2005 Seat Leon 5D ABS

Cockpit
78Traction control system (TCS)*
The traction control system prevents the driven wheels from
spinning when the vehicle is acceleratingThe warning lamp lights up when the ignition is switched on and should turn
out after about 2 seconds.
When the TCS is operating while drivi ng, the warning lamp flashes. If the
system is deactivated or if there is any fault in the same, the warning lamp will
remain lit.
It will also come on if a fault should occur in the ABS because the TCS oper-
ates in conjunction with the ABS. For further information see ⇒ page 165.Soot accumulation in the diesel engine particle filter*

if the symbol
 lights, soot has built up in the diesel engine particle filter
due to continuous short trips. In this case, drive the vehicle at a constant
speed of at least 60 km/h (with and engine speed of about 1400 rpm) for
about 10 minutes. The increase in temperature generated may burn the accu-
mulated soot in the filter.
If the symbol  is not deactivated, bring the vehicle to a specialized work-
shop to repair the fault.
For more information on the diesel particle filter ⇒page 192.
Alternator

This warning lamp signals a fault in the alternator.The warning lamp
 lights up when the ignition is switched on. It should go
out when the engine has started running.
If the warning lamp  lights up while driving, the alternator is no longer
charging the battery. You should immediately drive to the nearest qualified
workshop.
You should avoid using electrical equipment that is not absolutely necessary
because this will drain the battery.
If the indicator flashes the voltage is insufficient for normal vehicle
operation.
Tyre pressure*

Fig. 47 Centre console:
tyre monitor system
button
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Cockpit79
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
The tyre monitor indicator compares wh
eel revolutions and with this informa-
tion, the diameter of each wheel using the ABS sensors. If the diameter of a
wheel changes, the tyre monitor indicator lights
. The wheel diameter
changes when:
•
Tyre pressure is insufficient.
•
The tyre structure is damaged.
•
The vehicle is unbalanced because of a load.
•
The wheels of one axle are under more pressure (for example, driving with
a trailer or on extreme slopes).
•
The vehicle is fitted with snow chains.
•
The emergency wheel is fitted.
•
The wheel on one axle is changed.
Tyre pressure adjustment
Following the modification to tyre pressure or changing one or more wheels,
the button ⇒ page 78, fig. 47 must be kept pressed while the ignition is on
until an acoustic signal is heard.
If the wheels are under excessive load (for example, driving with a trailer or
heavy load), the tire pressure must be increased to the recommended value
for a full load (see the sticker on the inside of the fuel flap). If the tyre monitor
system button is pressed the new tyre pressures are confirmed.
The tyre pressure monitor indicator
 lights
If the tyre pressure of one wheel is much lower than the value set by the driver
then the indicator lights ⇒.
The tyre pressure monitor indicator  flashes
If the tyre pressure indicator flashes, this indicates a fault. Go to the nearest
specialist workshop.
WARNING
•
When the tyre pressure indicator lights, reduce speed immediately and
avoid any sudden manoeuvre or brakin g. Stop when possible, and check
the tyre pressure and status.
•
The driver is responsible for correct tyre pressure. For this reason, tyre
pressure must be regularly checked.
•
Under certain circumstances (for example, in a sports situation, in
winter conditions or on a dirt track) the tyre monitor indicator may light or
function incorrectly.Note
If the battery is disconnected, the yellow indicator
 lights after turning the
ignition on. This should turn off after a brief trip.
Engine management

This warning lamp monitors the engine management system
for petrol engines.The warning lamp
 (Electronic Power Control) lights up when the ignition
is switched on to show that the lamp is working properly. It should go out
when the engine ha s started running.
If a fault develops in the electronic engine management system while you are
driving, this warning lamp will light up . Take the vehicle to an Authorised
Service Centre as soon as possible and have the engine checked.
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Cockpit
80Glow plug system / Engine fault


