Fault diagnosis device for vehicle

Abstract

Disclosed is a fault diagnosis device for a vehicle capable of rapidly and easily identifying causes of failures (faults) regardless of experience or skill of a repairer even if fault codes of the failures are not recorded. The fault diagnosis device includes a display means, and communicates with an electronic control unit of the vehicle so as to diagnose failures of the vehicle. The fault diagnosis device comprises a selecting means for selecting measurement parameters; a setting means for setting triggering conditions used for measuring the measurement parameters; a failure-by-failure setting means that displays a group of failure conditions of the vehicle on the display means such that a set of measurement parameters corresponding to a failure condition selected from the group of the failure conditions and a triggering condition used for measuring the set of the measurement parameters can be set in a collective manner; and a measurement result processing means that displays the measurement results of the measurement parameters on the display means such that the measurement results can be compared.

Description

technical field [0001] The present invention relates to a device for diagnosing vehicle faults, and more particularly, to a device for communicating with an electronic control unit of a vehicle to obtain measurement results of parameters related to the operation of the vehicle and to identify the cause of the vehicle fault. Background technique [0002] Japanese Patent No. 2,589,617 describes an apparatus for diagnosing a fault in a vehicle, which responds to a diagnosis result (fault code) from an electronic control unit on a vehicle having self-diagnosis capability, for diagnosing a fault that would reproduce while the vehicle is stationary, Displays a selection of work procedures that will be performed while the vehicle is stationary for a fault diagnosed that is reproducible only when the vehicle is in motion. [0003] Japanese Patent Application Publication No. 2004-199500 discloses an inspection apparatus for a work machine that displays selected possible failure items...

AI Technical Summary

Problems solved by technology

[0008] Therefore, if the technique described in Japanese Patent Application Publication No. 2004-199500 is used to display possible causes of failure and sensor groups related to the corresponding causes, less experienced repairers will find it difficult to select appropriate causes of failure and sensors

The above prior art references do not include a setting for selectively displaying trigger conditions for parameters to be measured

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