Diagnostic method and apparatus for vehicle having communication

Details Diagnostic method and apparatus for vehicle having communication Diagnostic method and apparatus for vehicle having communication

1998-12-09

2000-05-23

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

701 29, 701 30, 701 31, 340438, 3404255, 340439, 340539, B60Q 100

Patent

active

060670096

ABSTRACT:
In a diagnostic method and apparatus for a vehicle, a transponder for performing a communication with an external receiver and an engine ECU are connected on a communication line. During a first inappropriate period in which noises are supposed to occur on the communication line due to engine starting or a second inappropriate period in which a processing load necessary for a control is supposed to be high when the engine speed is high or a load is high, even if there is a request for outputting abnormality information from the transponder, the engine ECU does not respond to the request. On the other hand, when it is not during the first and second inappropriate periods, the ECU responds to the output request from the transponder.

REFERENCES:
patent: 5157610 (1992-10-01), Asano et al.
patent: 5729452 (1998-03-01), Smith et al.
patent: 5908455 (1999-06-01), Parvahan
patent: 5941918 (1997-07-01), Blosser

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