Mazda 2002 Millenia Spezifikationen PDF herunterladen (Seite 305)

AIR BAG SYSTEM

T89

SAS UNIT

A6E813057030T01

Outline

• A 2-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.

• Based on the module configuration, operation (deployment) matching the actual type of air bag module or pre-

tensioner seat belt setting variation can be controlled. If the module configuration is incomplete or incorrect, the

on-board diagnosis function displays a DTC. (See T97 ON-BOARD DIAGNOSTIC FUNCTION.) If the SAS

unit is replaced, it is necessary to perform the module configuration to match the specifications of the vehicle in

which it is being installed. Refer to the Workshop Manual for the procedure.

Air Bag Module and Pre-tensioner Seat Belt Deployment Operation

Front air bag system (2-step deployment controlj

1. During a frontal or frontal offset collision, the crash sensors in the crash zone sensor and the SAS unit detect

the impact.

2. The degree of impact detected by the crash sensor in the crash zone sensor is converted to an electric signal

and sent to the SAS unit.

3. Simultaneously, the SAS unit crash sensor converts the degree of impact detected to an electrical signal.

4. The SAS unit 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.

: To scrap the air bag module, inflator No. 2 is deployed.

6. The SAS unit 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 100 % Inflator No.1 and inflator No.2 deploy simultaneously.

2 Small 60 % Inflator No. 1 deploys, then inflator No.2*.

A6E8130T005

1 SAS unit

2 Crash zone sensor

3Crash sensor

4 Signal amplification circuit

5 Output control circuit

6 Front air bag module (driver or passenger-side air

bag module)

7 Inflator No.1

8 Inflator No.2

9 Pre-tensioner seat belt

1 2 ... 300 301 302 303 304 305 306 307 308 309 310 ... 357 358

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