Communications: electrical – Land vehicle alarms or indicators
Reexamination Certificate
2008-01-01
2008-01-01
Tweel, Jr., John (Department: 2612)
Communications: electrical
Land vehicle alarms or indicators
C340S428000, C701S029000
Reexamination Certificate
active
07315236
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.
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Kawamura Atsushi
Shiraishi Naoyuki
Sugimoto Terumitsu
Yanagida Yo
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Tweel , Jr. John
Yazaki -Corporation
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