ECU Seat Alhambra 2012 Service Manual

239
Trailer towing
The warning lamp
● When the indicator flashes, the tow ball is not in its final position, has
not engaged or is damaged ⇒ 
.
● When the indicator remains lit and the tailgate is open, the tow ball has
inserted correctly into the folded or deployed position.
● When the tailgate is closed, the indicator is turned off.
WARNING
The incorrect use of the tow hitch can cause accidents and injury.
● Ensure that no person, animal or object gets in the way of the tow
ball.
● Never push the button when there is a trailer hitched or when any
kind of carrier or accessory is fitted to the tow hitch ball.
● While the ball is moving, do not interfere with any tool.
● Do not drive with a trailer if the indicator does not light.
● If there is a fault in the electric system or the trailer tow hitch, visit a
specialised workshop to have it checked.
● If the diameter of the tow hitch is less than 49 mm, never use this for
a trailer.
CAUTION
● If anything is attached to the tow hitch ball, do not, under any circum-
stances press the button.
● Never direct a high-pressure or steam cleaning system directly at the
tow hitch ball or trailer power socket. This could cause damage to seals or
remove lubricating grease.
Note
In extremely low temperatures, it is possible that the tow hitch is not re-
leased. In this case, place the vehicle in a warmer location (for example, a
garage). Installing a bicycle carrier to the tow hitch
The maximum load permitted for a bicycle carrier on the tow hitch ball is
75 kg, with a maximum distance of 300 mm from the support. The distance
between supports is the distance between the bicycle carrier centre of gravi-
ty (with the bicycles) and the centre of point of the tow hitch ball.
WARNING
The incorrect use of the tow hitch with a bicycle carrier installed can
cause accidents and injury.
● Never exceed the load and distances between supports indicated.
● Never fit the bicycle carrier to the tow hitch ball neck, underneath the
tow hitch given that the bicycle carrier may be incorrectly fitted due to
the shape of the tow hitch and the model of bicycle carrier.
● Always read and take the manufacturer assembly instructions into ac-
count.
CAUTION
Exceeding the maximum load and distance between supports indicated can
cause considerable damage to the vehicle.
● Never exceed the specifications. 
Hitching and connecting the trailer
Trailer cable
Always secure the trailer cable to the towing vehicle correctly. Leave a little
bit of slack in the cable for turning. However, ensure that the cable does not
rub off the ground while driving. 
Safety FirstOperating instructionsPractical tipsTechnical Specifications

241
Trailer towing
For the sake of road safety, SEAT recommends using the maximum allowed
drawbar load. The handling of the combined vehicle and trailer will be poor
if the drawbar load is too low.
The drawbar load increases the weight on the rear axle, reducing the vehicle
carrying capacity.
Gross combination weight
This figure refers to the combined weight of the loaded vehicle and loaded
trailer.
Loading the trailer
The combined vehicle and trailer must be balanced. Use the maximum
drawbar load authorised and do not overload the front or the rear of the
trailer:
● Distribute loads in the trailer so that heavy objects are as near to the
axle as possible or even above it.
● Correctly secure the trailer load.
Tyre pressure
Inflate the trailer tyres according to the manufacturer's instructions.
Inflate the towing vehicles tyres to the maximum ⇒ page 297.
WARNING
Exceeding the maximum authorised axle load, drawbar load or the gross
combination weight of the towing vehicle and trailer could cause a seri-
ous accident with severe consequences.
● Never exceed the specifications.
● With the actual load on the front and rear axles, the maximum axle
load should never be exceeded. The weight on the front and rear should
never exceed the gross vehicle weight.
WARNING
If the load moves, the stability and safety of the vehicle and trailer com-
bination will be seriously affected and this could result in a serious acci-
dent.
● Always correctly load the trailer.
● Always secure loads correctly with suitable and undamaged attach-
ment rope or straps.

