Subaru 2007 Tribeca - Manual (Page 82)

Seat, seatbelt and SRS airbags
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tem is designed to determine the activa-
tion or deactivation condition of the front
passenger’s SRS frontal airbag depend-
ing on the total load on the front passen-
ger’s seat monitored by the front passen-
ger’s occupant detection system weight
sensor. For this reason, only the driver’s
SRS frontal airbag may deploy in the
event of a collision, but this does not mean
failure of the system.
If the front sub sensors located on both
sides of the radiator panel and the impact
sensors in the airbag control module de-
tect a predetermined amount of force dur-
ing a frontal collision, the control module
sends signals to the airbag module(s)
(only driver’s module or both driver’s and
front passenger’s modules) instructing the
module(s) to inflate the SRS frontal air-
bag(s). The driver’s and front passenger’s
SRS frontal airbags use dual stage infla-
tors. The two inflators of each airbag are
triggered either sequentially or simulta-
neously, depending on the severity of im-
pact, backward-forward adjustment of the
driver’s seat position and fastening/unfas-
tening of the seatbelt in the case of the
driver’s SRS frontal airbag and depending
on the severity of impact and the total load
on the seat in the case of the front passen-
ger’s SRS frontal airbag. After deploy-
ment, the SRS airbag immediately starts
to deflate so that the driver’s vision is not
obstructed. The time required from detect-
ing impact to the deflation of the SRS air-
bag after deployment is shorter than the
blink of an eye.
Both when only the driver’s SRS frontal
airbag deploys and the driver’s and front
passenger’s SRS frontal airbags deploy,
the driver’s and front passenger’s seatbelt
pretensioners operate at the same time.
Although it is highly unlikely that the SRS
airbag would activate in a non-accident
situation, should it occur, the SRS airbag
will deflate quickly, not obscuring vision
and will not interfere with the driver’s abil-
ity to maintain control of the vehicle.
When the SRS airbag deploys, a sudden,
fairly loud inflation noise will be heard and
some smoke will be released. These oc-
currences are a normal result of the de-
ployment. This smoke does not indicate a
fire in the vehicle.
The driver’s SRS frontal airbag and front
passenger’s SRS frontal airbag are de-
signed to deploy in the event of an acci-
dent involving a moderate to severe fron-
tal collision. It is basically not designed to
deploy in lesser frontal impacts because
the necessary protection can be achieved
by the seatbelt alone. Also, they are basi-
cally not designed to deploy in side or rear
impacts or in rollover accidents because
deployment of only the driver’s SRS fron-
tal airbag or both driver’s and front pas-
senger’s SRS frontal airbags would not
help the occupant in those situations. The
driver’s and front passenger’s SRS frontal
airbags are designed to function on a one-
time-only basis.
SRS airbag deployment depends on the
level of force experienced in the passen-
ger compartment during a collision. That
level differs from one type of collision to
another, and it may have no bearing on
Do not touch the SRS airbag system
components around the steering
wheel and dashboard with bare
hands right after deployment. Doing
so can cause burns because the
components can be very hot as a re-
sult of deployment.
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