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

  • US 9,008,898 B2
  • Filed: 04/19/2012
  • Issued: 04/14/2015
  • Est. Priority Date: 04/22/2011
  • Status: Active Grant
First Claim
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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.

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