Driving with a trailer
Adjusting the headlights
When towing a trailer, the front of the vehicle may rise and so the dipped
beam headlights may blind other drivers. Use the headlight range control to
lower the cone of light. If you do not have headlight range control, have the
headlights adjusted by a qualified dealership. Vehicles with high-intensity
discharge lamps adapt automatically and do not require adjustment.
Details of driving with a trailer
● If the trailer has an overrun brake, apply the brakes gently at first and
then, firmly. This will prevent the jerking that can be caused by the trailer
wheels locking.
● As of the combined vehicle and trailer mass, braking distances will be
greater.
● Select a low gear before driving down a steep hill to use the engine
braking effect to slow down the vehicle. Otherwise, the braking system
could overheat and fail. 
Safety FirstOperating instructionsPractical tipsTechnical Specifications

264Accessories, parts replacement and modifications
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 qualified dealer if you wish to use a two-way radio with a
transmitting power of over 10 watts. The qualified workshops are familiar
with the technical options for installation. SEAT recommends visiting a Tech-
nical 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 radius of action of the airbags, 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. 

265
Accessories, parts replacement and modifications
In vehicles equipped with an emergency call function via the mobile phone
or other appliances connected in the vehicle, it is possible to send the vehi-
cle position. If the control unit records an accident with airbag activation,
the system may automatically send a signal. This will depend on the net-
work 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 this is the case, the information and descriptions given in the in-
structions manual will not match the original functions. Therefore, SEAT rec-
ommends that any modifications are recorded in the section “Other work-
shop notes” in the Maintenance Programme.
The Technical 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's side footwell area, next to the
lever for opening the bonnet, below a cover.
The fault memory should only be read and reset by a Technical Service.

Using a mobile telephone in a vehicle without connection
to an exterior aerial
Mobile telephones transmit and receive radio waves, both when in use and
when on stand-by. Scientific studies state that radio waves exceeding cer-
tain values may be harmful to the human 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 conclu-
sive scientific evidence that cordless phones are completely safe.
Therefore, some experts recommend that use of mobile phone be kept to a
minimum until the results of current research are published.
When a mobile phone 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, it will comply with
the legislation in many countries which only permits the use of mobile
phones inside vehicles using a hands-free device.
The hands-free system mounted at the factory has been designed for use
with conventional mobile phones and phones with Bluetooth technology.
Mobile phones should be placed on a suitable phone cradle. In addition,
the cradle should always be correctly fitted into the base plate. This ensures
that the mobile phone is securely fastened to the instrument panel and con-
nected to the exterior aerial of the vehicle.
If the mobile phone is connected to an aerial incorporated into the vehicle
or an exterior aerial connected to the vehicle, this will help to reduce the 
Safety FirstOperating instructionsPractical tipsTechnical Specifications

266Accessories, parts replacement and modifications
electromagnetic radiation transmitted and the risk to human health. It will
also improve the quality of the connection.
If the phone is used inside the vehicle without the hands-free system, it will
not be securely fastened and will not be connected to the exterior aerial of
the vehicle telephone. Nor will the telephone charge if it is not on the sup-
port. In addition, some calls may break off and the quality of the connection
will be affected.
Mobile phones should only be used inside the vehicle if they are connected
to a hands-free system with an exterior aerial.
WARNING
If the mobile phone 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, mobile phones must be securely fastened in position,
outside the radius of action of the airbags, or safely stowed away.
WARNING
When using a mobile phone 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.
● A minimum of 20 centimetres should be kept between mobile phone
aerials and artificial pacemakers, as mobile telephones may affect the
working of pacemakers.
● Do not carry a mobile phone in your breast pocket directly over the
pacemaker when the phone is switched on.
● If you suspect interference, switch the mobile phone off immediately.
 Jacking points for raising vehicle
Fig. 162 Front jacking
points for raising vehicle
with lifting platform or
jack.
Fig. 163 Rear jacking
points for raising vehicle
with lifting platform or
jack.
Always use the jacking points indicated in the figures ⇒ fig. 162 and
⇒ fig. 163 when raising the vehicle. If the vehicle is not lifted at these
points, it could be seriously damaged ⇒ 
or lead to serious injury ⇒ .

