cannot be auto-
matically stopped.Contact a special-
ised workshop.

The Start-Stop system
cannot start the en-
gine.Start the engine by
hand using the ve-
hicle's key
››› page 86.
There is a fault in the
alternator.››› page 154
Flash-
esPossible causeSolution 
The Start-Stop system
is not available.Contact a special-
ised workshop.
Some warning and control lamps will light up
briefly when the ignition is switched on to
check certain functions. They will switch off
after a few seconds.
WARNING
Observe the safety warnings ››› in Control
and warning lamps on page 40. Start-Stop system
Fig. 93
At the top of the centre console: Start-
Stop system button With the Start-Stop system enabled, the en-
gine is automatically stopped when the vehi-
cle is at a standstill. It will start again auto-
matically as required.
This function remains enabled while the igni-
tion is switched on. The instrument panel dis-
play shows information on the current status
››› page 115 .
Di s

connect the Start-Stop system by hand
whenever crossing water.
Vehicles with a manual gearbox
● When the vehicle is stopped, put it into
neutral and release the clutch pedal. The en-
gine will stop.
● To restart, simply engage the clutch. »
115
Technical specifications
Advice
Operation
Safety

Advice
metal additives. Using them may damage the
engine!
● Only use fuel with an octane rating that is
in line with the norm EN 228, otherwise sig-
nificant damage could be caused to the en-
gine and fuel system. Furthermore, it could
lead to a loss of performance with the conse-
quent engine fault.
● The use of unsuitable petrol additives could
seriously damage the engine and the catalyt-
ic converter.
● If, in exceptional circumstances, petrol with
a lower octane rating to that recommended is
used, only use moderate engine speeds and a
light throttle. Avoid using full throttle and
overloading the engine. Otherwise engine
damage may occur. Fill up with fuel of a suita-
ble octane rating as soon as possible.
● Just filling one full tank of leaded fuel or
with other metal additives would seriously
impair the efficiency of the catalytic convert-
er and could damage it. Natural gas
Natural gas, in addition to others, can be in
liquid form.
Liquefied natural gas (LNG) is the result of
heavy cooling of natural gas. Therefore its
volume is considerably reduced compared
with compressed natural gas (CNG). In vehi-
cles with a natural gas engine, liquefied nat-
ural gas cannot be directly refilled, as the gas would expand excessively in the vehicle gas
tank.
Therefore, vehicles with a natural gas engine
must only be refuelled using compressed
natural gas
››› .
Natural gas quality and consumption
Natural gas is divided into the groups H and
L depending on its quality.
Gas type H has a superior heating power and
inferior nitrogen and carbon dioxide content
than type L. The higher the heating power of
the natural gas, the lower the consumption
will be.
However, the heating power and the propor-
tion of nitrogen and carbon dioxide can fluc-
tuate within the quality groups. Therefore, ve-
hicle consumption can also vary when using
one type of gas only.
The engine management automatically
adapts to the natural gas used according to
its quality. Therefore, different quality gases
can be mixed in the tank, without the need
for comprehensive draining before applying a
different quality gas.
Natural gas and safety
If you can smell gas or suspect that there is a
leak ››› :
● Stop the vehicle immediately. ●
Switch the ignition off.
● Open the doors to appropriately ventilate
the vehicle.
● Immediately extinguish cigarettes.
● Move away from the vehicle or switch off
objects that may cause sparks or a fire.
● If you continue to smell gas, do not contin-
ue driving!
● Seek specialist assistance. Have the fault
repaired. WARNING
Failure to act when you can smell gas in the
vehicle or when refuelling can cause serious
injuries.
● Carry out the necessary operations.
● Leave the danger zone.
● If necessary, warn the emergency services. WARNING
The vehicle is not prepared to use liquefied
natural gas (LNG) and this fuel must not be
added under any circumstances. Liquefied
natural gas can cause the natural gas tank to
explode, resulting in serious injury. Note
The natural gas system must be subject to
regular inspections at a specialised work-
shop in accordance with the Maintenance
Programme. 138

