Discovery 2. Manual — part 7

GENERAL INFORMATION

03-21

WARNING: Do not use a multimeter or other
general purpose test equipment on SRS system
components or accidental deployment may
occur. Use only Testbook to diagnose system
faults.

SRS harnesses and connectors

Always observe the following precautions with
regard to SRS systems:

l

Never attempt to modify, splice or repair SRS
wiring. SRS wiring can be identified by a special
yellow outer protective covering (black with
yellow stripe protective coverings are
sometimes used).

l

Never install electronic equipment (such as a
mobile telephone, two way radio or in-car
entertainment system) in such a way that it
could generate electrical interference in the
airbag harness. Seek specialist advice when
installing such equipment.

CAUTION: Always ensure the SRS harness is
routed correctly. Avoid trapping or pinching the
SRS harness. Look out for possible chafing
points.

CAUTION: Ensure all SRS harness connectors
are mated correctly and securely fastened. Do
not leave the connectors hanging loose.

CAUTION: Do not allow the airbag module to
hang by the airbag harness.

GENERAL INFORMATION

03-22

Rotary coupler
Always follow the Repair procedure for fitting the
rotary coupler.

Comply with all safety and installation procedures to
ensure the system functions correctly. Observe the
following precautions:

l

Do not install a rotary coupler if it is suspected to
be defective.

l

Do not attempt to service, modify or repair a
rotary coupler.

l

Do not cut, splice or modify the wires attached
to yellow SRS connector and lead.

l

Always ensure the rotary coupler connectors
are mated correctly and securely fastened.

l

Always ensure the battery is disconnected
before working on the rotary coupler.

l

Always ensure the rotary coupler is removed
and installed in its centered position and with the
front road wheels in the straight ahead position.

l

If a new rotary coupler is being installed, ensure
the locking tab holding the coupler's rotational
position is not broken; units with a broken
locking tab should not be used.

Warning labels
Warning symbols are displayed at various positions
in the vehicle (either in a suitable prominent position
such as driver and passenger side glass, or attached
to the component itself) to indicate SRS items which
must be treated with particular care. Exact positions
of SRS warning labels may vary dependent on
legislation and market trends.

WARNING: It is imperative that before any work
is undertaken on the SRS system the appropriate
information is read thoroughly.

Side window label

a The need for caution when working in close

proximity to SRS components.

b Refer to the publication where the procedures,

instructions and advice can be found (usually
the Workshop Manual) for working on the SRS
system.

c Do not use rear facing child seats in the front

passenger seat if the vehicle is fitted with a
passenger airbag.

Rotary coupler label

a Refer to the Workshop Manual for detailed

instructions

b Ensure wheels are in the straight ahead

position before removal and refitting

c Part number/Bar code. The code must be

recorded and quoted for ordering purposes

GENERAL INFORMATION

03-23

Airbag and pretensioner deployment
Deployment procedures and precautions as detailed
in this manual should be strictly adhered to. Only
personnel who have undergone the appropriate
training should undertake deployment of airbag and
pretensioner modules. The following precautions
must be complied with:

l

Only use deployment equipment approved for
the intended purpose.

l

Before beginning deployment procedure,
ensure deployment tool functions properly by
performing the self test procedure detailed in
SRS section of this manual.

l

Deployment of airbag/ pretensioner modules
should be performed in a well ventilated area
which has been designated for the purpose.

l

Ensure airbag/pretensioner modules are not
damaged or ruptured before attempting to
deploy.

l

Notify the relevant authorities of intention to
deploy airbag and pretensioner units.

l

When deploying airbag pretensioner units,
ensure that all personnel are at least 15 metres
(45 feet) away from the deployment zone.

l

Ensure deployment tool is connected correctly,
in compliance with the instructions detailed in
the SRS section of this manual. In particular,
ensure deployment tool is NOT connected to
battery supply before connecting to airbag
module connector.

l

When deploying seat belt pretensioners, ensure
pretensioner unit is secured correctly to the
seat.

l

When removing deployed airbag modules and
pretensioner units, wear protective clothing.
Use gloves and seal deployed units in a plastic
bag.

l

Following deployment of any component of the
SRS system within the vehicle, all SRS
components must be replaced. DO NOT re-use
or salvage any parts of the SRS system.

l

Do not lean over airbag module when
connecting deployment equipment.

