Mazda 2006 MX-5 Service Highlights page 373

SAS CONTROL MODULE FUNCTION
Outline
• A two-step air bag deployment control system has been adopted. In case of a frontal or frontal offset collision,
an optimal air bag deployment force is matched to the impact force. The inflators for the driver and passenger-
side air bag modules have two tiers, and deploy at either a low or high rate, according to the force of the impact.
• A drip-proof sheet has been installed to the connector for improved waterfroofing.
End Of Sie
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.
CRASH ZONE SENSOR
CRASH
SENSOR
SIGNAL
AMPLIFICATION
CIRCUIT
AIR BAG SYSTEM
Air bag module
deployment force
Large
Small
SAS CONTROL MODULE
OUTPUT
COTROL
CIRCUIT
CRASH
SENSOR
Inflator deployment pattern
Inflator No.1 and inflator No.2 deploy.
Inflator No.1 deploys.
INFLATOR NO.1
FRONT AIR BAG MODULE
(DRIVER OR PASSENGER-
SIDE AIR BAG MODULE)
INFLATOR NO.2
DRIVER OR PASSENGER-SIDE
PRE-TENSIONER SEAT BELT
E5U081057030N01
E5U081057030N02
08–10
C3U0810S601
08–10–5