DIAGNOSTIC DEVICE OF TROUBLE IN VEHICLE

Title:

DIAGNOSTIC DEVICE OF TROUBLE IN VEHICLE

Document Type and Number:

Japanese Patent JPS5820539

Kind Code:

A

Abstract:

PURPOSE: To speedily process a trouble, by counting a number of turn-on times of a display lamp and easily checking a diagnostic result, when a checker as an external device is not connected to a control unit built in with a trouble diagnostic device.

CONSTITUTION: A self diagnostic device 12, generating an output by discriminating a trouble corresponding to each sensor from a detecting signal of various sensors and prescribed diagnostic reference, is provided to a control unit 10, and data of the trouble are set to a prescribed address determined in accordance with each trouble location of an ROM14. While a selector circuit 30, detecting existence of a checker 24 connected as an external device and switching a data transfer speed, is provided to the unit 10, when the checker 24 is not connected, the speed is switched to a prescribed transfer speed visible with flickering of light emitting diode 46 as a trouble display means. A content of the flickering of said light emitting diode 46 is checked, and where a trouble to be caused can be decided.

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Inventors:

TOGASHI MINORU
KISHI NORIMASA
TAKEDA HITOSHI
YAMAKI KIYOSHI

Application Number:

JP11936981A

Publication Date:

February 07, 1983

Filing Date:

July 31, 1981

Export Citation:

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