Abnormality detection method and system having sleep mode...

Details Abnormality detection method and system having sleep mode... Abnormality detection method and system having sleep mode...

2005-10-25

2005-10-25

Nguyen, Brian (Department: 2661)

Multiplex communications

Diagnostic testing

C370S311000, C340S438000, C340S506000, C340S901000, C701S031000, C701S034000

Reexamination Certificate

active

06958976

ABSTRACT:
A plurality of electronic control units is continuously supplied with electric power to be capable of communication one another even when respective controlled devices are in inoperative condition. Each ECU transmits a sleep NG information along with its device ID when it not allowed to remain in the sleep mode. An abnormality detection unit connected to the ECUs through communication lines monitors the sleep NG information of each ECU to detect the ECU remaining activated for more than a wait period which is required for the ECU to shift to the sleep mode. The device ID of the ECU which is detected as remaining activated is stored in a memory so that any abnormal location may be specified by the stored device ID.

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