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:
Jan. 01, 2008
Filed:
Jul. 19, 2005
Yo Yanagida, Shizuoka, JP;
Naoyuki Shiraishi, Shizuoka, JP;
Atsushi Kawamura, Shizuoka, JP;
Terumitsu Sugimoto, Shizuoka, JP;
Yo Yanagida, Shizuoka, JP;
Naoyuki Shiraishi, Shizuoka, JP;
Atsushi Kawamura, Shizuoka, JP;
Terumitsu Sugimoto, Shizuoka, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
An ECU monitoring device includes a monitoring ECU connected to a power line for supplying power from a main battery to an immobilizer ECU. The monitoring ECU includes a high-frequency signal generating circuit for superimposing a high-frequency signal on the power line, a high-frequency signal detecting circuit for detecting the high-frequency signal superimposed on the power line and a CPU for judging a connection between the power line and the immobilizer ECU or between the power line and a false instrument. With the constitution, the ECU monitoring device can detect a situation that the immobilizer ECU is detached from a vehicle with high accuracy, preventing the vehicle from being stolen by theft.