Frelander 2. Manual — part 695

Supplementary restraints system

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Supplementary restraints system

PRINCIPLE OF OPERATION

Introduction

In the event of a collision the airbag control unit
monitors the rate of deceleration caused by the
collision. This information is then used to
determine whether airbags should be
deployed.

Airbag deployment is dependent on the rate at
which the passenger compartment changes
speed following the collision. The
circumstances affecting different collisions
(vehicle speed, angle of impact, type and size
of object hit, etc) vary considerably, and will
affect the rate of deceleration accordingly.

The Supplementary Restraint System (SRS)
components include :-
• SRS warning indicator.
• Rotary coupler.
• Airbag modules.
• Seat belt pre-tensioners.
• Airbag diagnostic control unit.
• Crash sensors.
• Airbag wiring harnesses.
• Seat occupancy sensor.
Note: The SRS is not designed to operate as a
result of:
• Rear impacts.
• Minor front impacts.
• Minor side impacts.
• Heavy braking.
• Driving over bumps and pot holes.
Therefore, it follows that considerable
superficial damage to the vehicle can occur
without causing the airbags to deploy.

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Airbags

1. Driver's airbag.

2. Front passenger airbag.

3. Seat mounted side airbags.

4. Curtain airbags.

5. Knee-bolster airbag.

E82660

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4

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WARNINGS

High speed impacts may cause serious
injury or death irrespective of safety
features fitted to a vehicle. Always

drive with caution and consideration for the
vehicle's characteristics, road and weather
conditions, and do not exceed any speed limits
in force.

Seat belts should be worn at all times,
by the driver and passengers in all
seating positions. The airbag SRS

cannot provide protection in some types of
impact. Under these circumstances the only
protection will be provided by a correctly worn
seat belt.

Airbags inflate at high speeds, and can
cause injuries. To minimise the risk of
injury, ensure that all vehicle

occupants wear correctly positioned seat
belts, sit correctly in the seats, and position
the seats as far back as practical.

Ensure that a gap is maintained
between the side of the vehicle, and the
head and torso. This will enable

unobstructed inflation of the curtain, and seat
mounted side airbags.

Airbag inflation takes place
instantaneously, and cannot protect
against the effects of secondary

impacts. Under these circumstances the only
protection will be provided by a correctly worn
seat belt.

WARNINGS

Supplementary restraints system

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Note: The location points of airbags fitted to
the vehicle are marked by the word AIRBAG
embossed into the trim.

Always contact your Land Rover
Dealer/Authorised repairer if :-
• An airbag inflates.
• The front or sides of the vehicle are

damaged.

• Any part of the SRS shows signs of

cracking or damage, including trim
covering airbags.

Airbag operation

Airbags cannot deploy correctly if they are
obstructed. Examples of obstructions are :-
• Any part of an occupants body in contact

with, or close to, an airbag cover.

• Objects placed on, or close to, an airbag

cover.

• Clothing, sun screens, or other material

hanging from grab handles.

• Clothing, cushions, or other material,

covering seat mounted airbags.

• Seat covers which are not approved by

Land Rover, or specifically designed for
use with seat mounted airbags.

This list is not exhaustive, and it remains the
responsibility of the driver and passengers to
ensure that the airbags are not obstructed in
any way.

Deployment and deflation

In the event of a collision the airbag control
system monitors the rate, and direction of
deceleration. If required to supplement the seat
belts, airbags will be deployed as appropriate.

Front airbags

The front passenger's, and driver's airbags are
able to deploy in two stages depending on the
severity of the frontal impact. In a severe
impact the airbags inflate fully to offer
maximum protection. In a lesser impact full
deployment is not required, so the airbags are
partially inflated.

Side and curtain airbags

Side and curtain airbags are designed to offer
increased protection for the torso and head in
a side impact. The curtain airbags deflate at a
slower rate than the front, or side airbags to
afford greater protection from serious head
injuries.

Phone systems should only be
installed by qualified persons familiar
with the operation of, and

requirements for, vehicles fitted with SRS. If
you are in any doubt, seek advice from your
Land Rover Dealer/Authorised repairer.

WARNINGS

For the airbags to operate correctly the
roof lining and door post trims must
be in good condition, correctly fitted,

and free from obstruction. Any damage, wear,
or incorrect fitment should be referred to your
Land Rover Dealer/Authorised repairer as
soon as possible for examination and repair.

Do not allow passengers to obstruct
the operation of the airbags by placing
any part of their person, or any

objects, in contact with, or close to, an airbag
module. Airbags deploy at very high speeds,
and can cause serious injury or death if objects
or occupants are within the area of
deployment.

WARNINGS

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Airbag deployment effects

AIRBAG WARNING LAMP

The airbag warning indicator is
mounted in the instrument pack,
and will illuminate as a bulb check

when the ignition is turned on.

If any of the following warning indicator
conditions occur, the vehicle should be
checked by your Land Rover Dealer/Authorised
repairer immediately.
• The warning indicator fails to illuminate

when the ignition is turned on.

• The warning indicator fails to extinguish

within six seconds of the ignition being
turned on.

• The warning indicator illuminates at any

time other than the bulb check, when the
ignition is turned on.

WARNINGS

When an airbag inflates a fine powder
is released. This is normal, and not an
indication of a malfunction. However,

the powder may cause irritation to the skin,
and should be throughly flushed from eyes,
and any cuts or abrasions.

After inflation some airbag
components are at high temperatures.
To prevent injury, do no touch the

airbag components until they have cooled.

In order to react with sufficient speed,
airbags are deployed by an explosive
charge. Consequently airbag

deployment is accompanied by a very loud
noise which may cause discomfort and
temporary loss of hearing.

WARNING

If the warning indicator signals that a
fault is present in the system, do not
use a child restraint on the front

passenger seat. Doing so will increase the risk
of death or serious injury to the child.