2009 Seat Leon 5D ECU

Seat belts
22Seat belts protection
Passengers not wearing seat belts risk severe injuries in the
event of an accident.Properly worn seat belts hold the vehicle occupants in the correct sitting posi-
tions and substantially reduce the kinetic energy in the event of an accident.
Seat belts also help to prevent uncontrolled movements that could lead to
severe injuries. In addition, properly worn seat belts reduce the danger of
being thrown from the car.
Passengers wearing their seat belts correctly benefit greatly from the ability
of the belts to absorb kinetic energy. The front part of your vehicle and other
passive safety features (such as the airbag system) are also designed to
absorb the kinetic energy released in a collision. Taken together, all these
features reduce the releasing kinetic energy and consequently, the risk of
injury.
Our examples describe frontal collisions. Of course, properly worn seat belts
substantially reduce the risk of injury in all other types of accidents. This is why it is so important to fasten seat belts before every trip, even when "just
driving around the corner".
Ensure that your passengers wear their seat belts as well. Accident statistics
have shown properly that wearing seat belts is an effective mean of substan-
tially reducing the risk of injury and improving the chances of survival in a
serious accident. Furthermore, properly worn seat belts improve the protec-
tion provided by airbags in the event of an accident. For this reason, wearing
a seat belt is required by law in most countries.
Although your vehicle is equipped with airbags, the seat belts must be
fastened and worn. The front airbags, for example, are only triggered in some
frontal accidents. The front airbags will not be triggered during minor frontal
collisions, minor side collisions, rear collisions, rolls or accidents in which the
airbag trigger threshold value in the control unit is not exceeded.
Therefore, you should always wear your seat belt and ensure that your
passengers have fastened their seat belts properly before you drive off!
Safety instructions
on using seat belts
If seat belts are used correctly, they can reduce the risk of
injury in an accident.– Always wear the seat belt as described in this booklet.
– Ensure that the seat belts can be fastened at all times and are not damaged.
WARNING
•If the seat belts are worn incorrectly or not at all, the risk of severe inju-
ries increases. The optimal protection from seat belts can be achieved only
if you use them properly.
Fig. 10 Driver wearing
the seat belt properly: is
secured by the belt in
sharp braking
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Seat belts23
Safety First
Controls and equipment
Practical tips
Technical Data
•Fasten your seat belt before every trip - even when driving in town. The
other passengers must also wear the seat belt, otherwise they may be
danger of injury!•The seat belt cannot offer its full protection if the belt web is not posi-
tioned correctly.•Never allow two passengers (even children) to share the same seat belt.•Keep both feet in the foot-well in front of your seat as long as the
vehicle is in motion.•Never unbuckle a seat belt while the vehicle is in motion. Risk of fatal
injury.•The belt webbing must never be twisted while it is being worn.•The belt webbing should never lie on hard or fragile objects (such as
glasses or pens, etc.) because this can cause injuries.•Do not allow the seat belt to be damaged or jammed, or to rub on any
sharp edges.•Never wear the seat belt under the arm or in any other incorrect posi-
tion.•Loose, bulky clothing (such as an overcoat over a jacket) impairs the
proper fit and function of the belts, reducing their capacity to protect.•The slot in the seat belt buckle must not be blocked with paper or other
objects, as this can prevent the latch plate from engaging securely.•Never use seat belt clips, retaining rings or similar instruments to alter
the position of the belt webbing.•Frayed or torn seat belts or damage to the connections, belt retractors
or parts of the buckle could cause severe injuries in the event of an acci-
dent. Therefore, you must check the co ndition of all seat belts at regular
intervals.•Seat belts which have been worn in an accident and stretched must be
replaced by a qualified workshop. Renewal may be necessary even if there
is no apparent damage. The belt anchorage should also be checked.
•Do not attempt to repair a damaged seat belt yourself. The seat belts
must not be removed or modified in any way.•The belts must be kept clean, otherwise the retractors may not work
properly ⇒ page 205.
Seat beltsSeat belt adjustment
The seat belts for the front and rear occupants are locked into
position by a latch.The seat belt cannot offer its full protection if the belt web is not
positioned correctly.
