sensor SKODA OCTAVIA 2009 2.G / (1Z) Owner's Guide

Intelligent Technology
193
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Driving TipsIntelligent TechnologyElectronic stability programme (ESP)*GeneralGeneral The ESP aids you maintain control of your vehicle in situations in borderline driving situations such as when negotiating a curve too fast. The risk of skidding is reduced and your vehicle thus offers greater driving stability depending on the conditions of the road surface. This occurs at all speeds. The following systems are integrated into the electronic stability programme:•
Electronic Differential Lock (EDL),
•
Traction control system (TCS),
•
Active driver-steering recommendation (DSR),
•
Antilock brake system (ABS),
•
Brake Assist,
•
Uphill-Start off-Assist.
Operating principle The ESP switches on automatically when the engine is started and then conducts a self-test. The ESP control unit processes data from the individual systems. It also processes additional measurement data which are supplied by highly sensitive sensors: the rotational velocity of the vehi
cle about its vertical axis, the lateral accel-
eration of the vehicle, the brakin
g pressure and the steering angle.
The direction which the driver wishes to ta
ke is determined based on the steering
angle and the speed of the vehicle and is constantly compared with the actual behaviour of the vehicle. If differences exis
t, such as the vehicle beginning to skid,
the ESP will automatically brake the appropriate wheel. The car is stabilised again by the forces which take effect when the wheel is braked. Intervention into the brake system takes place primarily on the outer front wheel of a vehicle which tends to oversteer (tendency for the rear of the vehicle to break away) while occurs this is on the inner re
ar wheel of a vehicle which tends to under-
steer (tendency to shift out of the curve). This braking control cycle is accompanied by noises. The ESP operates in combination with the ABS
⇒page 197, “Antilock brake system
(ABS)”. If there is a fault in the ABS system, the ESP also does not operate. The ESP warning light lights up in the instru
ment cluster when there is a fault on the
ESP
 ⇒page 37.
Switching off You can switch the ESP off and on again
as you wish, by pressing the button
⇒ fig. 196
. The ESP warning light lights up in th
e instrument cluster when the ESP is
switched off
 ⇒page 37.
The ESP should normally always be switched
on. It may be good practice in certain
exceptional cases, such as when you wish
to have wheel slip, to switch off the
system. Examples:
Fig. 196 ESP switch
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Intelligent Technology
194
•
when driving with snow chains
•
when driving in deep snow or on a loose surface
•
when it is necessary to rock a vehicle when it has become stuck.
then you should switch on the ESP again.
WARNING
It is also not possible for the ESP to overcome the physical limits of the vehicle. Even if a vehicle fitted with ESP you should still always adapt your style of driving to the condition of the
road surface and the traffic situation.
This particularly applies when driving on slippery and wet roads. The increased safety offered must not tempt you to take greater risks than other- wise - risk of an accident!
Note
•
All four wheels must be fitted with the same tyres in order to achieve problem-
free operation of the ESP. Differing rolling
circumferences of the tyres can lead to an
undesirable reduction in the engine output.•
Changes to vehicle (e.g. on engine, on the brakes, on chassis or other assign-
ment of tyres and wheels) can influence the function of the ESP
⇒page 244,
“Accessories, changes and replacement of parts”.Electronic Differential Lock (EDL)* The electronic differential lock pr
events an individual wheel from
slipping.Models fitted with ESP are equipped with electronic differential lock (EDL). General The EDL makes it much easier, and sometimes at all possible, to start off, accelerate and climb a steep hill when the conditio
ns of the road surface are unfavourable.
Operating principle The EDL is activated automatically, that is
without any action on the part of the
driver. It monitors the speeds of the driven wheels with the aid of the ABS sensors. Should only
one
drive wheel begin spinning on a slippery surface there will be an
appreciable difference in the speed of the driven wheels. The EDL function brakes the slipping wheel and the differential transmits a greater driving force to the other driven wheel. This control proces
s is also accompanied by noises.
Overheating of the brakes The EDL switches off
automatically if unusually severe
stresses exist in order to
avoid excessive heat generation in the
disc brake on the wheel which is being
braked. The vehicle can continue to be driv
en and has the same characteristics as a
vehicle not fitted with EDL. The EDL switches on again
automatically as soon as the brake has cooled down.
WARNING
•
Carefully depress the accelerator when accelerating on uniformly slip-
pery road surfaces, such as ice and sn
ow. The driven wheels might still spin
despite the EDL and affect the stability
of the vehicle - risk of an accident!
•
You should always adapt your style of driving to the condition of road
surface and to the traffic situation even
when your vehicle is fitted with EDL.
The increased safety offered must not tempt you to take greater risks than otherwise - risk of an accident!
Note
•
If the ABS or ESP warning light comes on,
this may also indicate a fault in the
EDL. Please have the vehicle inspected as soon as possible by a specialist garage.•
Changes to vehicle (e.g. on engine, on
the brakes, on chassis or other assign-
ment of tyres and wheels) can in
fluence the function of the EDL
⇒page 244,
“Accessories, changes and
replacement of parts”.
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Intelligent Technology
195
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Traction control system (TCS) The traction control system prevents
the driven wheels from spinning
when accelerating.General The TCS makes it much easier, and sometimes at all possible, to start off, accelerate and climb a steep hill when the conditio
ns of the road surface are unfavourable.
Operating principle The TCS switches on automatically when th
e engine is started and then conducts a
self-test. The system monitors the speeds of the driven wheels with the aid of the ABS sensors. If the wheels are spinning, the force transmitted to the road surface is automatically adapted by redu
cing the engine speed. Th
is occurs at all speeds.
The TCS operates in combination with the ABS
⇒page 197, “Antilock brake system
(ABS)”. The TCS will not function if a fault exists in the ABS system. The TCS warning light lights up in the instrument cluster when there is a fault on the TCS
 ⇒page 37.
