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Fault diagnosis apparatus for mounting on a vehicle

  • US 5,111,686 A
  • Filed: 02/19/1991
  • Issued: 05/12/1992
  • Est. Priority Date: 02/26/1990
  • Status: Expired due to Term
First Claim
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1. A fault diagnosis apparatus for mounting on a vehicle, comprising:

  • operating condition detecting means for detecting operating conditions of the vehicle;

    abnormal condition memory means for memorizing an occurrence of an abnormal condition of the vehicle;

    vehicle operating condition memory means for storing the operating conditions when the abnormal condition occurs in the vehicle;

    reproduction mode instruction means for instructing to execute an abnormal condition reproduction test mode;

    operating condition comparison means for comparing current vehicle operating conditions in the abnormal condition reproduction mode set by said instruction means with vehicle operating conditions at the time of abnormality occurrence; and

    notifying means for notifying a result of said comparison of vehicle operating conditions.

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