Seat Position Matching Deployment Control; Seat Belt Buckled/Unbuckled Condition Matching (Deployment) Control; Seat Track Position Sensor Function - Mazda RX-8 2004 Service Highlights

Seat Position Matching Deployment Control

• The SAS control module controls the air bag deployment operation pattern (deploying only inflator No.1 or both
inflator No.1 and No.2) according to the seat track position of the driver's seat.
• The SAS control module detects the seat track position based on the seat position signal received from the
seat track position sensor.
• When the driver's seat is in a forward position, the SAS control module deploys only inflator No.1 to lessen the
air bag module deployment force.
Seat position
A
B

Seat Belt Buckled/Unbuckled Condition Matching (Deployment) Control

• The SAS control module detects the buckled or unbuckled condition of the front driver-side and passenger-side
seat belts based on a signal received from the front buckle switch. Based on this signal, the necessary air bag
system deployment is controlled according to the impact profile (speed) range.
• When the SAS control module detects that the front driver-side or passenger-side seat-belt is unbuckled, it
lowers the minimum specified value of the impact profile (speed) for high-output deployment (inflators No.1 and
No.2 deploy simultaneously). This means that the SAS control module controls deployment so that in a
collision with an impact profile which normally does not lead to high-output deployment (inflators No.1 and No.2
deploy simultaneously) of the air bag modules, the corresponding air bag will deploy if either one of the front
seat belts is unbuckled.
INFLATOR
NO.1 AND NO.2
INFLATOR
DEPLOYMENT
INFLATOR NO.1
End Of Sie

SEAT TRACK POSITION SENSOR FUNCTION

• The seat track position sensor converts the seat position into an electrical signal and sends it to the SAS
control module.
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08–10–6
AIR BAG SYSTEM
Normal control (only inflator No.1 deploys or both inflator No.1 and No.2 deploy)
Only inflator No.1 deploys
Air bag module deployment control
SEAT TRACK POSITION
SENSOR
A
B
SEAT BELT UNBUCKLED
PRE-TENSIONER SEAT BELT
REAR
FRONT
CHU0810S002
SEAT BELT BUCKLED
IMPACT FORCE
CHU0810S020
CHU081057030S02