Seat Position Matching Deployment Control; Seat Belt Buckled/Unbuckled Condition Matching (Deployment) Control - Mazda CX-9 2007 Service Highlights

Seat Position Matching Deployment Control

• The SAS control module controls the air bag deployment operation pattern (deployment 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 or seat-belt is unbuckled, it
lowers the minimum specified value of the impact profile (speed) for high-output deployment (inflator No.1 and
No.2 deploy). This means that the SAS control module controls deployment so that in a collision with an impact
profile which normally dose not lead to high-output deployment (inflator No.1 and No.2 deploy) 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
AIR BAG SYSTEM
Driver-side air bag module deployment control
Normal control (only inflator No.1 deploys or both inflator No.1 and No.2 deploy)
Only inflator No.1 deploys
SEAT TRACK POSITION
SENSOR
REAR
FRONT
B
SEAT BELT UNBUCKLED
PRE-TENSIONER SEAT BELT
A
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SEAT BELT BUCKLED
IMPACT FORCE
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08-10–9
08-10