279
Checking and refilling levels
Working in the engine compartment Introduction
Before working in the engine compartment, make sure that the vehicle is
parked on horizontal and firm ground.
The engine compartment of the vehicle is a hazardous area. Never work on
the engine or in the engine compartment if you are not familiar with the op-
erations to be carried out, the applicable safety standards and especially if
you do not have the instruments, liquids and tools necessary ⇒ 
! Have
the work carried out by a specialised workshop if you are uncertain. Negli-
gent work can cause serious injury.
Additional information and warnings:
● Windscreen wash system ⇒ page 105
● Start and stop the engine ⇒ page 172
● Brake fluid ⇒ page 185
● Vehicle battery ⇒ page 292
● Checks when filling up ⇒ page 268
● Engine oil ⇒ page 283
● Engine coolant ⇒ page 287
● Accessories, parts replacement, repairs and modifications ⇒ page 261
WARNING
If the vehicle moves unexpectedly, this could cause serious injury.
● Never work underneath the vehicle if it is not secured against moving.
If you must work underneath 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 must 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 accident!.
The jack is not intended for this kind of work and its failure could lead to
severe injuries.
WARNING
The engine compartment is a dangerous area capable of causing serious
injury.
● For all type of work, always take the utmost precautions, work care-
fully and note the general safety standards in force. Never take personal
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 proce-
dures then visit a Technical Service to carry out the necessary work. In-
correct work can cause serious injuries.
● Never open the bonnet if you see steam or coolant escaping from the
engine compartment. Hot vapours and coolant can 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 before opening the bonnet.
● Contact with hot elements of the engine and the exhaust system can
cause burns. 
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282Checking and refilling levels
Opening and closing the bonnet
Fig. 168 In the footwell
on the driver side: Lever
for unlocking the bonnet.
Fig. 169 Release lever to
open the bonnet in the
radiator grille.
Opening the bonnet
The lever to open the bonnet can only be used if the driver's door is open. ●
Before opening the bonnet, make sure that the windscreen wiper arms
are in place against the windscreen ⇒ 
.
● Open the driver's door.
● Pull the release lever ⇒ fig. 168 in the direction of the arrow. The bonnet
is released from the lock carrier by a spring mechanism ⇒ 
.
● Lift the bonnet using the release lever ⇒ fig. 169 (arrow) and open the
bonnet fully. The bonnet is held open thanks to the gas strut.
Closing the bonnet
● To close the bonnet, pull it down to overcome the gas strut pressure
⇒ 
.
● Allow the bonnet to fall into the lock carrier. Do not press down.
If the bonnet is not correctly closed, open it once again and close it correct-
ly.
The bonnet is correctly closed when it is flush with the corresponding parts
on the bodywork.
WARNING
If the bonnet is not correctly closed, it could suddenly open while driving
leaving the driver without visibility. This could result in serious accident.
● After closing the bonnet, always check that it is properly secured by
the locking mechanism in the lock carrier. The bonnet must be flush with
the surrounding body panels.
● While driving, if you notice that the bonnet is not correctly closed
then stop immediately and close it correctly.
● Only open and close the bonnet when there is nobody within its
range. 

292Checking and refilling levels
Vehicle battery
Introduction
The battery is a component of the vehicle's electrical system.
Never work on the electrical system without fully understanding the opera-
tions required, the applicable safety standards and without the correct tools
⇒ 
! Have the work carried out by a specialised workshop if you are uncer-
tain. SEAT recommends visiting a Technical Service. Negligent work can
cause serious injury.
Location and number of batteries in the vehicle
The battery is located in the engine compartment.
Explanation of the warning indications on the vehicle's battery
SymbolMeaning
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 released when
the battery is under charge.
Keep children away from acid and batteries!
Additional information and warnings:
● ⇒ Booklet Maintenance Programme
● Starter assist systems (Start-Stop function) ⇒ page 196
● Working in the engine compartment ⇒ page 279
● Accessories, parts replacement, repairs and modifications ⇒ page 261
WARNING
Working on the vehicle battery and the electrical system can cause corro-
sion, fire and electric shocks. Always read and take into account the fol-
lowing warnings and safety standards before carrying out any work:
● Before working on the battery, switch off the engine, the ignition and
all electrical devices then disconnect the negative connection on the bat-
tery.
● Keep children away from acid and the battery 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 places exposed to flames or
sparks.
● Avoid sparks and electrostatic discharges when working with cables
and electrical devices.
● Never short the battery terminals.
● Never use a damaged battery. It can explode. Replace a damaged bat-
tery immediately.
● Replaced damaged or frozen batteries as soon as possible. A flat bat-
tery can also freeze at temperatures close to 0 °C (+32 °F).
● For vehicles with the battery in the luggage compartment: Check that
the battery gas ventilation hose is securely attached. 

