brake sensor Seat Leon 5D 2008 Owner's manual

Cockpit
78wheels to lock quickly when you brake. This could cause the rear to break
away. Risk of skidding. Stop the vehicle and seek technical assistance.Washer fluid

This warning lamp lights up to indicate that the windscreen
washer level is too low.This serves as a reminder to fill up the reservoir at the earliest opportunity
⇒ page 214.
The following message is shown on the instrument panel display*
11): REFILL
WINDSCREEN WASHER FLUID .
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 equipm ent that is not absolutely necessary
because this will drain the battery.
Tyre pressure*

The tyre pressure control system controls the tyre speed and
the frequency spectrum of each tyre.The tyre monitor
12) compares wheel revolutions and with this information,
the diameter of each wheel using the ESP 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 unbalanc ed 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.
11)Depending on the version of the model.WARNING (continued)
12)Depending on the model version
Fig. 48 Centre console:
tyre monitor system
button
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Intelligent technology177
Safety First
Operating instructions
Practical tips
Te c h n i c a l D a t a
•
With compact temporary spare wheel.
•
When using the snow chains.
•
When driving in deep snow or on soft terrain.
•
When the vehicle is bogged-down, to free it by “rocking.”
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.
XDS*
Driveshaft differentialWhen taking a bend, the driveshaft differential mechanism allows the outer
wheel to turn at a higher speed than the inner wheel. In this way, the wheel
which is turning faster (outer wheel) receives less drive torque than the inner
wheel. This may mean that in certain situations the torque provided to the inner wheel is too high, causing the wheels to spin. On the other hand, the
outer wheel receives a lower drive torque than it could transmit. This causes
an overall loss of lateral grip on the front shaft, resulting in understeering or
“lengthening” of the path.
The XDS system is able, using the ESP sensors and signals, to detect and
correct this effect.
The XDS, via the ESP, brakes the inner wheel thus counteracting the excess
drive torque in this wheel. This means that the path requested by the driver
is more precise,
The XDS system operates in combination with the ESP and is always active,
even when the traction control, TCS, is disconnected.
Electronic stabilisation programme (ESP)*General notes
The electronic stabilisation programme increases the
vehicle's stability on the road.The electronic stabilisation programme helps to reduce the danger of skid-
ding.
The electronic stabilisation programme (ESP) consists of
ABS, EDL, TCS and
Steering manoeuvre recommendations.
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
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Intelligent technology
178maintained (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.
Steering manoeuvre recommendations
This is a complementary safety function included in the ESP This function aids
the driver to better stabilize the vehicle in a critical situation. For example, in
case of sudden braking surface with varied adherence, the vehicle will tend
to destabilize its trajectory to the right to or to the left. In this case the ESP
recognizes the situation and helps the driver with a counter steering
manoeuvre from the power steering.
This function simply provides the driver with a recommended manoeuvre in
critical situations.
The vehicle doesn't steer itself with this function, the driver has full control of
the vehicle at all times.
WARNING
•
It must be remembered that ESP cannot 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 driv ing, 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.
Anti-lock brake system (ABS)The anti-lock brake system prevents the wheels locking during braking
⇒ page 176.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 th e 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 wheels 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 braking 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.
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If and when
242Fuses on left side of dash panelFusesNumber
Consumer
Amperes
1
Diagnosis Switchboard/ Instrument lighting/
Headlight control switchboard/ Flowmeter/
Heated wipers/ Engine management/ AFS Head-
lamps
10
2
Engine control unit/ ABS-ESP switchboard/ Auto-
matic gearbox/ Instrument panel/ Trailer switch-
board/ Light switch / Brake sensor/ Power
steering/ Right an d left headlights
10
3
Airbag
5
4
Heating/ Reverse switch/ ASR-ESP switch/ Elec-
trochrome mirror/ Park Pilot/ Oil level sensor
5
5
Right xenon headlight
10
6
Left xenon headlight
10
7
Vacant
8
Vacant
9
Vacant
10
Vacant
11
Vacant
12
Central locking
15
13
Diagnosis/ Light switch/ Rain sensor/ Heated rear
window
10
14
Automatic gearbox / Heating/ Automatic gearbox
lever
10
15
Vacant
16
Va ca n t
17
Alarm
5
18
Va ca n t
19
Va ca n t
20
Va ca n t
21
Engine management
10
22
Fan switch
40
23
Electric windows (front)
30
24
BCM switchboard
20
25
Rear window heater
25
26
Rear electric windows
30
27
Engine (fuel control unit/pump relay)
15
28
Convenience controls
30
29
Va ca n t
30
Automatic gearbox
20
31
Vacuum pump
20
32
Va ca n t
33
Sunroof
25
34
Comfort switchboard/Central locking system
25
35
Va ca n t
36
Headlight washer system
20
37
Heated seats
30
38
Engine management
10
39
Va ca n t
Number
Consumer
Amperes
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If and when243
Safety First
Operating instructions
Practical tips
Te c h n i c a l D a t a
Some of the electrical items listed in
the table are only fitted on certain
models or are optional extras.
Please note that the above list, while correct at the time of printing, is subject
to alterations. If discrepancies should occur, please refer to the sticker on the
inside of the fuse cover for the co rrect information for your model.
Fuses layout, engine compartment, left partFuses
40
Fan switch
40
41
Rear wiper motor / Switchboard wiring
20
42
12 V socket/ Cigarette lighter
20
43
Trailer bracket preinstallation
15
44
Trailer bracket preinstallation
20
45
Trailer bracket preinstallation
15
46
Vacant
47
Engine management
10
48
Engine management
10
49
Vacant
Number
Consumer
Amperes
1
Windscreen wipers
30
2
DQ200 gearbox
30
3
Cable control unit
5
Number
Consumer
Amperes
4
ABS
20
5
AQ gearbox
15
6
Instrument panel/Steering column
5
7
Ignition key
40
8
Radio
15
9
Te l e p ho n e/ To m To m N a vi ga to r
5
10
Engine management
5
Engine management
10
11
Va ca n t
12
Electronic control unit
5
13
Petrol injection module supply
15
Diesel injection module supply
30
14
Coil
20
15
Engine management
5
Pump relay
10
16
Right lighting
30
17
Horn
15
18
Va ca n t
19
Clean
30
20
Water pump
10
Pressure sensor pump for 1.8 engine
20
21a)
Lambda probe
15
22
Brake pedal, speed sensor
5
Number
Consumer
Amperes
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