Vehicle fault online diagnosis method and system

Abstract

The invention relates to a vehicle fault on-line diagnosis method and system, and the method comprises the steps: a control unit executes self-diagnosis, converts a fault code and a fault code state into a CAN message, and transmits the CAN message to a vehicle-mounted terminal if the fault code is generated or the fault code state is changed; the vehicle-mounted terminal judges whether the fault code is a hard wire type fault code or a CAN bus type fault code, if the fault code is a hard wire type fault, the CAN message associated with the fault code is not collected, whether the duration of the hard wire type fault reaches a preset time threshold value or not is continuously judged, and if yes, the vehicle-mounted terminal packs the fault code and uploads the packed fault code to the cloud platform. After the whole vehicle fault code is reported on line, the fault code can be accurately and comprehensively analyzed, the real situation of the fault can be systematically approved, then an early warning prompt is given to a vehicle owner, and through the process, the sense of confidence of the vehicle owner is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle fault diagnosis, and particularly relates to an on-line diagnosis technology for vehicle faults. Background technique [0002] With the development of automotive intelligent networking technology, vehicle diagnostic information is gradually being monitored online and in real time, so that fault information can be discovered and maintained in a timely manner. [0003] The Chinese patent document with publication number CN112947372A discloses a technology called "a remote diagnosis method based on active reporting of fault codes". In this technology, each electronic control unit actively reports fault code data based on self-diagnosis and uploads it to the background. The server parses and stores, and finally transmits it to the intelligent diagnosis APP for diagnosis. At the same time, it can remotely pull the associated diagnosis data (data identifier, extension frame and freeze frame) to provide ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method and system for on-line diagnosis of vehicle faults to solve the technical problem: after the vehicle fault codes are reported online, the analysis of the fault codes is inaccurate and incomplete, and the real situation of the faults is not systematically approved, that is, to the owner Carry out early warning prompts, causing distrust of car owners and reducing the sense of experience

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