The warning lamp lights up to show that the glow plugs are
preheating. The indicator flashes if there is an engine fault.
Warning lamp
 is lit
The warning lamp  lights up while the glow plugs are preheating. When the
warning lamp goes off, the engine should be started straight away.
Warning lamp
 flashes
If a fault develops in the engine management system while you are driving,
the glow plug lamp will flash
. Take the vehicle to an Authorised Service
Centre as soon as possible and have the engine checked.
Emission control system*

This warning lamp monitors the exhaust system.
Warning lamp
 flashes:
When there is misfiring that can damage the catalytic converter. Reduce
speed and drive carefully to the near est qualified workshop to have the
engine checked.
The following information text displa yed in the instrument panel display
14):
EXHAUST GAS SEE WORKSHOP
Warning lamp
 is lit:
If a fault has developed during driving which has reduced the quality of the
exhaust gas (e. g. lambda probe fault). Reduce speed and drive carefully to
the nearest qualified workshop to have the engine checked. The following information text displayed
in the instrument panel display :
EXHAUST GAS SEE WORKSHOP .
Electronic stabilisation programme (ESP)*

This warning lamp monitors the electronic stabilisation
program.
This program includes the ABS, EDL and TCS.
The warning lamp
 has the following functions:
•
It will light for about 2 seconds when the ignition is switched on while a
test of the function is carried out.
•
It flashes when the ESP is activated when driving.
•
It will light up continuously if there is a malfunction in the ESP.
•
It will light up continuously if the ESP is switched off.
•
It will also come on if a fault should occur in the ABS because the ESP
operates in conjunction with the ABS.
If the ESP warning lamp
 lights up and stays on after the engine is started,
this may mean that the control system has temporarily switched off the ESP.
In this case the ESP can be reactivated by switching the ignition off and then
on again. If the warning lamp goes out, this means the system is fully
functional.
Operating the foot brake

The footbrake must be depressed when this warning lamp lights up. This is
necessary when the automatic gearbox* selector lever is moved out of the
positions P or N.
14)Depending on the model version
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Driving147
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
•
Adjust the driver seat or steering wheel so that there is a distance of at
least 25 cm between the steering wheel and your breast bone ⇒page 146,
fig. 110 . If you fail to observe the minimum distance, the airbag will not
protect you. Risk of fatal injury.
•
If your physical constitution prevents you from maintaining the
minimum distance of 25 cm, contact an Authorised Service Centre. The
Authorised Service Centre will help you decide if special specific modifica-
tions are necessary.
•
If you adjust the steering wheel so th at it points towards your face, the
driver airbag will not protect you prop erly in the event of an accident. Make
sure that the steering wheel points towards your chest.
•
When driving, always hold the steering wheel with both hands on the
outside of the ring at the 9 o'clock and 3 o'clock positions. Never hold the
steering wheel at the 12 o'clock position, or in any other manner (e.g. in
the centre of the steering wheel, or on the inside of the rim). In such cases,
you could receive severe injuries to the arms, hands and head.
SafetyElectronic stabilisation programme (ESP)*
ESP helps make driving safer in certain situations.The Electronic Stabilisation Program (ESP ) contains the electronic differential
lock (EDL) and the traction control system (TCS). The ESP function works in
conjunction with the ABS. Both warning la mps will light up if the ESP or ABS
systems are faulty.
The ESP is started automatically when the engine is started.
In specific circumstances where you requ ire less traction, you can switch off
the ESP by pressing button ⇒fig. 111 .
For example:•
When driving with snow chains,
•
when driving in deep snow or on loose surfaces,
WARNING (continued)
Fig. 111 Detail of the
centre console: ESP
button

