Abnormality detecting device for vehicle communication system an

Details Abnormality detecting device for vehicle communication system an Abnormality detecting device for vehicle communication system an

1994-10-04

1996-10-15

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082510, 36442403, 370 13, 371 201, G01M 1500

Patent

active

055658563

ABSTRACT:
The present invention provides an abnormality detecting device for a vehicle communication system comprising controllers and a diagnosis unit. The controllers store data to be transmitted by means of a communication IC to the diagnosis unit. When data is transmitted to a bus at a first timing, a communication abnormality, if any, around the communication IC is detected in response to the status of data stored in the communication IC at a second timing by a CPU. The CPU determines as an abnormality a case where, after transmission of data from the communication IC to the bus, the data is kept stored in the communication IC. The CPU determines as an abnormality a case where, after transmission of part of data to the communication IC, no data is stored in the communication IC.

REFERENCES:
patent: 4597052 (1986-06-01), Matsuda et al.
patent: 5005129 (1991-04-01), Abe et al.
patent: 5056023 (1991-10-01), Abe

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