If a vehicle is to be scrapped, undeployed airbag
modules and pretensioner units must be manually
deployed. In this case airbags can be deployed in the
vehicle; before deployment, ensure the airbag
module is secure within its correct mounting position.
Deployment of the driver's airbag in the vehicle may
damage the steering wheel; if the vehicle is not being
scrapped, deploy the module outside of the vehicle.

WARNING: During deployment parts of the
airbag module become hot enough to burn you.
Wait 30 minutes after deployment before
touching the airbag module.

SRS Component Replacement Policy

The following information details the policy for
replacement of SRS components; either as a result
of a vehicle accident or as a result of vehicle age.

Impacts which do not deploy the airbags or pre-
tensioners
Check for structural damage in the area of the
impact, paying particular attention to bumper
armatures, longitudinals, crash cans and bracketry.

Impacts which deploy the airbags or pre-
tensioners
The replacement and inspection policy is dependent
on the type and severity of of the crash condition.
The following guidelines are the minimum that
should be exercised as a result of the deployment of
specific SRS components.

If the front airbags or seat belt pre-tensioners are
deployed, the following parts must be replaced:

l

SRS DCU.

l

Driver airbag module

l

Passenger airbag module

l

Front seat belt buckle pre-tensioners

l

Rotary coupler

l

Driver's seat belt retractor

l

Flyleads (where applicable) connecting airbags
and seat belt pre-tensioners to SRS harness

In addition, the following should be inspected for
damage and replaced as necessary:

l

Front passenger's seat belt retractor (webbing,
tongue latching, 'D' loop, body anchorage point)

l

Rear seat belt buckles (webbing, buckle covers,
body anchorage and tongue latching function)

l

Fascia moulding adjacent to passenger airbag
module

l

Steering wheel (if damage is evident)

l

Front seat frames and head restraints (if there is
evidence of damage to the seat frame or
cushion pan)

l

Steering column (if adjustment is lost or there
are signs of collapse)

l

Third row seats, seat belts and head restraints
(where fitted). Check third row seat latching
mechanism operates correctly.

Periodic replacement of SRS components
The performance of the propellants within airbags
and pre-tensioners will deteriorate over a period of
time. As a result, it is essential that the airbags are
replaced after 10 years and seat belt pre-tensioners
are replaced after 15 years in order to maintain
occupant safety.

GENERAL INFORMATION

03-24

Air Conditioning System Precautions

General
The air conditioning system contains fluids and
components which could be potentially hazardous to
the service engineer or the environment if not
serviced and handled correctly. The following
guidelines are intended to alert the service engineer
to potential sources of danger and emphasise the
importance of ensuring the integrity of the Air
Conditioning operating conditions and components
fitted to the vehicle.

Where necessary, additional specific precautions are
detailed in the relevant sections of this Manual which
should be referred to prior to commencing repair
operations.

The refrigerant used in the air conditioning system is
HFC-134a (Hydrofluorocarbon) R134a.

WARNING: Servicing must only be carried out by
personnel familiar with both the vehicle system
and the charging and testing equipment. All
operations must be carried out in a well
ventilated area away from open flame and heat
sources.

WARNING: R134a is a hazardous liquid and when
handled incorrectly can cause serious injury.
Suitable protective clothing, consisting of face
protection, heat proof gloves, rubber boots and
rubber apron or waterproof overalls, must be
worn when carrying out operations on the air
conditioning system.

Remedial actions
If an accident involving R134a should occur, conduct
the following remedial actions:

l

If liquid R134a enters the eye, do not rub it.
Gently run large quantities of eye wash over
affected eye to raise the temperature. If an eye
wash is not available, cool, clean water may be
used to flush the eye. After rinsing, cover the
eye with a clean pad and seek immediate
medical attention.

l

If liquid R134a is splashed onto the skin, run
large quantities of water over the affected area
to raise the temperature. Implement the same
action if the skin comes in contact with
discharging cylinders. Wrap the contaminated
body parts in blankets (or similar materials) and
seek immediate medical attention.

l

If the debilitating effects of inhalation of R134a
vapour is suspected, seek fresh air. If the
affected person is unconscious, move them
away from the contaminated area to fresh air
and apply artificial respiration and/or oxygen
and seek immediate medical attention.

WARNING: Due to its low evaporating
temperature, R134a must be handled with care.
R134a splashed on any part of the body will
cause immediate freezing of that area. Also,
refrigerant cylinders and replenishment trolleys
when discharging will freeze skin to them if
contact is made.