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Intelligent technology165
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
Tips and MaintenanceIntelligent technologyBrakesBrake servoThe brake servo amplifies the pressure you apply to the brake pedal. It works
only when the engine is running .
If the brake servo is not functioning due to a malfunction, or if the vehicle has
to be towed, you will have to press the brake pedal considerably harder to
make up for the lack of servo assistance.
WARNING
The braking distance can also be affected by external factors.•
Never let the vehicle coast with the engine switched off. Failure to do so
could result in an accident. The braking distance is increased considerably
as the brake servo does not function.
•
If the brake servo is not functioning, for example if the vehicle is being
towed, you will have to press the brake pedal considerably harder than
normal.
Brake assist system (BAS)*In an emergency, most drivers brake in time, but not with maximum force.
This results in unnecessarily long braking distances. The brake assist system intervenes here, if you press the brake pedal very
quickly, the brake assist system registers an emergency situation. It then very
quickly builds up the full brake pressure so that the ABS can be activated
more quickly and efficiently, thus reducing the braking distance.
Do not reduce the pressure on the br
ake pedal. The brake assist system
switches off automatically as soon as you release the brake.
WARNING
•
The risk of accident is higher if yo u drive too fast, if you do not keep
your distance to the vehicle in front, and when the road surface is slippery
or wet. The increased accident risk cannot be reduced by the brake assist
system.
•
The brake assist system cannot defy the laws of physics. Slippery and
wet roads are dangerous even with the brake assist system! Therefore, it is
essential that you adjust your speed to suit the road and traffic conditions.
Do not let the extra safety features tempt you into taking any risks when
driving.
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Intelligent technology
166Anti-lock brake system and traction control
M-ABS (ABS and TCS)Anti-lock brake system (ABS)
The anti-lock brake system prevents the wheels locking
during braking.The anti-lock brake system (ABS) is an important part of the vehicle's active
safety system.
How the ABS works
If one of the wheels is turns too slowly in relation to the road speed, and is
close to locking, the system will reduce the braking pressure for this wheel.
The driver is made aware of this control process by a pulsating of the brake
pedal and audible noise. This is a deliberate warning to the driver that one or
more of the wheels is tending to lock and the ABS control function has inter-
vened. In this situation it is important to keep the brake pedal fully depressed
so the ABS can regulate the brake application. Do not “pump”.
If you brake hard on a slippery road surface, the best possible control is
retained as the wheels do not lock.
However, ABS will not necessarily guarantee shorter braking distances in all
conditions. The braking distance could even be longer if you brake on gravel
or on fresh snow covering a slippery surface.
WARNING
•
The anti-lock brake system cannot defy the laws of physics. Slippery
and wet roads are dangerous even with ABS! If you notice that the ABS is
working (to counteract locked wheels under braking), you should reduce
speed immediately to suit the road and traffic conditions. Do not let the
extra safety features tempt you into taking any risks when driving.
•
The effectiveness of ABS is also determined by the tyres fitted
⇒ page 209.
•
If the running gear or brakes are mo dified, the effectiveness of the ABS
could be severely limited.
Traction control system (TCS)
The traction control system prevents the drive wheels from
spinning when the car is accelerating.Description and operation of the traction control system during acceleration
(TCS)
TCS reduces engine power to help prevent the drive wheels of front-wheel
drive vehicles losing traction during acceleration. The system works in the
entire speed range in conjunction with ABS. If a malfunction should occur in
the ABS, the TCS will also be out of action.
TCS helps the vehicle to start moving, accelerate and climb a gradient in slip-
pery conditions where this may otherwise be difficult or even impossible.
The TCS is switched on automatically when the engine is started. If necessary,
it may be turned on or off pushing the button on the centre console.
When the TCS is off, the warning lamp is lit. The TCS should normally be left
switched on at all times. Only in exceptional circumstances, when slipping of
the wheels is required, should it be disconnected for example•
With compact temporary spare wheel.
•
When using the snow chains.
•
When driving in deep snow or on loose surfaces
•
When the vehicle is bogged-down, to free it by “rocking.”WARNING (continued)
