AIR BAG SYSTEM
08–10–4
SAS CONTROL MODULE CONSTRUCTION/OPERATION
CHU081057030S03
Front Air Bag System (2-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 degree 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 degree 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 degree 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.
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 signal is sent to the pre-
tensioner seat belts.
No.
Degree of collision
force
Air bag module
deployment force
Inflator deployment pattern
1 Large Large Inflator No.1 and inflator No.2 deploy.
2 Small Small Inflator No.1 deploys.
CRASH ZONE SENSOR
SAS CONTROL MODULE
INFLATOR NO.1
INFLATOR NO.2
DRIVER OR PASSENGER-
SIDE AIR BAG MODULE
PRE-TENSIONER
SEAT BELT
CRASH
SENSOR
SIGNAL
AMPLIFICATION
CIRCUIT
OUTPUT
CONTROL
CIRCUIT
CRASH
SENSOR
B6U0810S005
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