Get Driver assistance systems -> Braking and stability systems Guide for Seat Ibiza SUV Fourth Generation (2009-2017)

Driver assistance systems

The ESC system is always active and cannot

be switched off. The ESC switch only switches

the ASR off.

WARNING

Driver assistance systems

●

Do not forget that the electronic stability

control ESC cannot defy the laws of physics.

This should be kept in mind, particularly on

slippery and wet roads and when towing a

trailer.

Braking and stability systems

The ASR can be deactivated when wheel spin

is desirable ››› page 141.

Electronic Stability Control (ESC)*

For example:

●

Always adapt your driving style to suit the

condition of the roads and the traffic situa-

tion. The greater safety provided by the ESC

should not encourage you to run any risks.

●

When driving with snow chains.

When driving in deep snow or on loose sur-

faces.

●

When the vehicle is stuck, to rock it back-

CAUTION

wards and forwards.

●

To ensure that the ESC works correctly, all

Press the button to switch the ASR back on

when you no longer need wheel spin.

four wheels must be fitted with the same

tyres. Any differences in the rolling radius of

the tyres can cause the system to reduce en-

gine power when this is not desired.

Electronic Stability Control (ESC)*

Fig. 140 Detailed view of the dash panel: ESC

switch.

●

Any modifications made to the vehicle (for

The ESC reduces the risk of skidding by brak-

ing the wheels individually.

example, to the engine, brake system, run-

ning gear or to the combination of wheels

and tyres) may affect the operation of the

ABS, EDL, ESC and ASR.

This Electronic Stability System reduces the

risk of skidding and improves the vehicle's

stability and ability to hold the road.

The system uses the steering wheel angle

and road speed to calculate the changes of

direction desired by the driver, and constant-

ly compares them with the actual behaviour

of the vehicle. When irregularities occur, for

example, if the vehicle begins to skid, the

ESC brakes the appropriate wheel automati-

cally.

The Electronic Stability Control (ESC) contains

the electronic differential lock (EDL) and the

traction control system (ASR). The ESC works

together with the ABS. Both control lamps

will light up if the ESC or ABS systems are

faulty.

Electronic differential lock (EDL)*

EDL helps the vehicle to start moving, accel-

erate and climb a gradient in slippery condi-

tions where this may otherwise be difficult or

even impossible.

The forces acting on the braked wheel bring

the vehicle back to a stable condition. If the

vehicle tends to oversteer (the rear end

slides out), the system will act on the front

wheel on the outside of the turn.

The ESC system is started automatically

when the engine is started.

It uses the ABS sensors to monitor the speed

of the driven wheels. In case of an EDL fault,

139

Operation

the warning light for ABS lights up

››› page 59.

a standstill, the hazard warning lights will

then come on and the brake lights will re-

main on permanently from that moment. The

warning lights will automatically switch off

when the vehicle begins to move again or

when the "warning" light button is pressed.

CAUTION

Modifications to the vehicle (e.g. to the en-

gine, the brake system, running gear or any

components affecting the wheels and tyres)

could affect the efficiency of the EDL

››› page 155.

At speeds of up to approximately 80 km/h

(50 mph), it is able to balance out differences

in the speed of the driven wheels of approxi-

mately 100 rpm/min caused by a partially

slippery road surface. It does this by braking

the wheel which has lost traction and distrib-

uting more driving force to the other driven

wheel via the differential.

WARNING

●

The risk of accident is higher if you drive

Hydraulic Brake Assist (HBA)*

too fast, if you do not keep your distance from

the vehicle in front, and when the road sur-

face is slippery or wet. The increased acci-

dent risk cannot be reduced by the brake as-

sist system.

The function (Hydraulic Brake Assist HBA) is

only included in vehicles with ESC.

To prevent the disc brake of the braking

wheel from overheating, the EDL cuts out au-

tomatically 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.

In an emergency, most drivers brake in time,

but not with maximum force. This results in

unnecessarily long braking distances.

●

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.

This is when the brake assist system comes

into action. When pressing the brake pedal

rapidly, the assistant interprets it as an emer-

gency. It very quickly builds up the full brake

pressure so that the ABS can be activated

more quickly and efficiently, thus reducing

braking distance.

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 accel-

erator carefully. Despite EDL, the driven

wheels may start to spin. This could impair

the vehicle's stability.

Anti-lock brake system (ABS)

Do not reduce the pressure on the brake ped-

al, since the brake assist system switches off

automatically as soon as you release the

brake.

The anti-lock brake (ABS) system prevents

the wheels from locking during braking and

is an important part of the vehicle's active

safety system.

●

Always adapt your driving style to suit road

conditions and the traffic situation. Do not let

the extra safety afforded by EDL tempt you in-

to taking any risks when driving, this can

cause accidents.

Automatic hazard warning lights activation

How the ABS works

The brake lights flash automatically to indi-

cate that the vehicle is braking suddenly or in

an emergency situation. If the emergency

braking continues until the vehicle comes to

If one of the wheels turns too slowly in rela-

tion to the vehicle's speed, and is close to

locking, the system will reduce the braking

140

Driver assistance systems

●

pressure to 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 intervened. In this

situation it is important to keep the brake

pedal fully depressed so the ABS can regu-

late the brake application. Do not “pump”.

