Audi Q7 2017 Manual page 19

Installation location of the lap belt tensioner
The lap belt tensioners are bolted into place on the 'B'
pillars.
Diagnostics
The lap belt tensioner is a pyrotechnic component. The
safety instructions are the same as for other pyrotechnic
components. The lap belt tensioner is damaged when
ignited and has to be replaced as a unit.
Buckle
The difference between this safety belt buckle and a
"regular" safety belt buckle is that it locks the belt in the
event of an accident which matches the criteria for deploy-
ment. The result is a load path for the thorax region and a
load path for the pelvic region, with all the aforementioned
benefits for the occupants.
Reference
For further information about the function of the lap belt tensioner and buckle, please see eSelf-Study Program
990143, The 2015 Audi A3
Lug engaged
in the 'B' pillar
Lap belt tensioner
On left hand side
of the vehicle
637_046
Introduction.
Coupling
The safety belt is deflected in the area of the 'B' pillar and is
able to move upwards. A coupling is stitched to the end of
the safety belt. The lap belt tensioner coupling is inserted
into the safety belt coupling and clipped into place. To
insulate against noise, a foam pad is installed in the cou-
pling area.
Airbag Control Module J234 continuously monitors the lap
belt tensioners for proper functioning and will enter a DTC
if faults are detected.
Lap belt tensioner
Steel cable of the
lap belt tensioner
Coupling
Foam pad
Seat belt join
Belt deflector
637_047
637_048
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