WARNING (continued)
WARNING (continued)
Fig. 11 Belt buckle and
latch plate of seat belt
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Seat belts
24
– Adjust the seat and head restraint correctly.
– To fasten the belt, take hold of the latch plate and pull it slowly across your chest and lap.
– Insert the latch plate into the buckle for the appropriate seat and push it down until it is secure ly locked with an audible click
⇒ page 23, fig. 11 .
– Pull the belt to ensure that the latch plate is securely engaged in the buckle.The seat belts are equipped with an automatic retractor on the shoulder
s t ra p. Fu ll f r e e d o m o f m ov e m e n t i s p e r m i t t e d w h e n t h e s h o u l d e r b e l t is p ul le d
slowly. However, during sudden braking, during travel in mountains or bends
and during acceleration, the automatic retractor on the shoulder belt is
locked.
The automatic belt retractors on the front seats are fitted with belt tension
devices ⇒page 27.
WARNING
•An incorrectly worn seat belt web can cause severe injuries in the event
of an accident.•The seat belts offer best protection only when the backrests are in an
upright position and the seat belts have been fastened properly.•Never put the latch plate in the buckle of another seat. If you do this, the
seat belt will not protect you properly and the risk of injury is increased.•I f an o cc u pa n t is i n co r re c t l y b e l te d i n , t h e b e l t can n ot p ro te c t h i m o r h e r
properly. An incorrectly positioned belt web can cause extremely severe
injuries.•Always engage the retractor lock when you are securing a child seat in
group 0, 0+ or 1 ⇒page 44.
Seat belt position
Seat belts offer their maximum protection only when they are
properly positioned.
Fig. 12 Correct belt web
and head restraint posi-
tions, viewed from frontFig. 13 Correct belt web
and head restraint posi-
tions, viewed from side
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Seat belts25
Safety First
Controls and equipment
Practical tips
Technical Data
The following features are available to adjust the seat belt in the shoulder
region:
•belt height adjustment for the front seats.•front seat height adjustment*.WARNING
•An incorrectly worn seat belt web can cause severe injuries in the event
of an accident.•The shoulder part of the seat belt must lie on the centre of the shoulder,
never across the neck. The seat belt must lie flat and snugly on the torso
⇒ page 24, fig. 12.•The lap part of the seat belt must lie across the pelvis, never across the
stomach. The seat belt must lie flat and snugly on the pelvis ⇒page 24,
fig. 13 . Pull the belt tight if necessary to take up any slack.•Read and observe the warnings ⇒page 22.
Pregnant women must also fasten their seat belts properly
The best protection for the unbo rn child is for the mother to
wear the seat belt properly at all times during the pregnancy.The seat belt provides maximum protection only when the belt web
is properly positioned ⇒page 24.
– Adjust the front seat and head restraint correctly ⇒page 10.
– Holding the latch plate, pull the belt evenly across your chest and as low as possible over the pelvis ⇒fig. 14 .
– Insert the latch plate into the buckle for the corresponding seat and push it down until it is securely locked with an audible click
⇒ .
– Pull the belt to ensure that the latch plate is securely engaged in the buckle.
Fig. 14 Positioning seat
belts during pregnancy
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Seat belts27
Safety First
Controls and equipment
Practical tips
Technical Data
– Press the upper part of the shoulder belt guide and hold it in this
position ⇒page 26, fig. 16 .
– Move the shoulder belt guide up or down until you have adjusted the seat belt ⇒ page 24.
– After adjusting, pull the shoulder belt sharply to check that the catch on the shoulder belt guide is engaged securely.Incorrectly fastened seat belts
Incorrectly worn seat belts can cause severe injuries.Seat belts can provide optimal protection only if the belt web is
properly worn. The seat belts must be fastened exactly in the order
described in this chapter. An incorrect sitting position impairs
substantially the protection a seat belt offers and can lead to severe
or fatal injuries. The risk of severe or fatal injuries is especially
increased when a deploying airbag strikes an occupant who has
assumed an incorrect sitting position. As driver, you are responsible
for all vehicle occupants, especially children. Therefore:
– Never permit anyone to assume an incorrect sitting position in the vehicle while travelling ⇒.
