Land Rover Discovery: Supplementary Restraint System ( SRS ) Precautions
WARNING:
Do not install rear facing child seats in the front passenger seat.
The SRS contains components which are potentially hazardous to service
personnel if not handled correctly. The following guidelines and precautions
are intended to alert personnel to potential sources of danger and
emphasise the importance of ensuring the integrity of the SRS components
installed to the vehicle.
WARNING:
The following precautions MUST be adhered to when working on the
SRS system:
- The correct procedures must always be used when working on SRS
components.
- Persons working on the SRS system must be fully trained and
have
been issued with the safety guidelines.
- The airbag modules contain extremely flammable and hazardous
compounds. Contact with water, acids or heavy metals may produce
harmful or explosive results. Do not dismantle, incinerate or bring into
contact with electricity before the unit has been deployed.
- Always replace a seat belt assembly that has withstood the
strain of a
severe vehicle impact or if the webbing shows signs of fraying.
- Always disconnect the vehicle battery before carrying out any
electric
welding on a vehicle installed with an SRS system.
CAUTION:
Do not expose airbag modules or seat belt pre-tensioners to
temperatures exceeding 85º C (185º F).
It should be noted that these precautions are not restricted to operations
performed when servicing the SRS system. The same care should be
exercised when working on ancillary systems and components located in the
vicinity of SRS components; these include but are not limited to:
- Steering wheel airbag, rotary coupler.
- Passenger front airbag.
- Side curtain airbag modules - front and rear.
- Seat belt pre-tensioners.
- SRS harnesses, link leads and connectors.
- Side (thorax) air bags.
Making the system safe
Before working on or in the vicinity of SRS components, make sure the
system is rendered safe by performing the following operations:
- Remove the remote control.
- Disconnect battery, earth lead first.
- Wait 2 minutes for the SRS power circuit to discharge before commencing
work.
NOTE:
The SRS uses energy reserve capacitors to keep the system active in
the event of electrical supply failure under crash conditions. It is
necessary to allow the capacitors sufficient time to discharge (2
minutes) in order to avoid the risk of accidental deployment.
Installation
In order to make sure system integrity, it is essential that the SRS system
is
regularly checked and maintained so that it is ready for effective operation
in the event of a collision. Carefully inspect SRS components before
installation. Do not install a part that shows signs of being dropped or
improperly handled, such as dents, cracks or deformation.
WARNING:
The integrity of the SRS systems is critical for safety reasons.
Make
sure the following precautions are always adhered to:
- Do not install accessories or other objects to trim panels
which cover
airbags.
- Never install used SRS components from another vehicle or
attempt to
repair an SRS component.
- When repairing an SRS system, only use genuine new parts.
- Never apply electrical power to an SRS component unless
instructed to
do so as part of an approved test procedure.
- Special fixings are necessary for installing an airbag module -
do not
use other fixings.
- Always use new fixings when replacing an SRS component and make
sure that all fixings are tightened to the correct torque.
CAUTIONS:
- Take care not to trap airbag modules when installing interior trim
components.
- Make sure SRS components are not contaminated by oil or grease.
NOTES:
- Following seat belt pre-tensioner deployment, the seat belts can
still be used as conventional seat belts but will need to be replaced
as soon as possible to make sure full SRS protection. Do not use the
seat belts if the retraction mechanism is not working correctly.
- If the SRS components are to be replaced, the part number/bar
code of the new unit must be recorded.
SRS component testing precautions
The SRS components are triggered using relatively low operating currents,
always adhere to the following :
WARNING:
Never use a multimeter or other general purpose equipment on SRS
components. Use only Land Rover approved diagnostic equipment to
diagnose system faults.
WARNING:
Do not use electrical test equipment on the SRS harness while it is
connected to any of the SRS components, it may cause accidental
deployment and injury.
Handling and storage
Always observe the following precautions when handling SRS components:
WARNINGS:
- When handling a side curtain airbag module, hold by the gas
generator housing, DO NOT hold by the airbag. Do not wrap the
thumb around the gas generator while holding. Do not drape
airbag over shoulder or around neck. For seat buckle type pretensioners,
hold by the piston tube, with the open end of the piston
tube pointing towards the ground and the buckle facing away from
your body. Do not cover the end of the piston tube. DO NOT hold
buckle type pre-tensioners by the bracket assembly or cable. Never
point the piston tube towards your body or other people.
- Airbag modules and seat belt pre-tensioners are classed as
explosive devices. For overnight and longer term storage, they
must be stored in a secure steel cabinet which has been approved
as suitable for the purpose and has been registered with the local
authority.
- Store airbag modules or seat belt pre-tensioners in a
designated
storage area. If there is no designated storage area available, store
in the locked luggage compartment of the vehicle and inform the
workshop supervisor.
CAUTION:
Improper handling or storage can internally damage the airbag
module making it inoperative. If you suspect the airbag module has
been damaged, install a new module and refer to the
deployment/disposal procedures for disposal of the damaged
module.
SRS harness and connectors
Always observe the following precautions with regards to SRS system
electrical wiring:
- Never attempt to modify, splice or repair SRS wiring.
- Never install electrical 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.
NOTE:
SRS wiring can be identified by a special yellow outer sleeve
protecting the wires (black with yellow stripe protective coverings are
sometimes used).
WARNING:
Always make sure SRS wiring is routed correctly. Be careful to avoid
trapping or pinching the SRS wiring.
WARNING:
Do not leave the connectors hanging loose or allow SRS components
to hang from their harnesses. Look for possible chafing points.
Side impact crash sensor inspection
After any degree of side body damage, inspect the side impact crash
sensors. Replace a crash sensor if there is any sign of damage.
CAUTION:
Take extra care when painting or carrying out bodywork repairs in the
vicinity of the crash sensors. Avoid direct exposure of the crash
sensors or link harnesses to heat guns, welding or spraying
equipment. Take care not to damage sensor or harness when
reinstalling components.
Clock spring
CAUTION:
Always follow the procedure for installing and checking the clock
spring as instructed in the SRS repairs section. Comply with all safety
and installation procedures to make sure the system functions
correctly. Observe the following precautions:
- Do not unlock and rotate the clock spring when it is removed from the
vehicle.
- Do not turn the road wheels when the clock spring is removed from the
vehicle.
- Always make sure the clock spring is removed and installed in its
central
position and with the front road wheels in the straight ahead position -
refer to SRS repair section for the correct removal and installation
procedure.
- If a new clock spring is being installed, make sure the locking tab
holding
the coupler's rotational position is not broken; units with a broken locking
tab must not be used.
READ NEXT:
WARNING:
During deployment parts of the airbag module become hot enough
to burn you. Wait 30 minutes after deployment before touching the
airbag module.
Deployment procedures and precautions as detail
CAUTION:
If the front airbags are deployed, the following components must be
replaced:
Driver airbag module
Steering wheel
Passenger airbag module
Instrument panel
Fly leads (where applicable) c
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 guidelin
SEE MORE:
SPECIAL TOOL(S)
GENERAL EQUIPMENT
PART(S)
Removal
CAUTION:
Nuts and bolts must be tightened with the weight of the vehicle on
the suspension.
NOTE:
Some variation in the illustrations may occur, but the essential
information is always correct.
All vehicles
WARNING:
Make sure to support
In the interest of safety, only
operate, adjust or view the
system when it is safe to do so.
Sustained exposure to high sound
levels (greater than 85 decibels)
can damage your hearing.
Touch to select the Media system; or
if the Media system is already switched
on, touch to select the