Vehicle fault diagnosis method and system, and vehicle

Abstract

The invention provides a vehicle fault diagnosis method. The vehicle fault diagnosis method comprises the following steps: a whole vehicle controller can be used to receive fault messages transmitted by a plurality of part electronic controllers; the whole vehicle controller can be used to analyze the fault information of the plurality of part electronic controllers, and the fault information comprises fault symbols; the whole vehicle controller can be used to manage the fault information of the plurality of part electronic controller, and can be used to determine whether the time of receiving one fault symbol reaches the predetermined value in an accumulated manner, when yes, the fault information can be recorded; a diagnosis tool can be used to read the fault information of a plurality of part electronic controllers from the whole vehicle controller. According to the vehicle fault diagnosis method, the whole vehicle controller can be used for the unified management of the vehicle faults, and the after-sales maintenance of the vehicle can be facilitated. The invention also provides a vehicle fault diagnosis system.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle fault diagnosis method, system and vehicle. Background technique [0002] In related technologies, automobile OEMs are responsible for fault management of vehicle controllers, and suppliers are responsible for fault management of component electronic controllers. However, component suppliers have uneven fault management development levels, and it is difficult to unify and standardize them. The after-sales diagnosis service of the new energy vehicles of the OEM brings inconvenience. [0003] The fault diagnosis design of a single automotive electronic controller includes three aspects, the diagnosis strategy on the control, the fault management layer, and the diagnosis protocol stack. For the management of fault information such as fault status, the diagnostic protocol stack is responsible for exchanging digital information with diagnostic tools and sending fault in...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the first solution is that each controller supplier is responsible for the after-sales service of its own controller, which is inconvenient for the unified management of after-sales service of automobile OEMs

The disadvantage of the second solution is that it is difficult for automobile OEMs to standardize and require the fault management of controller suppliers. In addition, controller suppliers have insufficient understanding of fault management, resulting in uneven development levels of component electronic controller fault management.

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