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SAS CONTROL MODULE CONSTRUCTION/OPERATION

id081000101100

## Air Bag Module and Pre-tensioner Seat Belt Deployment Operation

### 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 sensor 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.

No. | Degree of collision force | Air bag module deployment force | Inflator deployment pattern
--- | --- | --- | ---
1 | Large | 100 % | Inflator No.1 and inflator No.2 deploy.
2 | Small | 60-80 % | Inflator No. 1 deploys.

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.

### Side air bag system

1. During a lateral collision to the vehicle, the crash sensors in the side air bag sensor and SAS control module detect the collision.

2. The degree of impact detected by the crash sensor in the side air bag sensor is converted to an electrical signal and sent to the SAS control module through the signal amplification circuit.

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 a side air bag module and curtain air bag module ignition circuit, and sends the deployment signal to the air bag modules.

## Module configuration

### Function

  • Module configuration is performed to provide an initial setting for the SAS control module according to the actually equipped air bag module and pre-tensioner seat belt.
  • If there is a mismatch between the air bag system configuration and the initial setting for the SAS control module, a DTC is displayed.
  • The module configuration is performed using only the SST (WDS or equivalent).