| 摘要 |
PROBLEM TO BE SOLVED: To provide a freeze frame data storage system for achieving both of improvement in reliability of freeze frame data and reduction of a load in a communication bus.SOLUTION: A freeze frame data storage system includes: slave ECUs 10A, 10B, 10C that sequentially acquire a state value representing a state of a vehicle; and a master ECU 40 able to communicate with the slave ECUs via a communication bus 30. The slave ECU includes a transmitting means 13c for transmitting state data representing the state value and change rate data that can specify the change rate of the state value to the communication bus at a predetermined cycle. The master ECU includes: an estimating means 45d for estimating a state value at a time when abnormality occurs, based on the state data and the change rate data transmitted from the slave ECU; and an abnormality time storing means 45b for storing the data representing the estimated state value as freeze frame data in a nonvolatile memory device 42. |