WARNING
•An incorrectly worn seat belt increases the risk of severe injuries.•Before every trip, instruct your passengers to adjust their seat belts
properly and to wear them during the trip.•Read and always observe information and warnings concerning the use
of seat belts ⇒page 22.
Belt tension devicesFunction of the belt tension device
During a frontal collision, the seat belts on the front seats are
retracted automatically.The seat belts for the front occupants are equipped with belt tension devices.
Sensors will only trigger the belt tension devices during severe head-on,
lateral and rear collisions, and only if the seat belt is actually being worn. This
retracts and tightens the seat belts, reducing the forward motion of the occu-
pants.
The belt tension device can be triggered only once.
The belt tension devices will not be triggered in the event of a light frontal,
side or rear collision, if the vehicle overturns or in situations where no large
forces act on the front, side or rear of the vehicle.
Note
•If the belt tension devices are triggered, a fine dust is produced. This is
normal and it is not an indication of fire in the vehicle.•The relevant safety requirements must be observed when the vehicle or
components of the system are scrapped. A qualified workshop is familiar with
these regulations and will be pleased to pass on the information to you.Service and disposal of belt tension devicesThe belt tension devices are components of the seat belts that are installed
in the seats of your vehicle. If you work on the belt tension devices or remove
and install parts of the system when performing other repair work, the seat
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Airbag system
30•Always properly adjust the front seats.
The danger of fitting a child seat on the front passenger seat
Rear-facing child seats must never be used on the front
passenger seat when the front passenger airbag is enabled.An enabled front airbag on the front passenger side is potentially a major
danger to a child. The front passenger seat is life threatening to a child if
he/she is transported in a rear-facing child seat. You should always transport
all children up to 12 years of age on the rear seat.
If a rear-facing child seat is secured to the front passenger seat, an inflating
airbag can strike it with such great force that critical or fatal injuries may
result.
Therefore we strongly recommend you to transport children on the rear seats.
That is the safest place for children in the vehicle. Alternatively, the front
passenger airbag can be disabled with a key-operated switch ⇒page 42.
When transporting children, use a child seat appropriate to the age and size
of each child ⇒page 44.
For those vehicles that do not include a key lock switch to turn the airbag off,
an Authorised Service Centre must be consulted.
WARNING
•If a child seat is secured to the front passenger seat, the risk to the child
of sustaining critical or fatal injuries in the event of an accident increases.•Never secure a rear-facing child seat to the front passenger seat if the
front passenger airbag is enabled. The child can suffer critical or fatal inju-
ries when the front passenger airbag is triggered.
•An inflating front passenger airbag can strike the rear-facing child seat
and hurl it with great force against the door, the roof or the backrest.•For those vehicles that do not include a key lock switch to turn the
airbag off, an Authorised Service Centre must be consulted.•If, under special circumstances, it is necessary to transport a child in a
rear-facing child seat on the front passenger seat, it is absolutely essential
that you observe the following safety measures:
−Disable the front passenger airbag ⇒page 42, “Deactivating
airbags*”.
− The child seat must be approved by the child seat manufacturer for
use on a front passenger seat with front or side airbag.
− Follow the installation instructions given by the child seat manufac-
turer and observe the safety instructions ⇒page 44, “Child safety”.
− Before properly installing the child seat, push the front passenger
seat completely backwards so that the greatest possible distance to
the front passenger airbag is ensured.
− Ensure that no objects prevent the front passenger seat from being
pushed completely back.
− The backrest of the front passenger seat must be in an upright
position.
Warning lamp for airbag and belt tension device system

This warning lamp monitors the airbag and belt tension
device system.The warning lamp monitors all airbags and belt tension devices in the
vehicle, including control units and wiring connections.
WARNING (continued)
WARNING (continued)
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Child safety45
Safety First
Controls and equipment
Practical tips
Technical Data
Safety notes on using child seats
Proper use of child seats substantially reduces the risk of
injury in an accident!As the driver, you are responsible for any children you transport in
your vehicle.
