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SUPPLEMENTARY RESTRAINT SYSTEM (SRS)
21
SRS
At straight ahead position of the clock spring, the
arrow mark on the rotor & housing will match as
shown in the below image which is the home po-
sition of clock spring.
Assemble the clock spring in this position.
11.1.6.2.5 RPLL BELTS
RETRACTOR PRETENSIONER LOAD LIMITOR
Seatbelt pre-tensioner is a device installed in vehi-
cles to reduce slack that may exist in a seatbelt sys-
tem at the moment of a frontal collision. Having the
seatbelt system snug allows the supplemental re-
straint airbag system to work most effectively. A
loose seatbelt system does not keep the occupant in
the proper position during the forces of a crash. In
order for airbags to reduce or eliminate injury, the
occupant must be seated, belted and in the correct
position in the vehicle.
Pretensioner device is mounted in the retractor unit.
The Pretensioner unit essentially consists of a ball
cage comprising of a tube of steel balls surrounding
a toothed wheel. The wheel is mounted on the belt-
webbing spool.
When the ECU senses a crash, depending on the
crash severity, it sends a "fire" signal to the squib in
the belt Pretensioner. The firing of the squib causes
displacement of the balls in the tube. The movement
of the balls causes rotation of the toothed wheel,
which in turn rotates the webbing spool and removes
the slack from the belt.