ELECTRIC HEATING DEVICE FOR VEHICLE

摘要

An electric heating device for a vehicle may comprise: a switch element configured to allow an electric current to flow through an electric heater; a switch element control unit generating a switch element control signal and a switch element drive signal; and a switch element drive unit driving the switch element with the switch element drive signal. The switch element control unit generates a new switch element control signal based on a switch element function diagnosis signal for diagnosing an abnormality in the switch element or in the switch element drive unit and on a switch element functional abnormality detection signal that includes an indication of a presence or an absence of the abnormality. The switch element control unit generates a new switch element drive signal based on the new switch element control signal and on the switch element function diagnosis signal.