CAN bus fault diagnosis method and system

The invention relates to a CAN bus fault diagnosis method and system. The method comprises the steps that A) a control command is emitted, and present CAN bus data communication is stopped; B) a pre-determined current is output to a CAN bus circuit; C) the voltage value at the two ends of a terminal...

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Bibliographische Detailangaben
Hauptverfasser:	LUO SHIFENG, CHEN ZULIANG, XIE XIUFEN
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	The invention relates to a CAN bus fault diagnosis method and system. The method comprises the steps that A) a control command is emitted, and present CAN bus data communication is stopped; B) a pre-determined current is output to a CAN bus circuit; C) the voltage value at the two ends of a terminal resistor in the CAN bus circuit is collected; and D) when the voltage value is greater than a first or second preset threshold, a connected circuit of the terminal resistor is determined to be abnormal. The method and system can automatically diagnose faults of the terminal resistor.