ECU Seat Leon 5D 2014 Service Manual

Advice
securely and that the brake system functions
correctly.
The wheel bolts must be clean and turn easi-
ly.
A special adapter is required to turn the anti-
theft wheel bolts* ››› page 218.
Tyre monitoring systems Introduction WARNING
Unsuitable handling of the wheels and tyres
may lead to sudden tyre pressure losses, to
tread separation or even to a blow-out.
● Check tyre pressures regularly and ensure
they are maintained at the pressures indica-
ted. Tyre pressure that is too low could cause
overheating, resulting in tread detachment or
even burst tyres.
● Tyre pressure should be that indicated on
the label when the tyres are cold at all times
››› page 243.
● Re
gularly check the cold inflation pressure
of the tyres. If necessary, change the tyre
pressure of the vehicle tyres while they are
cold.
● Regularly check your tyres for damage and
wear. ●
Never exceed the maximum permitted
speed or loads specified for the type of tyre
fitted on your vehicle. For the sake of the environment
Under-inflated tyres lead to increased fuel
consumption and tyre wear. Note
● Driving for the first time with new tyres at a
high speed can cause them to slightly ex-
pand, which could then produce an air pres-
sure warning.
● Only replace used tyres with those author-
ised by SEAT for the corresponding type vehi-
cle.
● Do not only rely on the tyre monitoring sys-
tem. Regularly check your tyres to ensure
that the tyre pressure is correct and that the
tyres are not damaged due to puncture, cuts,
tears and impacts/dents. Remove objects
from the tyres only when they have not
pierced the tyres. Tyre monitor indicator warning lamp
If a light appears

The pressure in one or more tyres has
clearly reduced in comparison to the
tyre pressure set by the driver or the
tyre has structural damage.
Additionally, an audible warning can be heard and a text
message can be seen on the instrument panel display.
Stop the vehicle!
Reduce speed immediately! Stop
the vehicle safely as soon as possible. Avoid sudden
manoeuvres and braking! Check all tyres and pressures.
Replace any damaged tyres. If flashing

System malfunction
The control lamp flashes for approximately one minute
and then lights up permanently.
If tyre pressure is correct, switch the ignition off and on
again. If the control lamp remains lit up, the tyre moni-
toring indicator can be calibrated. Have the system
checked by a specialised workshop.
Several warning and control lamps light up
for a few seconds when the ignition is switch-
ed on while the function is verified. They will
switch off after a few seconds.
WARNING
When the tyres are inflated at different pres-
sures or at a pressure that is too low then a
tyre may be damaged resulting in a loss of 212

Wheels
Removing the temporary spare wheel
– Lift and hold up the floor panel to remove
the temporary spare wheel ››› Fig. 181 .
– Turn the thumb wheel anti-clockwise.
– Take out the temporary spare wheel.
Chains
For technical reasons, snow chains must not
be used on the temporary spare wheel.
If you have a puncture on one of the front
wheels when using snow chains, fit the tem-
porary spare wheel in place of one of the rear
wheels. Fit the snow chains on the rear wheel
that you have removed and replace the punc-
tured front wheel with this wheel. WARNING
● After fitting the temporary spare wheel,
check the tyre pressures as soon as possible.
Failure to do so may cause an accident. The
tyre pressures are listed on the inside of the
fuel tank flap.
● Do not drive at over 80 km/h (50 mph)
when the temporary spare wheel is fitted on
the vehicle: risk of accident!
● Avoid heavy acceleration, hard braking and
fast cornering: risk of accident!
● Never use more than one temporary spare
wheel at the same time, risk of accident. ●
No other type of tyre (normal summer or
winter tyre) may be fitted on the compact
temporary spare wheel rim.
● If you are driving using the spare wheel,
the ACC system could automatically switch
off during the journey. Switch off the system
when starting off. Extraction of the spare wheel in
vehicles with SEAT SOUND 10
speakers (with
subwoofer)* –
Disassemble the subwoofer's
floor panel
(c
arpet) as follows:
– LEON/LEON SC model: first, pull the carpet
in the direction of the backrest and then
pull it upwards to remove it. LEON ST mod-
el: lift and secure the floor storage com-
par
tment as explained in ››› page 121.
– Disconnect the subwoofer's speaker cable.
– Turn the sec

uring wheel anti-clockwise.
– Remove the subwoofer speaker and the
s

pare wheel.
– When replacing the spare wheel, place the
subwoofer speaker in the direction indica-
ted b

