The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 1996
Filed:
Oct. 04, 1994
Katsumi Takaba, Obu, JP;
Yukihide Niimi, Chita-gun, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
The present invention provides an abnormality detecting device for a vehicle communication system comprising controllers and a diagnosis unit. The controllers store data to be transmitted by means of a communication IC to the diagnosis unit. When data is transmitted to a bus at a first timing, a communication abnormality, if any, around the communication IC is detected in response to the status of data stored in the communication IC at a second timing by a CPU. The CPU determines as an abnormality a case where, after transmission of data from the communication IC to the bus, the data is kept stored in the communication IC. The CPU determines as an abnormality a case where, after transmission of part of data to the communication IC, no data is stored in the communication IC.