Sas Control Module Construction/Operation; Front Air Bag System - Mazda CX-9 2007 Service Highlights

SAS CONTROL MODULE CONSTRUCTION/OPERATION

Front Air Bag System (Two-Step Deployment Control)
1. During a frontal or frontal offset collision, the crash sensors in the crash zone sensor and the SAS control
module detect the impact.
2. The level of impact detected by the crash sensors in the crash zone sensor is converted to an electric signal
and sent to the SAS control module.
3. Simultaneously, the SAS control module crash sensor converts the level of impact detected to an electrical
signal.
4. The SAS control module processes the calculations for the two electrical signals at the output control circuit
and compares the value to a preset value.
5. The output control circuit determines the level of impact to the vehicle by the value from the crash sensors,
completes an inflator No.1 or inflator No.2 ignition circuit, and sends the deployment signal to the air bag
modules.
No. Level of collision force
1 Large
2 Small
6. The SAS control module completes an ignition circuit for the pre-tensioner seat belts that is synchronized to the
deployment of the driver and passenger-side air bag modules, and an operation (deployment) signal is sent to
the pre-tensioner seat belts.
08-10–6
AIR BAG SYSTEM
Air bag module
deployment force
Large Inflator No.1 and inflator No.2 deploy.
Small Inflator No.1 deploys.
SAS CONTROL MODULE
CRASH
SENSOR
JUDGEMENT AND
SAFING CIRCUIT
OUTPUT COTROL CIRCUIT
INFLATOR NO.2
DRIVER OR
FRONT AIR BAG MODULE
PASSENGER-SIDE
(DRIVER OR PASSENGER-
PRE-TENSIONER
SIDE AIR BAG MODULE)
SEAT BELT
Inflator deployment pattern
CRASH ZONE SENSOR
CRASH
SENSOR
INFLATOR NO.1
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