In-vehicle electronic control unit, diagnosis tool and diagnosis system

摘要

An in-vehicle electronic control unit (ECU), stores behavior information, when a specific vehicle behavior (i.e. a vehicle behavior that does not correspond to the driver's driving operation) is detected. The in-vehicle electronic control unit (ECU) stores, as the behavior information, vehicle travel information, a storage time of the vehicle travel information, and storage execution information that indicates that the vehicle travel information is stored. When the engine of the vehicle stops, the ECU first executes an abnormality check of a CPU operation, when, based on the storage execution information of the behavior information, the vehicle travel information is stored. The ECU stores, as abnormality check information, an abnormality check result, an execution time of the abnormality check, and check execution information indicating that the abnormality check has been executed, and after the storage of the abnormality check information, the ECU stops power supply to the CPU.

主权项

1. An in-vehicle electronic control unit installed in a vehicle comprising:
a central processing unit (CPU) executing a vehicle control process; a behavior check unit determining whether a specific vehicle behavior is detected; a behavior information storage unit storing in a memory unit, which retains data during a drive stop time of the vehicle, vehicle travel information as a behavior information of the vehicle when the behavior check unit determines a specific vehicle behavior is detected, the drive stop time being defined as a time at which an engine of the vehicle is shutdown and the engine has an engine speed of zero; an abnormality check unit executing an abnormality check to determine whether an operation of the CPU is abnormal during a time period after the storage of the vehicle travel information in the memory unit by the behavior information storage unit and between the drive stop time of the vehicle and a shutting off of a power supply to the CPU; and a check result storage unit storing in the memory unit an abnormality check result of the abnormality check unit as an abnormality check information.