y the arrow and with the word
“FRONT” facing forward.
– Reconnect the speaker cable and firmly ro-
tate the securing wheel clockwise so that the subwoofer system and wheel are firmly
in place.
Winter service Winter tyres –
Winter tyres must be fitted on all four
wheels.
– Only use winter tyres that are approved for
your vehicle.
– Please note that the maximum permissible
speed for winter tyres may be lower than
for summer tyres.
– Also note that winter tyres are no longer ef-
fective when the tread is worn down.
– Af

ter fitting the wheels you must always
check the tyre pressures. The correct tyre
pressures are listed on the sticker on the
inside of the fuel tank flap ›››
page 208.
In winter road conditions winter tyres will
considerably improve vehicle handling. The
design of summer tyres (width, rubber com-
pound, tread pattern) gives less grip on ice
and snow. This applies particularly to vehi-
cles equipped with wide section tyres or with
high speed tyres (code letters H, V or Y on
the sidew

all). »
215
Technical specifications
Advice
Operation
Safety
The essentials

Emergencies
Manual release of the rear lid 3 Applies to the model: LEON ST
Fig. 197
Luggage compartment: access to
manual release. The rear lid can be unlocked manually from
inside in the event of an emergency.
– Remove the lid through the groove with a
screwdriver ››› Fig. 197
A.
– Insert the key into the opening and turn it
in the direction of the arrow until the latch
››› Fig. 197 B
has been released. Manual release of the selector lever
Fig. 198
Selector lever: manual release from
position P. The selector lever can be released manually if
the electrical power supply should fail.
The manual release mechanism is located
under the selector lever console on the right
side. Releasing the selector lever requires a
certain degree of practical skill. We therefore
advise you to obtain professional assistance.
A screwdriver will be needed to carry out the
manual release. Use the flat part of the
screwdriver blade
››› page 220.
Removing the cover from the selector lever
– Apply the handbrake  ››› to ensure that
the car does not move.
– Carefully pull the corners of the selector
lever boot and fold up the selector lever
boot (inside out) by hand. Releasing the selector lever
– Using a screwdriver, press and hold the yel-
low unlocking tab sideways ››› Fig. 198 .
– No w pr

ess the interlock button on the se-
lector lever A and move the selector lever
to position N.
– After carrying out the manual release, at-
tach the selector lever boot on the gearbox
console again.
If the power supply should ever fail (dis-
charged battery, etc.) and the vehicle has to
be pushed or towed, the selector lever must
first be moved to position N. This is possible
after operating the manual release mecha-
nism. WARNING
The selector lever may be moved out of posi-
tion P only when the handbrake is firmly ap-
plied. If this does not work, secure the vehi-
cle with the brake pedal. On a slope the vehi-
cle could otherwise start to move inadver-
tently after shifting the selector lever out of
position P - accident risk! 229
Technical specifications
Advice
Operation
Safety
The essentials

Advice
Removing tail light Fig. 217
Luggage compartment: location of
the bolt securing the tail light unit. Fig. 218
Remove the rear light unit from side
panel. –
Check which of the bulbs is defective.
– Open the rear lid.
– Remove the cover by prying the flat side of
a screwdriver into the recess and remove
the cover from the opening ››› Fig. 217 1 .–
Carefully loosen the screw located behind
the cover with a screwdriver, turning it anti-
clockwise (arrows) ››› Fig. 217 2 .
– Tilt the light in the direction of the arrows
until it comes out (positions 3 and
4 ›››
Fig. 218 ).
– Remo
ve the bulb holder ››› page 238. CAUTION
Take care when removing the rear light unit to
make sure there is no damage to the paint-
work or any of its components. Note
Make sure you have a soft cloth ready to
place under the glass on the rear light unit, to
avoid any scratches. Remove the bulb holder
Fig. 219
Retaining tabs on reverse side of tail
light. –
Remove the bulb holder ››› Fig. 219 unlock-
in g the r

etaining tabs 1 .
– Raise the bulb holder.
– Change the defective bulb.
– To refit follow the steps in reverse order,
taking special care when fitting the bulb
holder. And especially that all retaining
tabs are properly secured.
– Place the light back into place and tighten
with a screwdriver. Note
In the case of LED lights, change only the turn
signal bulb. 238

