SRS System Description - System Diagram
System Diagram
- Power supply circuit (booster circuit, backup power supply): Provide and maintain power when battery voltage is low or in case of power supply damage due to a collision.
- Front impact G sensors and side impact G sensor: Detects impact to the SRS unit as acceleration and converts it to an electrical signal.
- Rollover judgment circuit: Predict an impending rollover using signals such as the one from the G sensor located inside of the SRS unit. Based on the rollover judgment and the seat belt buckle switch status, the circuit determines whether the seat belt tensioners and the side curtain airbags should deploy or not.
- Yaw rate sensor: Detects yaw rate generated at the time of vehicle turning as vehicle behavior, and the information is transmitted to the other systems via the F-CAN signal.
- Microprocessor: An impact decision algorithm decides whether or not the collision signal warrants deployment of the airbags or the tensioners.
- Diagnostic circuit: Perform self-diagnosis to determine whether system abnormalities are present. If an abnormality is detected, the SRS indicator in the gauge control module turns on.
- Non-volatile memory: Record fault conditions. The SRS memories are not erased even if the 12 volt battery terminal is disconnected.
- Communication circuit: Circuit for outputting or deleting memory contents.
For locations of each component on vehicle, refer to Component Location Index .