Starter-relay control circuit with self fault diagnosis...

Details Starter-relay control circuit with self fault diagnosis... Starter-relay control circuit with self fault diagnosis...

2007-12-25

2007-12-25

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

11109955

ABSTRACT:
In a starter-relay control circuit, a high-side switching element is connected between a first output line connected to a high-side terminal and an ignition power line connected to the ignition switch. A low-side switching element is connected between a second output line connected to a low-side terminal and a ground line connected to a negative terminal of the battery. A pull-up element is connected between the ignition power line and the first output line. A pull-down element is connected between the ground line and the second output line. A failure detecting unit is connected to the first and second output lines and configured to determine whether a failure wherein the high-side terminal is short-circuited to the positive terminal of the battery occurs based on a voltage of the second output line when the ignition switch is in an off position.

REFERENCES:
patent: 3859540 (1975-01-01), Weiner
patent: 5379733 (1995-01-01), Haddick et al.
patent: 6148781 (2000-11-01), Boegner et al.
patent: 8-261119 (1996-10-01), None
patent: 2000-145491 (2000-05-01), None
patent: 2004-84655 (2004-03-01), None

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