Communication network for vehicle control and diagnosis method t

Details Communication network for vehicle control and diagnosis method t Communication network for vehicle control and diagnosis method t

1997-02-06

2000-06-13

Hofsass, Jeffery A.

Communications: electrical

Systems

340506, 340438, 307 91, G08B 2300

Patent

active

060754389

ABSTRACT:
A communication network for vehicle control and a method of diagnosing the same in which the self-diagnosis functions attributed to some of control units in the communication network are combined with a manual diagnosis operation, whereby the diagnosis can be carried out by a relatively simple arrangement without sacrificing readiness and correctness, thus ensuring higher cost performance and reliability. The communication network includes control units, each coupled to at least one of auxiliary input and output devices, connected with communication lines to one another for transmitting and receiving unique signals. Each of at least two of the control units includes a transmitter, a receiver, a controller, and an indicating means, and has a diagnosis function. In a diagnosis mode, a receiver of the control unit with the diagnosis function upon receiving the unique signal from another control unit examines whether the unique signal is normal or not, and whether an input signal received from the auxiliary input device connected thereto is authentic or not. On the basis of the results of examination, the control unit determines the presence of fault in the communication network and energizes the indicating means in a corresponding manner.

REFERENCES:
patent: 5525959 (1996-06-01), Przybyla et al.
patent: 5670939 (1997-09-01), Rodewald et al.

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