Switching off You can switch the TCS off and on again
as you wish by pressing the button
⇒ fig. 197
. The TCS warning light lights up in the instrument cluster when the TCS is
switched off
 ⇒page 37.
The TCS should normally always be switched on. It may be good practice in certain exceptional cases, such as when you wish
to have wheel slip, to switch off the
system. Examples:•
when driving with snow chains
•
when driving in deep snow or on a loose surface
•
when it is necessary to rock a vehicle when it has become stuck.
then you should switch on the TCS again.
WARNING
You should always adjust your style of driving to the conditions of the road surface and the traffic situation. The increased safety offered must not tempt you to take greater risks than otherwise - risk of an accident!
Note
•
All four wheels must be fitted with the same tyres in order to achieve problem-
free operation of the TCS. Differing rolling circumferences of the tyres can lead to an undesirable reduction in the engine output.•
Changes to vehicle (e.g. on engine, on the brakes, on chassis or other assign-
ment of tyres and wheels) can in
fluence the function of the TCS
⇒page 244,
“Accessories, changes and replacement of parts”.Active driver-steering recommendation (DSR)*Vehicles with ESP are equi
pped with active driver-steering recommendation (DSR).
This function indicates to the driver in critical situations a steering recommendation in order to stabilise the vehicle. The active driver-steering recommendation is acti-vated, for example, on the right and left
vehicle side when
braking sharply on
different road surfaces.
Fig. 197 TCS switch
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Intelligent Technology
199
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Tyre inflation pressu
re-control system*
The tyre inflation pressure-control system compares with the aid of the ABS sensors the speed and also the rolling circumference
of the individual wheels. If the rolling
circumference of a wheel is changed, the warning light
 lights up in the instru-
ment cluster
⇒page 38 and an audible signal sound
s. The rolling circumference of
the tyre can change if:•
the tyre inflation pressure is too low,
•
the structure of the tyre is damaged,
•
the vehicle is loaded on one side,
•
the wheels of an axle are loaded heavily (e.g. when towing a trailer or when
driving uphill or downhill),•
snow chains are mounted,
•
the temporary spare wheel is mounted,
•
one wheel per axle was changed.
Basic setting of tyre inflation pressure-control system After changing the tyre inflation pressures or after changing one or several wheels, a basic setting of the system must be carried out as follows.•
Inflate all tyres to the specified inflation pressure
⇒page 238.
•
Switch on the ignition.
•
Press button
⇒fig. 198
for more than 2 seconds. While pressing the
button, the warning light
 lights up. At the same time the memory of the system
is erased and the new calibration is star
ted, which is confirmed with an audible
signal and then the warning light
 goes out.
•
If the warning light
 does not go out after the basic setting, there is a fault in
the system. Have the vehicle inspected by your nearest specialist garage. Warning light
 lights up
If the tyre inflation pressure of at least on
e wheel is insufficiently inflated in compar-
ison to the stored basic value, the warning light
 ⇒
lights up.
Warning light
 flashes
If the warning light flashes, there is a system fault. Have the vehicle inspected by your nearest specialist garage.
WARNING
•
When the warning light
 lights up, immediately reduce the speed and
avoid sudden steering and brake mano
euvres. Please stop the vehicle
without delay at the nearest possible stop and inspect the tyres and their inflation pressures.•
The driver is responsible for the correc
t tyre inflation pressures. For this
reason, the tyre inflation pressures must be checked regularly.•
Under certain circumstances (e.g. sporty style of driving, wintry or
unpaved roads) the warning light
 can be delayed or does not light up at
all.•
The tyre inflation pressure-control system does not take away the
responsability from the driver for the correct tyre inflation pressure.
Note
The tyre inflation pressure-control system:•
does not replace the regular tyre inflatio
n pressure control, because the system
cannot detect an even pressure loss,
Fig. 198 Button for setting the tyre inflation pressure control value
 
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Fuses and light bulbs
260
Fuse assignment in the dash panelCertain electrical components are only standard on certain vehicle model versions or only suppliable as optional
equipment for certain models.
F13
Engine control unit
15/30
F14
Ignition
20
F15
Lambda probe NO
x sensor, fuel pump relay
Glow plug system relay
10 15 5
F16
Central control unit, right main headlight, right rear light unit
30
F17
Horn
15
F18
Amplifier for digital sound processor
30
F19
Front window wiper
30
F20
Water pumpvalve for fuel dosing
1020
F21
Lambda probe
10/15
F22
Clutch pedal switch, brake pedal switch
5
F23
Secondary air pump Air mass meter Fuel high pressure pump
5 10 15
F24
Activated charcoal filter, ex
haust gas recirculation valve
10
F25
Pump for ABS
30/40
F26
Central control unit, left main headlight, left rear light unit
30
F27
Secondary air pump Glow plug system
4050
F28
Not assigned
F29
Power supply terminal 30
50
F30
Te r m i n a l X
a)
50
a)In order not to drain the battery unnecessarily
when starting the engine, the electrical com-
ponents of this terminal are automatically switched off.No.
Power consumer
Amperes
No.
Power consumer
Amperes
1
Diagnostic socket, Engine co
ntrol unit, Electrical fuel
pump
10
2
Control unit for ABS, ESP
5
3
Airbag
5
4
Heating, Air conditioning system, Reversing lights
5
5
Control unit for headla
mp beam adjustment
5
6
Instrument cluster, Control unit for automatic gearbox, Control unit for electromec
hanical power steering,
Parking aid; Haldex clutch
5
7
Not assigned
8
Not assigned
9
Not assigned
10
Not assigned
11
Not assigned
Fig. 240 Schematic repre- sentation of the fuse carrier in the dash panel
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