Vehicle diagnostic data storing system
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United States of America Patent
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Oct 12, 1999
Grant Date -
N/A
app pub date -
Oct 30, 1997
filing date -
Nov 7, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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