MG MG6 Series 2011 Service Manual page 917

Seat Belts
Front Seat Front Front Seat Belt Seat Belt Belt Pre-tensioners Pre-tensioners Pre-tensioners
During a collision, the front seat belts are tightened using a
pre-tensioner to ensure the occupants are restrained and any
loose seat belt webbing is pulled in. The pre-tensioner units
are integral with the seat belt inertia reel assemblies, which
are fixed to the vehicle B/C posts by Torx bolts. Electrical
connection to the main harness is provided through 2-pin
connectors that are secured to the body.
During a collision, the seat belt pre-tensioners are activated
by a signal from theSRS ECU. The fixing mode and work
principle of the two pre-tensioner inertia reel are the same.
Every pre-tensioner is equipped a igniter and propeller, which
is effected on the pre-tensioner inertia reel.
Rear seat belt is not equipped with pre-tensioner.
Warning: Once the pre-tensioner has been operated, it
cannot be reset. The gas generator will be exhausted. The
unit must be replaced.
Seat Belts
An inertia reel, three-point seat belt is installed at each front
seat position. The inertia reels are of the Emergency Locking
Retractor(ELR) type, which incorporate a locking system
reacting to webbing and car sensors. The webbing sensor
activates the locking system if the webbing is subjected to a
sharp pull. The car sensor activates the locking system if the
vehicle is subjected to sudden deceleration or a severe tilt
angle such as in the event of a crash.
Version 2.0
The inertia reel adds a locking mechanism, which has woof
sensor and vehicle sensor. If the woof is pulled suddenly, the
woof sensor will start the locking equipment immediately. If
the vehicle decelerate suddenly or lange-angle incline, vehicle
sensor will start the locking equipment immediately.
Traction will locked when the crash is happened, all front
seat belt traction equipment are equipped with load limit
equipment. if the load limit is over the critical level, The woof
will relax by the load limit equipment. so the load on the
passenger will reduce.
Front Seat Belts
The inertia reel of each front seat belt is attached to the body
in a cavity at the base of each B/C post behind the lower B/C
post trim. A locating tag on the seat belt unit mates with a
slot on the B/C post, and a bolt at the base of the unit secures
the seat belt to the body. The seat belt webbing runs from the
inertia reel, through a webbing guide within the vehicle trim to
a guide in a manual height adjuster at the upper B/C post to an
anchor point at the base of the B/C post.
The height adjuster is attached to the upper B/ C post by one
screw and hook on the rail and the webbing runs through a
'D-loop' which is attached to the adjuster by a stud and nut.
The stud part of the mechanism can slide up and down the
adjuster to provide the required seat belt setting The buckle
assembly for each seat belt is attached to a bracket on the
inboard side of each seat frame.
Safety and Restraints
901