When driving in deep snow or on soft ter-

rain.

Traction control system (ASR)*

The traction control system prevents the driv-

en wheels from spinning when the vehicle is

accelerating. This system always includes

ABS.

●

When the vehicle is bogged-down, to free it

“by rocking it.”

The ASR should be switched on again as

soon as possible.

Description and operation of the traction

control system during acceleration (ASR

WARNING

●

Remember that not even the ASR can defy

On front-wheel drive vehicles, the ASR sys-

tem intervenes, reducing engine power and

preventing the driven wheels from slipping

during acceleration. The system works in the

entire speed range in conjunction with ABS.

If a failure occurs in the ABS, the ASR will al-

so stop working.

If you brake hard on a slippery road surface,

the best possible control is retained as the

wheels do not lock.

the laws of physics. This should be kept in

mind, particularly on slippery and wet roads

and when towing a trailer.

However, ABS will not necessarily guarantee

shorter braking distances in all conditions.

Braking distance could even be further if you

brake on gravel or on fresh snow on a slip-

pery surface.

●

Always adapt your driving style to suit the

condition of the roads and the traffic situa-

tion. The greater safety provided by the ASR

should not encourage you to run any risks.

TCS helps the car to start moving, accelerate

and climb a gradient in slippery conditions

where this may otherwise be difficult or even

impossible.

CAUTION

WARNING

●

To ensure that the ASR works correctly,

●

The anti-lock brake system cannot defy the

identical tyres should be fitted on all four

wheels. Any differences in the rolling radius

of the tyres can cause the system to reduce

engine power when this is not desired.

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 fea-

tures tempt you into taking any risks when

driving.

The ASR automatically switches on when the

engine is started. If necessary, it may be

turned on or off by briefly pressing the ESC

button on the centre console.

●

Any modifications made to the vehicle (for

example, to the engine, brake system, run-

ning gear or to the combination of wheels

and tyres) may affect the operation of the

ABS and ASR.

When the ASR is off, the warning lamp lights

up . The ASR should normally be left on.

Only in exceptional circumstances, when

wheel spin is required, can they be turned off

using the ESC button, for example:

●

The effectiveness of ABS is also determined

by the tyres fitted ››› page 176.

●

If the running gear or brake system is modi-

●

With compact temporary spare wheel.

When using the snow chains.

fied, the effectiveness of the ABS could be se-

verely limited.

141

Operation

–

If the brake servo is not functioning, e.g. due

to a malfunction, or if the vehicle is being

towed, you will have to press the brake pedal

considerably harder to make up for the lack

of servo assistance.

The instrument panel display shows infor-

mation about the status of the Start-Stop

function ››› Fig. 142.

XDS*

When taking a curve, the driveshaft differen-

tial mechanism allows the outer wheel to turn

at a higher speed than the inner wheel. In

this way, the wheel that is turning faster (out-

er wheel) receives less drive torque than the

inner wheel. This may mean that in certain

situations the torque delivered to the inner

wheel is too high, causing the wheels to

spin. On the other hand, the outer wheel is

receiving a lower drive torque than it could

transmit. This causes an overall loss of lateral

grip on the front axle, resulting in understeer

or “lengthening” of the trajectory.

Start-Stop function conditions

●

The driver seat belt must be buckled.

The bonnet must be closed.

WARNING

The braking distance can also be affected by

external factors.

The engine must be at operating tempera-

ture.

●

Never let the vehicle coast with the engine

●

The steering wheel must be straight.

The vehicle must be on flat ground.

The vehicle must not be in reverse.

A trailer must not be connected.

switched off. Failure to follow this instruction

could result in an accident. The braking dis-

tance is increased considerably when the

brake servo is not active.

●

If the brake servo is not working, for exam-

The temperature of the interior must be

A/C

ple when the vehicle is being towed, you will

have to press the brake pedal considerably

harder than normal.

The XDS system can detect and correct this

effect via the sensors and signals of the ESC.

within the comfort limits (

be selected).

button should

Via the ESC, the XDS will brake the inside

wheel and counter the excess driving torque

of that wheel. This means that the driver's

desired trajectory is much more precise,

●

The windscreen de-mist function must be

off.

●

If in an increase in airflow is not requested.

The temperature must not be set to HI or

Start-Stop System*

●

The XDS system works in combination with

the ESC and is always active, even when ASR

traction control is disconnected.

LO.

Description and operation

●

The driver door must be closed.

The Start-Stop function stops the engine

when the vehicle is stopped and starts it au-

tomatically when required.

●

The diesel particulate filter must not be in

regeneration mode, for diesel engines.

Brake servo

●

The battery charge must not be low for the

next start.

–

When the vehicle is stopped, put it in neu-

tral and release the clutch pedal. The en-

gine will stop.

The brake servo increases the pressure you

apply to the brake pedal. It works only when

the engine is running.

●

Battery temperature must be between -1 °C

(+30 °F) and +55 °C (+131 °F).

–

When the clutch pedal is pressed, the en-

gine starts again.

142

Driver assistance systems -> Braking and stability systems for Your Seat Ibiza SUV Fourth Generation (2009-2017)

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