Checking and refilling levels
Filling the tank Introduction The fuel tank flap is on the rear right of the
vehicle.
WARNING
Refuelling or handling fuel carelessly can
cause an explosion or fire resulting in serious
burns and injuries.
● Always make sure that you correctly close
the fuel cap to avoid evaporation and fuel
spillage.
● Fuels are highly explosive and inflammable
substances that can cause serious burns and
injuries.
● Fuel could leak out or be spilt if the engine
is not switched off or if the filler fuel nozzle is
not fully inserted into the tank filler neck
when refuelling. This could lead to a fire, ex-
plosion and severe injuries.
● When refuelling, turn off the engine and
turn off the ignition for safety reasons.
● Always turn off mobile telephones, radio
apparatus and other radio wave emitting
equipment before refuelling. Electromagnetic
waves could cause sparks and lead to a fire.
● Never enter the vehicle while refuelling. If it
is absolutely necessary to enter, close the
door and touch a metal surface before touch- ing the filler nozzle again. This will prevent
the generation of static electricity. Sparks
could cause a fire when refuelling.
●
Never handle fuel close to flames, sparks or
objects with slow combustion (e.g. ciga-
rettes).
● Avoid static electricity and electro-magnet-
ic radiation when refuelling.
● Observe the safety regulations of the serv-
ice station.
● Never spill fuel on the vehicle or in the lug-
gage compartment. WARNING
For safety reasons, SEAT does not recommend
carrying a spare fuel canister in the vehicle.
Fuel could be spilled and catch fire, above all
in case of an accident and this applies to a
full container as well as empty containers.
This could lead to explosions, fires and inju-
ries.
● Observe the following if you exceptionally
have to carry fuel in a canister:
–Never place a fuel container, to fill it, in-
side the vehicle or on the vehicle, for ex-
ample, in the luggage compartment. Fill-
ing in these circumstances could create
an electrostatic charge and spark that
could ignite fuel fumes.
– Always place the canister on the ground
to fill it. –
Insert the fuel nozzle into the neck of the
canister as far as possible.
– If you are using a metal fuel canister, the
nozzle must always touch the canister
while it is being filled to avoid static elec-
tricity.
– Follow the legal requirements for the use,
storage and transport of spare fuel canis- ters.
– Insure that the fuel container complies
with manufacturing standards, for exam-
ple, ANSI or ASTM F852-86. CAUTION
● Always remove any fuel spilled anywhere
on the vehicle to avoid damage to the wheel
housing, the tyre and vehicle paintwork.
● Refuelling a petrol engine with diesel can
cause serious engine and fuel system dam-
age; the resulting malfunctions are not cov-
ered by the SEAT warranty. If you refuel with
the wrong type of fuel, never start the engine.
This applies to even the smallest amount of
the wrong fuel. Seek specialist assistance.
With the engine running, the composition of
the wrong fuel could significantly damage the
fuel system and the engine itself. For the sake of the environment
Fuels can contaminate the environment. Col-
lect any spilt service fluids and allow a pro-
fessional to dispose of them. 139Technical specifications
Advice
Operation
Safety

Checking and refilling levelsFlashes for about 10
secondsState of the barsPossible cause ››› Solution
and the segments
remaining a)Reserve zone (four small segments)The fuel tank is almost empty.
The reserve tank is being used
››› page 203.Refuel as soon as possible ››› .
–The vehicle is running in natural gas operating mode.–
a)
This only applies to vehicles with the fuel gauge on the dash panel display.
Several warning and control lamps light up
for a few seconds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds.
In natural gas engines
The warning lamp  lights up when both fuel
type

s (petrol and natural gas) have reached
reserve level.
The warning lamp  lights up when the vehi-
cl

e is running in natural gas operating mode.
The warning lamp  switches off when the
natural gas is exhausted. The engine
changes to operate with petrol.
Problem:
if the vehicle is left parked for a
long time just after refuelling, the gas level
indicator does not accurately indicate the
same level shown after refuelling when the
vehicle is started up again. This is not due to
a leak in the system, but to a drop in pres-
sure in the gas tank for technical reasons af- ter a cooling phase immediately after refuel-
ling. WARNING
Driving with insufficient fuel reserve could re-
sult in the vehicle breaking down in traffic
and a serious accident.
● If the fuel level is too low then the fuel sup-
ply to the engine can become irregular espe-
cially on slopes.
● If the engine “is choked” or stalls due to
lack of or irregularity of the fuel supply, the
power steering as well as all of the driver as-
sistance systems including braking assis-
tance will stop working.
● Always refuel when there is only one quar-
ter of the fuel tank left to avoid running out of
fuel. CAUTION
● Always pay attention to any lit control
lamps and to the corresponding descriptions and instructions to avoid damage to the vehi-
cle.
● Never run the fuel tank completely dry. An
irregular fuel supply may lead to ignition
faults and unburnt fuel could enter the ex-
haust system. This could damage the catalyt-
ic converter. Note
The arrow next to the fuel pump symbol on
the instrument panel ››› Fig. 101 indicates the
s ide of

the vehicle on which the tank flap is
located. 141
Technical specifications
Advice
Operation
Safety

