L322 Range Rover System Description and Operation
RESTRAINT SYSTEMS
DESCRIPTION AND OPERATION
75-5
Description
General
Restraints consist of seat belts at each seat position and a Supplementary Restraint System (SRS) in the form of
airbags and seat belt pretensioners.
Seat Belts
The seat belts are all three point inertia reel belts. The front seat belts incorporate load limiters and have height
adjusters on the B/C post. The outer rear seat belts have height adjusters on the D post.
On NAS vehicles, all passenger seat belts are the Automatic Locking Retractor (ALR) type for use with child restraint
systems.
A seat belt warning lamp and associated message are activated on the instrument pack, by the Light Check Module
(LCM), at the beginning of each ignition cycle as a reminder to fasten seat belts.
ISO child seat fixings are installed on the back of each outer rear seat.
SRS
The SRS activates pretensioners and/or airbags if the vehicle suffers an impact above preset limits. When it activates
the pretensioners/airbags the SRS also disconnects the starter lead from the battery. The SRS consists of:
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A Diagnostic Control Unit
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Two side impact sensors
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A seat occupancy sensor
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A seat occupancy module
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Seat belt switches (NAS only)
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Seat belt pretensioners
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A driver airbag
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A passenger airbag
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Side airbags
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Front head airbags
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Rear head airbags
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A battery disconnect unit
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The rotary coupler
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A warning lamp.
The SRS features selective activation of the airbags and pretensioners, and two stage driver and passenger airbags.
The driver and passenger airbags each have two gas generators which are fired sequentially, with a variable time
delay between firings to adjust the speed of airbag inflation to the severity of the crash impact.