SAS CONTROL MODULE FUNCTION

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Sensing function

• The following sensors are built into the SAS control module.

  ― Crash sensor
  ― Low-G (YZ) sensor
  ― Roll rate sensor
  ― Yaw rate sensor
  ― Low-G (XY) sensor

Crash sensor

  • If the degree of impact detected by the crash zone sensor and the crash sensor built into the SAS control module exceeds the set value during a frontal collision to the vehicle, the SAS control module sends an operation (deployment) signal to the air bag module and the pre-tensioner seat belts.
  • If the degree of impact detected by side air bag sensor No. 1 or No. 2 and the crash sensor built into the SAS control module exceeds the set value during a side collision to the vehicle, the SAS control module sends an operation (deployment) signal to the side air bag module and curtain air bag module.

Low-G (YZ) sensor

  • The Low-G (YZ) sensor in the SAS control module detects the vehicle lateral and vertical accelerations, and the detected accelerations are used for a rollover control determination.

Roll rate sensor

  • The roll rate sensor in the SAS control module detects the vehicle rolling angle speed, and the detected speed is used for a rollover control determination. In addition, the detected speed is sent to the DSC/RSC HU/CM via special CAN lines between the SAS control module and the DSC/RSC CM.

Yaw rate sensor

  • The yaw rate sensor in the SAS control module detects the vehicle yaw rate (vehicle turning angle speed), and sends the detected rate to the DSC/RSC HU/CM via special CAN lines between the SAS control module and the DSC/RSC CM.

Low-G (XY) sensor

  • The low-G (XY) sensor in the SAS control module detects the vehicle longitudinal and lateral accelerations, and sends the detected accelerations to the DSC/RSC HU/CM via special CAN lines between the SAS control module and the DSC/RSC CM.

Backup Power Supply Function

• The backup power supply function enables the condenser to discharge and supply power to assure air bag system operation/deployment properly for a specified time even if the power supply to the SAS control module is cut due to a collision.

Configuration Function

• Identifies the variation of the air bag module installed to the vehicle when replacing the SAS control module with a new one.
• If the air bag module installed to the vehicle and the module identified by the SAS control module differ, a DTC is displayed.
• Refer to the Workshop Manual for the configuration setting procedure.