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Air bags and seat belt pretensioners
88
DESTRUCTION EQUIPMENT
In order to avoid any risk of an accident the pyro-
technic gas generators for the air bags and seat
belt pretensioners must be triggered before the
vehicle or the part is scrapped.
Tool Elé. 1287 must be used which is provided for
this purpose.
96832R
Refer to "Destruction procedure" section.
IMPORTANT: do not trigger pretensioners which
must be returned under warranty for a stalk pro-
blem. This makes analysis of the component im-
possible for the supplier.
Return the component in the packaging of the
new one.
OPERATION OF PRETENSIONERS AND FRONT AIR
BAGS
When the ignition is switched on, the control war-
ning light for these systems is illuminated for se-
veral seconds and then is extinguished.
The computer is on standby and monitors the de-
celeration of the vehicle using the signal measu-
red by two integral decelerometers.
In the event of a frontal impact of sufficient force,
one of them simultaneously triggers the pyrote-
chnic generators for the two seat belt pretensio-
ners.
Under the force of the gas generated by the sys-
tem, a piston moves in its cylinder pulling a cable
connected to a corresponding central buckle
which retracts the seat belt (see the
"Pretensioners" section).
If the frontal impact is greater, the second elec-
tronic decelerometer triggers the ignition of the
pyrotechnic gas generators which inflate the dri-
ver and passenger air bags (according to equip-
ment).
These systems will not trigger in the event of:
- a side impact,
- a rear impact.
When triggered, a pyrotechnic gas generator pro-
duces an explosion and a small amount of smoke.
NOTE : the computer and ignition modules supply
normally comes from the vehicle battery.
However, an energy reserve is included in the
computer in case the battery is disconnected at
the start of the impact.
88-8