– Protect your children by properly using appropriate child seats
⇒page 46.
– Always ensure that the belt webbing is properly positioned according to the instructions provided by the manufacturer of the
child seat.
– When travelling, do not allow children to distract you from traffic.
– Take breaks regularly during long trips. Take a break at least
every two hours.
WARNING
•Never install a child seat facing backwards (or rear-facing) on the front
passenger seat unless the front passenger airbag has been disabled. This
could lead to a risk of potentially fatal injuries to the child! However, if it is
necessary, in exceptional cases, to transport a child in the front passenger
seat, the front passenger airbag must always be disabled ⇒page 42,
“Deactivating airbags*”. If the passenger seat has a height adjustment
option, move it to the highest position.•For those vehicles that do not include a key lock switch to turn the
airbag off, an Authorised Service Centre must be consulted.•All passengers, especially children, must assume the proper sitting
position and be properly belted in while travelling.
•Never hold children or babies on your lap, this can result in potentially
fatal injuries to the child!•Never allow a child to be transported in a vehicle without being properly
secured, or to stand up or kneel on a seat while travelling. In an accident,
the child could be flung through the vehicle, causing possibly fatal injuries
to themselves and to the other passengers.•If children assume an improper sitting position when the car is moving,
they expose themselves to greater risk of injury in the event of sudden
braking manoeuvre or in an accident. This is particularly important if the
child is travelling on the front passenger seat and the airbag system is trig-
gered in an accident; as this could cause serious injury or even death.•A suitable child seat can protect your child!•Never leave an unsupervised child alone on a child seat or in the
vehicle.•Depending on weather conditions, it may become extremely hot or cold
inside the vehicle. This can be fatal.•Children who are less than 1.5 metres tall must not wear a normal seat
belt without a child restraint system, as this could cause injuries to the
abdominal and neck areas during a sudden braking manoeuvre or in an
accident.•Do not allow the belt webbing to become twisted or jammed, or to rub
on any sharp edges.•Incorrectly worn seat belts can cause injuries even in a minor collision
or in sudden braking manoeuvres.•The seat belt provides maximum protection only when the belt web is
properly positioned ⇒page 23, “Seat belts”.•Only one child may occupy a child seat ⇒page 46, “Child seats”.WARNING (continued)
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Child safety49
Safety First
Controls and equipment
Practical tips
Technical Data
Securing child seatsWays to secure a child seat
A child seat can be secured differently on the rear seat and on
the front passenger seat.You can secure a child seat to the rear seat or front passenger seat in the
following ways:•Child seats in groups 0 to 3 can be secured with a seat belt.•Child seats for groups 0, 0+ and 1 with the “ISOFIX” system can be
secured, without fastening seat belts, with the “ISOFIX” securing rings
⇒ page 49.
U: Suitable for universal approved restraining systems for use in this age category (universal retention systems are those fitted using the adult
seat belt).
*: Move the passenger seat as far to rear as possible, as high as possible and always deactivate the airbag.
L: Suitable for retention systems using the “ISOFIX” anchors.
WARNING
•When travelling, children must be secured in the vehicle with a
restraint system suitable for age, weight and size.•Never install a child seat facing backwards (or rear-facing) on the front
passenger seat unless the front passenger airbag has been disabled. This
could lead to a risk of potentially fatal injuries to the child! However, if it is
necessary, in exceptional cases, to transport a child in the front passenger
seat, the front passenger airbag must always be disabled ⇒page 42,
“Deactivating airbags*” and move the seat to its highest position, in case
it has this adjustment.•Read and always observe information and warnings concerning the use
of child seats ⇒ page 45.
Securing child seat with the “ISOFIX” system
The child seat with “ISOFIX” system can be secured quickly,
easily and safely on the rear outer seats using the system
Category
Weight
Seat locations
Front
passenger
Rear outer
Rear centre
Group 0
<10 kg
U*
U/L
U
Group 0+
<13 kg
U*
U/L
U
Group 1
9-18 kg
U*
U/L
U
Group 2 / 3
15-36 kg
U*
U
U
Fig. 30 ISOFIX securing
rings
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