Subaru 2009 Tribeca User Manual download pdf (Page 79)

The SUBARU advan ced frontal airbag

system is designed to determine the

activation or deactivation condition of the

front passenger’s SRS frontal airbag

depending on the total load on the front

passenger’s seat monitored by the front

passenger’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

detect a predetermined amount of force

during 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 airbag(s). The driver’s and

front passenger’s SRS frontal airbags use

dual stage inflators. The two inflators of

each airbag are triggered either sequen-

tially or simultaneously, depending on the

severity of impact, backward-forward ad-

justment of the driver’s seat position and

fastening/unfastening 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 passenger’s SRS frontal airbag.

After deployment, the SRS airbag imme-

diately starts to deflate so that the driver’s

vision is not obstructed. The time required

from detecting impact to the deflation of

the SRS airbag after deployment is short-

er than the blink of an eye.

When only the driver’s SRS frontal airbag

deploys and both 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

ability 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. The se

occurrences are a normal result of the

deployment. This smoke does not indicate

a fire in the vehicle.

CAUTION

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

result of deployment.

The driver’s SRS frontal airbag and front

passenger’s SRS frontal airbag are de-

signed to deploy in the event of an

accident involving a moderate to severe

frontal collision. It is basically not designed

to deploy in lesser frontal impacts be-

cause the necessary protection can be

achieved by the seatbelt alone. Also, they

are basically not designed to deploy in

side or rear impacts or in rollover acci-

dents because deployment of only the

driver’s SRS frontal airbag or both driver’s

and front passenger’s SRS frontal airbags

would not help the occupant in those

situations. The driver’s and front passen-

ger’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

the visible damage done to the vehicle

itself.

Seat, seatbelt and SRS airbags 1-55

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Subaru 2009 Tribeca User Manual Page 79

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