Vehicle fault detection method and system and vehicle

Abstract

The invention provides a vehicle fault detection method and system and a vehicle. The vehicle fault detection method comprises the following steps: when a vehicle is powered off, monitoring message data of a plurality of nodes in a first CAN network segment; judging whether the message data of the plurality of nodes comprise sleep response setting identifiers or not; and if not, recording the message data of the corresponding node in the first CAN network segment. According to the fault detection method for the vehicle, the data generated when the vehicle sends the non-dormant fault is recorded, the troubleshooting difficulty of the accidental non-dormant fault is reduced, the troubleshooting time of after-sales service is shortened, and therefore the maintenance time and the maintenance cost are reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle fault detection method, system and vehicle. Background technique [0002] With the continuous increase of vehicle CAN (Controller Area Network, Controller Area Network) bus network nodes, the probability of CAN bus failures is increasing, most of which are failures such as vehicle failure to start, vehicle non-sleep, etc., but the most difficult failures to deal with It is an occasional failure, that is, when the maintenance personnel inspect the vehicle, the previous failure cannot be reproduced. [0003] At present, the use of the data recording function of the gateway is to avoid data loss caused by occasional failures, and solve the problem of difficult troubleshooting of occasional failures in vehicle network communication. The gateway used respectively collects and stores the vehicle data of the CAN subnet through the data acquisition unit and the data storag...

AI Technical Summary

Problems solved by technology

[0005] Gateway data recording function, the defined data storage time is 72 hours, a large amount of data will be generated during this period, and the gateway must expand a certain storage space, which will greatly increase the cost of the gateway

The data recording function of the gateway only performs troubleshooting for sporadic faults, and does not provide a simple solution for general faults, such as the problem that the vehicle cannot sleep normally, the vehicle cannot start normally, and other bus signal problems, etc.

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