Index
Index
A
ABS see Anti-lock brake system . . . . . . . . . . . . . . . 143
A C
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
radar sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Acoustic parking aid . . . . . . . . . . . . . . . . . . . . . . 173
Adaptive cruise control control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
messages on the display . . . . . . . . . . . . . . . . . 152
radar sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
special driving situations . . . . . . . . . . . . . . . . . 159
warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Adaptive Cruise Control . . . . . . . . . . . . . . . . . . . . 151 deactivating temporarily . . . . . . . . . . . . . . . . . 158
operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Additional electrical appliances (efficiency pro- gramme) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Adjusting front head restraints . . . . . . . . . . . . . . . . . . . . . 107
front seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
rear head restraints . . . . . . . . . . . . . . . . . . . . . 107
Adjusting the head restraints Front head restraints . . . . . . . . . . . . . . . . . . . . 107
Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Airbags description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Differences between front passenger front air-bag systems . . . . . . . . . . . . . . . . . . . . . . . . . . 51
disabling the front airbag . . . . . . . . . . . . . . . . . 54 front airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
functioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
head-protection airbags . . . . . . . . . . . . . . . . . . 53
Knee airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
side airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Air conditioning . . . . . . . . . . . . . . . . . . . . . . . . 26, 28
Air pressure (tyres) . . . . . . . . . . . . . . . . . . . . . . . . 208
Alarm system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Alcantara: cleaning . . . . . . . . . . . . . . . . . . . . . . . 189
All-wheel drive Snow chains . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Winter tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Ambient lighting . . . . . . . . . . . . . . . . . . . . . . . . . 101
Anti-dazzle interior mirror . . . . . . . . . . . . . . . . . . 104
Anti-dazzle rear vision mirror . . . . . . . . . . . . . . . . 104
Anti-lock brake system . . . . . . . . . . . . . . . . . . . . . 143
Anti-puncture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Anti-puncture kit . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . . . . 82, 87 see also Anti-theft alarm system . . . . . . . . . . . . 82
Anti-theft

alarm system
Interior monitoring . . . . . . . . . . . . . . . . . . . . . . . 89
Tow-away protection . . . . . . . . . . . . . . . . . . . . . . 89
Anti-theft security system . . . . . . . . . . . 82, 85, 227
Anti-theft wheel bolts . . . . . . . . . . . . . . . . . . . . . 218
Anti-trap function Sliding panoramic sunroof . . . . . . . . . . . . . . . . 93
sun blind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Anti-trap function sliding Anti-trap function . . . . . . . . . . . . . . . . . . . . . . . . 93
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Aspects to take into account before starting the vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
ASR see Traction control system . . . . . . . . . . . . . . . 143
As s

istance systems . . . . . . . . . . . . . . . . . . . . . . . 150
ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
adaptive cruise control . . . . . . . . . . . . . . . . . . . 151 Cruise control . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Assisted starting . . . . . . . . . . . . . . . . . . . . . . . . . 223
Assist systems Tyre monitoring indicator . . . . . . . . . . . . . . . . . 213
Audible warnings Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Audible warning signal . . . . . . . . . . . . . . . . . . . . . 43
Auto Lock (central locking) . . . . . . . . . . . . . . . . . . 82
Automatic car washes see Washing . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Aut om

atic dipped beam control . . . . . . . . . . . . . . 96
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . . 132 Backup programme . . . . . . . . . . . . . . . . . . . . . 139
Downhill speed control . . . . . . . . . . . . . . . . . . 138
Driving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Kick-down feature . . . . . . . . . . . . . . . . . . . . . . . 137
Launch Control Programme . . . . . . . . . . . . . . . 137
Manual release of selector lever . . . . . . . . . . . 229
Safety interlock for ignition key . . . . . . . . . . . . 129
Selector lever lock . . . . . . . . . . . . . . . . . . . . . . 134
Selector lever positions . . . . . . . . . . . . . . . . . . 133
Steering wheel with gearshift paddles . . . . . . 135
tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . 132, 135
Automatic gear change . . . . . . . . . . . . . . . . . . . . . 25
B Balanced (wheels) . . . . . . . . . . . . . . . . . . . . . . . . 208
Ball coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . 33, 86, 205 Assisted starting . . . . . . . . . . . . . . . . . . . . . . . . 223
Charge Level . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Disconnecting/Connecting . . . . . . . . . . . . . . . 205
Power Management . . . . . . . . . . . . . . . . . . . . . 191
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Winter conditions . . . . . . . . . . . . . . . . . . . . . . . 205
269