Advice
Refuelling with petrol Fig. 103
Open tank flap with tank cap attach-
ed to the holder Before refuelling, always turn off the engine,
the ignition, mobile telephones, auxiliary
heating and keep them off during refuelling.
Opening the fuel tank cap
● The tank flap is at the rear of the vehicle on
the right.
● Pull the rear zone of the fuel tank flap to
open.
● Unfold the key shaft if necessary
››› page 43 .
● Inser
t the vehicle key into the lock cylinder
of the fuel tank plug and turn the key in an
anticlockwise direction.
● Take out the fuel tank plug by turning it in
an anticlockwise direction and rest it on the
upper part of the fuel tank flap ››› Fig. 103. Ref
uelling
The correct petrol type for the vehicle is loca-
ted on a sticker inside the fuel tank flap
››› page 137.
● If the aut

omatic filler nozzle is operated
correctly, it will switch itself off as soon as
the fuel tank is full ››› .
● Do not continue to refuel if it is turned off!
Otherwise, this will fill the expansion cham-
ber and fuel may leak out if the ambient con-
ditions are warm.
Closing the fuel tank cap
● Screw on the fuel tank filler plug in a clock-
wise direction until it is fully inserted with a
click.
● Insert the vehicle key into the lock cylinder
of the fuel tank plug, turn the key in a clock-
wise direction and remove the key.
● Press the tank flap until you hear it click in-
to place. The tank flap must be flush with the
body contour. WARNING
Do not continue refilling once the fuel nozzle
has switched itself off. The fuel tank may be
filled too much. As a result, fuel may spurt
out and spill. This could lead to a fire, explo-
sion and severe injuries. CAUTION
● Always remove any fuel spilled anywhere
on the vehicle to avoid damage to the wheel
housing, the tyre and vehicle paintwork. For the sake of the environment
Fuels can contaminate the environment. Col-
lect any spilt service fluids and allow a pro-
fessional to dispose of them. Refuelling with natural gas
Fig. 104
Tank flap open: gas filler mouth 1 ,
filler mouth retainer 2 Before
refuelling, the engine and the igni-
tion, mo b

ile telephone and heating must be
switched off separately ››› .
It is also essential to carefully read the in-
structions for the natural gas pump.
142

Advice
●
Never work under the vehicle if it has not
been immobilized. If you must work under-
neath the vehicle with the wheels in contact
with the ground then it should be parked on
flat ground, the wheels should be prevented
from moving and the key should be removed
from the ignition.
● If you have to work underneath the vehicle,
you must use suitable stands additionally to
support the vehicle, there is a risk of acci-
dent!. The jack is not intended for this kind of
work and its failure could lead to severe inju-
ries.
● Disconnect the Start-Stop system. WARNING
The engine compartment is a dangerous area
capable of causing serious injury.
● For all type of work, always take the utmost
precautions, work carefully and note the gen-
eral safety standards in force. Never take per-
sonal risks.
● Never work on the engine or in the engine
compartment if you are not familiar with the
necessary operations. If you are not sure
about procedures then visit a specialised
workshop to carry out the necessary work.
Working incorrectly can cause serious inju-
ries.
● Never open the bonnet if you see steam or
coolant escaping from the engine compart-
ment. This may cause serious burns. Always
wait until you cannot see or hear the sound of steam or coolant coming from the engine
compartment.
●
Always allow the engine to cool down be-
fore opening the bonnet.
● Contact with hot elements of the engine
and the exhaust system can cause burns.
● Once the engine has cooled, follow the in-
structions below before opening the bonnet:
– Engage the handbrake and place the gear
selector lever in N or the gear stick in
neutral.
– Remove the key from the ignition.
– Keep children away from the engine com-
partment and never leave them unsuper-
vised.
● When the engine is warm or hot, the cool-
ing system is pressurised. Do not unscrew
the cap on the expansion tank when the en-
gine is hot. Otherwise, coolant may spray out
under pressure causing burns and serious in-
jury.
– After cooling, carefully and slowly un-
screw the cap anticlockwise, gently
pressing down on it.
– Always protect your face, hands and arms
from hot coolant and steam using a large,
thick cloth.
● When refilling liquids, avoid spilling them
on parts of the engine and the exhaust sys-
tem. Spilled liquids could cause a fire. WARNING
The high voltages of the electrical system can
give electric shocks as well as causing burns
and serious injury and possibly even death!
● Never cause short circuits in the electrical
system. The battery could explode.
● To minimise the risk of electric shock and
serious consequences while the engine is
running or starting the engine, note the fol-
lowing:
– Never touch the electrical wiring of the
ignition system. WARNING
In the engine compartment, there are rotat-
ing parts that could cause serious injury.
● Never place your hands directly on or near
the radiator fan. Touching the rotor blades
could seriously harm you. The ventilator
works according to the engine temperature
and could start suddenly even when the igni-
tion is turned off and the key is removed.
● If any work has to be performed when the
engine is started or with the engine running,
there is an additional, potentially fatal, safety
risk from rotating parts, such as the drive
belts, alternator, radiator fan, etc., as well as
from the high-voltage ignition system. Al-
ways work with the utmost caution.
– Always make sure that no parts of your
body, jewellery, ties, loose clothing and
long hair can be trapped by the rotating 144

