In-vehicle electronic apparatus and diagnostic system

Abstract

When any one of multiple driving informational parameters has shown a predetermined change in a determination process, an in-vehicle electronic apparatus sets 1 to a change history provided per each driving informational parameter. When the change history of any one of the driving informational parameters is 1 in the storage process, the in-vehicle electronic apparatus determines that any one of the driving informational parameters has shown the predetermined change between the previous process and current process. Then, the in-vehicle electronic apparatus stores a current time as a change time in a corresponding area provided in an RAM to the driving informational parameter that has shown the predetermined change and sets the change history to 0. When the predetermined vehicle behavior occurs, the in-vehicle electronic apparatus stores, in an SRAM or EEPROM, the change time stored in the RAM and an occurrence time when the predetermined vehicle behavior occurs.

Dependencies are inferred from the claim text.