296Checking and refilling levels
● the idling speed is increased so that the alternator provides more elec-
tricity.
● where necessary, the power of the most powerful consumers is reduced
or even completely disconnected.
● On starting the engine, the power supply from the 12-volt sockets and
the cigarette 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 does the battery run flat?
● When stationary for a long time without starting the engine, particularly
if the ignition is switched on.
● Use of electrical consumers with the engine switched off.
● If the auxiliary heater is running ⇒ page 165.
WARNING
Incorrectly securing the battery or using the wrong battery can cause
short-circuits, fire and serious injuries.
● Always use only maintenance free batteries that do not run flat alone
and whose properties, specifications and size correspond to the stand-
ard battery. The specifications are indicated on the battery case.
WARNING
A highly explosive mixture of gases is released 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 al-
so freeze at temperatures close to 0 °C (+32 °F).
WARNING (Continued)
● Always replace a battery which has frozen.
● Battery cables not correctly connected may cause a short circuit. Re-
connect first the positive cable and then the negative cable.
CAUTION
● Never disconnect the battery if the ignition is switched on or if the en-
gine is running. This could damage the electrical system or electronic com-
ponents.
● Never plug accessories supply current, such as solar panels or a battery
charger, to the 12-volt sockets or the cigarette lighter. This could damage
the vehicle's electrical system.
For the sake of the environment
● Dispose of the battery in an environment-friendly manner. Batteries con-
tain toxic substances such as sulphuric acid and lead.
● Battery acid can contaminate the environment. Collect any spilt service
fluids and allow a dispose of them correctly. 

300Wheels and tyres
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 309.
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 309.
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 Technical Service.
SEAT recommends visiting a Technical Service ⇒ 
.
Wheel rims with bolted trims
Wheel rims 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 Technical Service. SEAT recommends visiting a Technical Service ⇒ 
.
WARNING
The use of worn or damaged wheel rims could make driving more danger-
ous and result in serious accidents and damage.
● Only wheel rims which have been approved for use with your vehicle
should be used.
● Inspect wheel rims regularly for damage and replace as required.
WARNING
If the bolted joints of wheel rims with bolted ring trims are not correctly
tightened or loosened, this could result in serious accident.
● Never loosen the bolted joints of wheel rims with bolted ring trims.
● Any work relating to wheel rims with bolted rims should be carried
out at qualified workshop. SEAT recommends visiting a Technical Service.

Replacement of new tyres and wheel rims
New tyres
● When tyres are new, drive with extreme caution for the first 500 km
(310 miles), as all tyres need to be run-in. Tyres which have not been run-in
do not have such good grip ⇒ 
or braking capacity ⇒ .
● All four wheels must be fitted with radial tyres of the same type, size
(rolling circumference) and the same tread pattern.
● The tread depth of new tyres may vary, according to the type and make
of tyre and the tread pattern.
Replacing tyres
● Where possible, always replace both wheels on an axle (both wheels on
the front axle or both wheels on the rear axle) ⇒ 
.
● Old tyres should only be replaced by SEAT approved tyres for the vehicle
in question, and in accordance with the maximum permitted size, diameter,
load and speed capacity.
● Never use tyres which are larger than SEAT approved tyres. If the tyres
are too big, they may knock or rub against the chassis or other components,
resulting in damage. 