초록 ▼

A vehicle diagnostic information storage system includes a volatile storage device such as a backup RAM and a nonvolatile storage device such as EEPROM. If a fault occurs, a control section stores data on fault items, and input and output conditions of sensors of a vehicle control system, in the vol

A vehicle diagnostic information storage system includes a volatile storage device such as a backup RAM and a nonvolatile storage device such as EEPROM. If a fault occurs, a control section stores data on fault items, and input and output conditions of sensors of a vehicle control system, in the volatile storage device and updates the data in the volatile storage device during a vehicle operation. In response to a switching operation of a vehicle main switch such as a turn-on operation of an ignition switch, the control section transfers the most recent version of updated data from the volatile storage device to the nonvolatile storage device.

대표청구항 ▼

[ What is claimed is:] [1.] A fault information storage system for storing fault information on a vehicle control system, comprising:a first storing unit of a battery backup type for storing fault information if a fault occurs, and updating the fault information during a vehicle operation;a second s

[ What is claimed is:] [1.] A fault information storage system for storing fault information on a vehicle control system, comprising:a first storing unit of a battery backup type for storing fault information if a fault occurs, and updating the fault information during a vehicle operation;a second storing unit of a nonvolatile type for storing a most recent version of the fault information in the first storing unit;a control unit for detecting a fault in the vehicle control system, for updating the fault information each time a fault is detected during the vehicle operation from a turn-on of an ignition key switch of the vehicle to a turn-off of the ignition key switch, and for performing a writing operation of writing the most recent version into the second storing unit if the fault information is updated during the vehicle operation, the control unit including a writing unit for performing the writing operation to write the information updated in a previous vehicle operation when the ignition switch is turned on,wherein the writing unit performs the writing operation again if the ignition switch is turned off during the writing operation.