Index
Rev counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66, 67
Reverse gear (automatic gearbox) . . . . . . . . . . . 133
RME (fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Roll-back function Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Roof carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Roof carrier system . . . . . . . . . . . . . . . . . . . . . . . . 122
Roof load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 technical data . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Running in New brake pads . . . . . . . . . . . . . . . . . . . . . . . . 146
New engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
New tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
S Safe driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Safelock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 see also Anti-theft security system . . . . . . . . . . 82
Saf ety
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Safety equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Safety instructions head-protection airbags . . . . . . . . . . . . . . . . . . 53
side airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
using child seats . . . . . . . . . . . . . . . . . . . . . . . . 57
Safety interlock for ignition key . . . . . . . . . . . . . . 129
Safety notes Seat belt tensioners . . . . . . . . . . . . . . . . . . . . . . 47
Using seat belts . . . . . . . . . . . . . . . . . . . . . . . . . 44
Saving fuel Conscientious driving . . . . . . . . . . . . . . . . . . . . 142
Inertia mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Saving tips (efficiency programme) . . . . . . . . . . . 78
Seat adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Seat belt
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Seat belt control lamp . . . . . . . . . . . . . . . . . . . . . . 43
Seat belt position for pregnant women . . . . . . . . . . . . . . . . . . . . . . 46
seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Seat belt protection . . . . . . . . . . . . . . . . . . . . . . . . 44
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
unfastened . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Seat belt tensioners . . . . . . . . . . . . . . . . . . . . . . . . 47
SEAT Drive Profile . . . . . . . . . . . . . . . . . . . . . . . . . 169
Seats adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
rear seat backrest . . . . . . . . . . . . . . . . . . . . . . . 110
Selective unlocking system . . . . . . . . . . . . . . . . . . 84
Selector lever Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . 133
Selector lever (automatic gearbox) Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Manual release . . . . . . . . . . . . . . . . . . . . . . . . . 229
Service interval display . . . . . . . . . . . . . . . . . . . . . 80
Service intervals . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Service notification: read . . . . . . . . . . . . . . . . . . . . 80
Setting Headlight range . . . . . . . . . . . . . . . . . . . . . . . . 100
Side airbags description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
safety instructions . . . . . . . . . . . . . . . . . . . . . . . 53
Side light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Sitting position driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Sitting position for vehicle occupants . . . . . . . . . 38 Sliding/tilting sunroof
Convenience opening/closing . . . . . . . . . . . . . . 91
Smell of gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Snow chains . . . . . . . . . . . . . . . . . . . . . . . . 216, 243 All-wheel drive . . . . . . . . . . . . . . . . . . . . . . . . . 191
Spanner symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Spare wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Special features Windscreen wipers . . . . . . . . . . . . . . . . . . . . . . 102
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Speed warning function . . . . . . . . . . . . . . . . . . . . . 79
Sport Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Start-Stop system . . . . . . . . . . . . . . . . . . . . . . . . . 148 Driver messages . . . . . . . . . . . . . . . . . . . . . . . . 150
Stop/Start the engine . . . . . . . . . . . . . . . . . . . 148
Switching on/off . . . . . . . . . . . . . . . . . . . . . . . . 149
The engine does not switch off . . . . . . . . . . . . 149
The engine starts by itself . . . . . . . . . . . . . . . . 149
Warning lamps . . . . . . . . . . . . . . . . . . . . . . . . . 148
Starting the vehicle . . . . . . . . . . . . . . . . . . . . . . . . 14
Starting (engine) . . . . . . . . . . . . . . . . . . . . . . . . . 129
Steering Electro-mechanical steering . . . . . . . . . . . . . . 190
Engage the steering lock (ignition key) . . . . . 130
Locking the steering (ignition key) . . . . . . . . . 129
Steering wheel Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Gearshift paddles (automatic gearbox) . . . . . 135
Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Storage area front seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Storage compartment . . . . . . . . . . . . . . . . . . . . . 112
Storage compartments . . . . . . . . . . . . . . . . . . . . 111 Glove compartment lighting . . . . . . . . . . . . . . 101
Storing the rear shelf . . . . . . . . . . . . . . . . . . . . . . 116
Sun blind . . . . . . . . . . . . . . . . . . . . . . . . . . . 93, 102 Anti-trap function . . . . . . . . . . . . . . . . . . . . . . . . 93
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