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Intelligent technology167
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
The TCS should be switched on again afterwards as soon as possible.
WARNING
•
It must be remembered that TCS cann
ot defy the laws of physics. This
should be kept in mind, particular ly on slippery and wet roads and when
towing a trailer.
•
Always adapt your driving style to suit the condition of the roads and
the traffic situation. Do not let the extra safety afforded by TCS tempt you
into taking any risks when driving, this can cause accidents.Caution
•
In order to ensure that TCS function correctly, all four wheels must be
fitted with the same tyres. Any differences in the rolling radius of the tyres can
cause the system to reduce engine power when this is not desired.
•
Modifications to the vehicle (e.g. to the engine, the brake system, running
gear or any components affecting the wh eels and tyres) could affect the effi-
ciency of the ABS and TCS.
Electronic stabilisation program (ESP)*General notes
The electronic stabilisation program increases the vehicle's
stability on the road.The electronic stabilisation program helps to reduce the danger of skidding.
The electronic stabilisation programme (ESP) consists of ABS, EDL and TCS. Electronic Stabilising Program (ESP)*
ESP reduces the danger of skidding by braking the wheels individually.
The system uses the steering wheel angle and road speed to calculate the
changes of direction desired by the driver, and constantly compares them
with the actual behaviour of the vehi
cle. If the desired course is not being
maintained (for instance, if the car is starting to skid), then the ESP compen-
sates automatically by braking the appropriate wheel.
The forces acting on the braked wheel bring the vehicle back to a stable
condition. If the vehicle tends to oversteer, the system will act on the front
wheel on the outside of the turn.
WARNING
•
It must be remembered that ESP cann ot defy the laws of physics. This
should be kept in mind, particularly on slippery and wet roads and when
towing a trailer.
•
Always adapt your driving style to suit the condition of the roads and
the traffic situation. Do not let the extra safety afforded by ESP tempt you
into taking any risks when driving, this can cause accidents.Caution
•
In order to ensure that ESP functions correctly, all four wheels must be
fitted with the same tyres. Any differences in the rolling radius of the tyres can
cause the system to reduce engine power when this is not desired.
•
Modifications to the vehicle (e.g. to the engine, the brake system, running
gear or any components affecting the wheels and tyres) could affect the effi-
ciency of the ABS, EDL, ESP and TCS.Note
To disconnect using the ESP button ⇒page 147.
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Intelligent technology
168Anti-lock brake system (ABS)The anti-lock brake system prevents the wheels locking during braking
⇒ page 166.Electronic differential lock (EDL)*
The electronic differential lock helps prevent the loss of trac-
tion caused if one of the driven wheels starts spinning.EDL helps the vehicle to start moving, accelerate and climb a gradient in slip-
pery conditions where this may otherwise be difficult or even impossible.
The system will control the revolutions of the drive wheels using the ABS
sensors (in case of an EDL fault the warning lamp for ABS lights up)
⇒page 77.
At speeds of up to approximately 80 km/h, it is able to balance out differ-
ences in the speed of the driven wheel s of approximately 100 rpm caused by
a slippery road surface on one side of the vehicle. It does this by braking the
wheel which has lost traction and distributing more driving force to the other
driven wheel via the differential.
To prevent the disc brake of the braked wheel from overheating, the EDL cuts
out automatically if subjected to excessive loads. The vehicle will continue to
function normally without EDL. For this reason, the driver is not informed that
the EDL has been switched off.
The EDL will switch on again automatically when the brake has cooled down.
WARNING
•
When accelerating on a slippery surface, for example on ice and snow,
press the accelerator carefully. Despite EDL, the driven wheels may start to
spin. This could impair the vehicle's stability.
•
Always adapt your driving style to suit road conditions and the traffic
situation. Do not let the extra safety afforded by EDL tempt you into taking
any risks when driving, this can cause accidents.Caution
Modifications to the vehicle (e. g. to the engine, the brake system, running
gear or any components affecting the wh eels and tyres) could affect the oper-
ation of the EDL ⇒page 186.The traction control system (TCS)The traction control system prevents the drive wheels from spinning when the
car is accelerating ⇒page 166.
WARNING (continued)
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