车载诊断系统在新能源汽车故障维修中的应用研究

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中图分类号：U469.7 收稿日期：2026-01-28 DOI：10.19999/j.cnki.1004-0226.2026.04.025

Application Research of On-board Diagnostic Systems in New Energy Vehicle Fault Maintenance

Yang Haifeng Xuyi Secondary Specialized School of Jiangsu Province（Xuyi Technician Colege），Xuyi 211700，Chin：

Abstract：Takingnewenergyvehiclesastheresearchobject，thispaperintroduces theconceptandkeycomponentsoftheonboarddiagnosticsystem，includingelectroniccontrolunits，sensorsandactuators，andthediagosticlinkcoectorBasedonthree typicalcases—failuretoreadBMSfaultcodes，high-voltageinterlockfaults，ndinsulationfaultsasegmentedtroubleshootingpath is establisedcordingtoDTCindicationsandchangesinstateparameters，andacosed-lopverificationisachevedtroughresca/ clearingofcodesandrecoveryoftheREADYstate.Theresultsshowthatthismethodcanshortenfaultconvergencetimeandimprove fault localization efficiency and maintenance consistency.

Keywords：On-board diagnostic system;New energyvehicles;Fault maintenance

1前言

随着新能源汽车电动化与智能化水平持续提升，整车控制器、动力电池管理系统及高压用电部件的耦合程度显著增强，车辆上电与行驶许可状态往往由多控制单元协同判定。（剩余4586字）