Advice
Engine coolant Introduction WARNING
Engine coolant is toxic!
● Only keep engine coolant in its original
container, tightly shut and in a safe place.
● Never store engine coolant in empty food
containers or bottles as other people may ac-
cidentally drink it.
● Always keep engine coolant out of reach of
children.
● Ensure that the proportion of engine cool-
ant additive corresponds to the lowest out-
side temperature to which the vehicle will be
exposed.
● If the outside temperature is extremely low,
the engine coolant could freeze causing the
vehicle to stop. As this would also cause the
heating to stop working, vehicle occupants
without warm clothing could freeze. For the sake of the environment
Coolants and additives can contaminate the
environment. Collect any spilt fluids in suita-
ble containers and dispose of them in accord-
ance with legislation and with the utmost re-
spect for the environment. Coolant warning lamp
Several warning and control lamps light up
for a few seconds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds.It lights
upPossible
causeSolution 
Excessive en-
gine coolant
temperature.  Stop the vehicle!
Stop the vehicle safely as
soon as possible. Switch
off the engine and let it
cool.
Insufficient en-
gine coolant
level. 
¡Stop the vehicle!
Check the engine coolant
when the engine has
cooled and, if it is low, re-
fill with engine coolant
››› page 151.
Engine coolant
system faulty.  Do not drive any fur-
ther.
Obtain professional as-
sistance.
FlashesPossible
causeSolution 
Engine coolant
system faulty.Seek specialist assis-
tance. WARNING
Observe the safety warnings ››› in Control
and warning lamps on page 40. Note
On the display of the Portable Navigation
System (supplied by SEAT) ››› page 123 an en-
gine coolant temperature gauge can be seen. Engine coolant specifications
The engine cooling system is supplied from
the factory with a specially treated mixture of
water and, at least, 40 % of the additive
G 13
(TLVW 774 J). The engine coolant additive is
recognisable by its purple colour. This mix-
ture of water and additive gives the necessa-
ry frost protection down to -25°C (-13 F) and
protects the light alloy parts of the cooling
system against corrosion. It also prevents
scaling and considerably raises the boiling
point of the coolant.
To protect the engine cooling system, the
percentage of additive must always be at
l e

ast 40 %, even in warm climates where an-
ti-freeze protection is not required.
If greater frost protection is required in very
cold climates, the proportion of additive can
be increased. However, the percentage of ad-
ditive should not exceed 60%, as this would
150

Checking and refilling levels
Never work on the electrical system without
fully understanding the operations required,
the applicable safety standards and without
the correct tools ››› ! If required, have any
work carried out by a specialised workshop.
SEAT recommends taking your car in for tech-
nical service. Negligent work can cause seri-
ous injury.
Location of the vehicle battery
The battery is located in the engine compart-
ment.
Explanation of the warning indications on
the vehicle's batterySymbolMeaning 
Wear eye protection!

Battery acid is very corrosive and caustic.
Always wear protective gloves and eye
protection!

Fires, sparks, open flames and smoking
are prohibited.

A highly explosive mixture of gases is re-
leased when the battery is under charge.

