AIR BAG SYSTEM

id081000500100

Outline

Warning

•  The air bag system supplements the occupant protection function of the seat belts, however the intended effect of the air bag system cannot be obtained if the seat belts are not fastened correctly. When driving the vehicle, always fasten the seat belts correctly.

Function

System conditions display function

•  The air bag system detects each part condition and the SAS control module sends the system status signal to the instrument cluster.

•  The instrument cluster notifies the user of the system conditions using the following warning light or alarm based on the system condition signal.

Warning light and alarm	Reference
Air bag/seat belt pre-tensioner system warning light	(See AIR BAG/SEAT BELT PRE-TENSIONER SYSTEM WARNING LIGHT.)
Air bag system warning alarm	(See AIR BAG SYSTEM WARNING ALARM.)
Seat belt warning light	(See INSTRUMENT CLUSTER.) (See INDICATOR UNIT.)

Structural View

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System Wiring Diagram

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Operation

Collision from front of vehicle or frontal offset

1.  When an impact from a frontal or frontal offset collision (1) is received, the crash sensor built into the crash zone sensor and the crash sensor (2) built into the SAS control module detect the impact and convert the impact into an electrical signal at the signal processing circuit (3).

2.  The SAS control module calculates (6) the degree of impact using the determination and safing circuit (5) based on the electric signal (4) from each crash sensor.

3.  If the calculated degree of impact exceeds the previously set threshold, the SAS control module outputs (8) an operation (deployment) signal to each air bag module or pre-tensioner seat belt at the output control circuit (7).

4.  Each air bag module or pre-tensioner seat belt operates (deploys) (9) based on the operation (deployment) signal from the SAS control module.

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Collision from side of vehicle (With pressure sensor)

1.  When an impact (1) from a lateral collision is received, the following sensors (2) detect the impact and convert the impact or the pressure into an electrical signal at the signal processing circuit (3).

―  Crash sensor integrated into side air bag sensor

―  Crash sensor integrated into SAS control module

―  Pressure detection sensor integrated into pressure sensor

2.  The SAS control module calculates (6) the degree of impact using the determination and safing circuit (5) based on the electric signal (4) from each crash sensor or the pressure detection sensor.

3.  If the calculated degree of impact exceeds the previously set threshold, the SAS control module outputs (8) an operation (deployment) signal to each air bag module or pre-tensioner seat belt at the output control circuit (7).

4.  Each air bag module or pre-tensioner seat belt operates (deploys) (9) based on the operation (deployment) signal from the SAS control module.

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Collision from side of vehicle (Without pressure sensor)

1.  When an impact from a lateral collision (1) is received, the crash sensor built into the side air bag sensor and the crash sensor (2) built into the SAS control module detect the impact and convert the impact into an electrical signal at the signal processing circuit (3).

2.  The SAS control module calculates (6) the degree of impact using the determination and safing circuit (5) based on the electric signal (4) from each crash sensor.

3.  If the calculated degree of impact exceeds the previously set threshold, the SAS control module outputs (8) an operation (deployment) signal to the side air bag module or pre-tensioner seat belt at the output control circuit (7).

4.  The side air bag module or pre-tensioner seat belt operates (deploys) (9) based on the operation (deployment) signal from the SAS control module.

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