Monitoring circuit for an ABS warning lamp
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United States of America Patent
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-
Aug 25, 1998
Grant Date -
N/A
app pub date -
Feb 6, 1997
filing date -
Feb 8, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A monitoring circuit for detecting a malfunctioning warning lamp circuit includes a first device for monitoring the voltage within the warning lamp circuit and a second device for monitoring the current through the warning lamp circuit. Each of the monitoring devices has an output which is connected to a decision device. The first device generates a first output signal when the monitored voltage is greater than a predetermined voltage and a second output signal when the monitored voltage is less than the predetermined voltage. The second device generates a first output signal when a current flows through the lamp and a second output signal when there is no current flowing through the lamp. The decision device is responsive to the output signals from the monitoring devices to generate a failure signal when the warning lamp circuit malfunctions.
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