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. 03, 2000
Filed:
Feb. 25, 1997
Applicant:
Inventor:
Satoshi Ishii, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
701 29 ; 701 33 ; 34082506 ; 34082516 ;
Abstract
A diagnosis system for diagnosing malfunctions of on-vehicle electronic control units (ECU) includes a plurality of ECUs and a diagnostic tester. The ECUs are connected to one another, thereby forming a communications network. The ECUs store a data related to malfunctions. A diagnostic tester is connected to an engine ECU for reading the data stored in the ECUs. The tester transmits an initialization signal at a low speed to the ECU when starting communicating with one of the ECUs. The ECU selects a transmission rate between the ECU and the tester based on the initialization signal.