1-5 Event Data Recorder (EDR) System 51 1 Safety Data Element Meaning Purpose Time to first stage, frontal airbag, front passenger Elapsed time from the begin- ning of the event (T 0) to the first-stage deployment command for the frontal airbag for the front passenger To analyze the time taken to deploy the frontal airbag for the front passenger (first stage) at the time when the crash event occurred Time to second stage, frontal airbag, front passenger Elapsed time from the begin- ning of the event (T 0) to the second-stage deployment command for the frontal airbag for the front passenger To analyze the time taken to deploy the frontal airbag for the front passenger (second stage) at the time when the crash event occurred Time to deploy, side airbag, front passenger Elapsed time from the begin- ning of the event (T 0) to the deployment command for the side airbag for the front passenger To analyze the time taken to deploy the side airbag for the front passenger at the time when the crash event occur- red Time to deploy, side curtain airbag, front passenger Elapsed time from the begin- ning of the event (T Time) to the deployment command for the side curtain airbag for the front passenger To analyze the time taken to deploy the side curtain airbag for the front passenger at the time when the crash event occurred Alarm status, occupant protection system Alarm status of the occupant protection system, applicable to vehicles having this alarm status transmitted to the CAN bus To analyze the alarm status of the occupant protection system at the time when the crash event occurred Alarm status, tire pressure monitoring system Alarm status when the onboard tire pressure monitor- ing system detected that one or more tires had low pressure, applicable to vehicles having this alarm status transmitted to the CAN bus To analyze the alarm status of the tire pressure monitoring system at the time when the crash event occurred Alarm status, braking system Fault status of the braking system, applicable to vehicles having this alarm status trans- mitted to the CAN bus To analyze the alarm status of the brake system at the time when the crash event occur- red