Keep children away from acid and batter-
ies!
WARNING
Working on the vehicle battery and the elec-
trical system can cause corrosion, fire and electric shocks. Always read and take into ac-
count the following warnings and safety
standards before carrying out any work:
●
Before working on the battery, switch off
the engine, the ignition and all electrical de-
vices then disconnect the negative connec-
tion on the battery.
● Keep children away from acid and the bat-
tery itself!
● Wear eye protection.
● Battery acid is very corrosive and caustic. It
can burn skin and cause blindness. When
handling the battery, protect yourself from
splashes of acids, above all your hands, arms
and face.
● Do not smoke and never work close to pla-
ces exposed to flames or sparks.
● Avoid sparks and electrostatic discharges
when working with cables and electrical devi-
ces.
● Never short the battery terminals.
● Never use a damaged battery. It can ex-
plode. Replace a damaged battery immedi-
ately.
● Replaced damaged or frozen batteries as
soon as possible. A flat battery can also
freeze at temperatures close to 0 °C (+32 °F). CAUTION
● Never disconnect the battery if the ignition
is switched on or if the engine is running. This could damage the electrical system or
electronic components.
● Do not expose the battery to direct sunlight
over a long period of time, as the intense ul-
traviolet radiation can damage the battery
housing.
● If the car is left standing for long periods,
protect the battery from extreme cold temper-
ature so that it does not “freeze up” and be-
come damaged. Warning lamp
It
lights upPossible
causeSolution 
Faulty generator.
Contact a specialised
workshop. Have the elec-
trical system checked.
Disconnect any unneces-
sary electrical devices.
The generator does not
charge the battery while
the vehicle is in motion.
Several warning and control lamps light up
for a few seconds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds.
»
155
Technical specifications
Advice
Operation
Safety

Checking and refilling levels
recommends you have the battery replaced
by a technical service.
Use only maintenance-free genuine batteries
conforming to TL 825 06 and VW 7 50 73
Standards. These standards must be dated
April 2008 or later.
Vehicles fitted with the Start-Stop system are
equipped with a special battery. Therefore,
this battery must only be replaced by another
with the same specifications.
Disconnecting the vehicle's battery
If you must disconnect the battery from the
electrical system, please note the following:
● Switch off the ignition and all electrical
equipment.
● The vehicle must be unlocked before dis-
connecting the battery, otherwise the alarm
will be triggered.
● First disconnect the negative cable and
then the positive ››› .
Connecting the vehicle's battery
● Before reconnecting the battery, switch off
the engine and all electrical devices.
● First reconnect the positive cable and then
the negative ››› .
Different control lamps may light up after
connecting the battery and switching the ig-
nition on. They will be turned off after a short trip at a speed of between 15-20 km/h
(10-12 mph). If the warning indicators remain
lit, please visit a specialised workshop to
have the vehicle checked.
If the battery has been disconnected for a
long time, it is possible that the next service
date is not displayed or calculated correctly
››› page 36 . Respect the maximum service in-
t er
vals permitted ››› Booklet Maintenance
Programme.
Autom

atic device disconnection
The intelligent vehicle electrical system auto-
matically implements a range of measures to
prevent the battery from discharging when
high demands are made on it:
● The idling speed is increased so that the al-
ternator provides more electricity.
● Where necessary, the power to the most
powerful devices is reduced or even com-
pletely disconnected.
● On starting the engine, the power supply
from the 12-volt power sockets and the ciga-
rette lighter may be interrupted for a short
time.
The on-board management program cannot
always prevent the battery from running flat.
For example, if the ignition is left on for a
long period with the engine off or if the side
lights or parking lights are left on while the
vehicle is stationary. Why the battery runs flat:
●
When stationary for a long time without
starting the engine, particularly if the ignition
is switched on.
● Use of electrical devices with the engine
switched off. WARNING
Incorrectly securing the battery or using the
wrong battery can cause short-circuits, fire
and serious injuries.
● Always use only maintenance-free batter-
ies, protected to prevent a leak, and whose
properties, specifications and size corre-
spond to the standard battery. WARNING
A highly explosive mixture of gases is re-
leased when the battery is under charge.
● The batteries should be charged in a well-
ventilated room only.
● Never charge a frozen or recently thawed
battery. A flat battery can also freeze at tem-
peratures close to 0 °C (+32 °F).
● Always replace a battery which has frozen.
● Battery cables not correctly connected may
cause a short circuit. Reconnect first the posi-
tive cable and then the negative cable. » 157
Technical specifications
Advice
Operation
Safety