欢迎来到天天文库
浏览记录
ID:42923673
大小:2.58 MB
页数:42页
时间:2019-09-25
《流媒体平台及编码》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、汽车专业英语Unit7DiagnosticScanToolandOscilloscope第七单元故障诊断仪和示波器7-1DiagnosticScanTool(#1)故障诊断仪KingtecDiagnosticSystem金德故障诊断仪,金德故障诊断系统Tech2=Tech2ScanTool#1diagnostictesterTECH2故障诊断仪TouchPanelTypeTester触摸屏式故障诊断仪,触摸屏式测试仪VAS5051=Vehiclediagnostic,testingandinformationsystem5051(大众公司)5051型车辆诊断、测
2、试和信息装置WhatIsHand-heldTester?TheDTCsthatarestoredintheECUcanbedisplayedonahandheldtesterbyestablishingcommunicationdirectlywiththeECU.Inaddition,thehand-heldtestercancleartheDTCsfromtheECU’smemory.Thehand-heldtesterprovidesotherfunctionssuchasdisplayingtheinformationdatabycommunicatin
3、gwiththeECUbyvarioussensors,orservingasavoltmeteroranoscilloscope.7-2Tech2ScanToolTech2故障诊断仪(#1)①softkey软键②selectkey选择键③actionkey作用键④functionkey功能键YES是,可以ENTER进入,键入EXIT退出NO不SHIFT转换PWR=power电源WhatIsDiagnosis?Theon-boarddiagnosticsystemisthevehicle’sself-diagnosisfunctionthatisprovide
4、dbytheECU(ElectronicControlUnit).Uponreceivingthesignalsfromthesensorsthatdetecttheconditionsofthevehicle,theECUtransmitssignalstotheactuatorsoptimallyforthecurrentconditions.TheECUreceivessignalsfromthesensorsintheformofvoltage.TheECUcandeterminetheconditionsofthesystembydetectingth
5、echangesinthevoltageofthesignalsthatareoutputbythesensors.Thus,theECUconstantlymonitorstheinputsignals(voltage),comparesthemtothestandardvaluesthatarestoredintheECU’smemory,anddeterminesanyabnormalconditions.Thegraphontheleftshowsthecharacteristicsofawatertemperaturesensor.Normally,t
6、hevoltageofthewatertemperaturesensorshouldvarybetween0.1Vand4.8V,ifavoltagewithinthisrangeisinput,theECUdeterminesthattheconditionisnormal.Ifitisashortcircuit(theinputvoltageislessthan0.1V)oranopencircuit(theinputvoltageismorethan4.8V),theECUdeterminesthatitisabnormal.IftheECUdetermi
7、nestheinputsignaltobeabnormal,theECUilluminatestheMIL(MalfunctionIndicatorLight)toalertthedriverandstoresaDTC(DiagnosticTroubleCode)initsmemory.7-3TouchPanelTypeTesterOperation触摸屏式故障诊断仪操作一.设定菜单SETUPMENU(#1)1、CLOCK/CALENDAR2、PRINTERBAUD3、PRINTERSELECT4、UNITCONVERSION5、BRANDSELECT6、DAT
8、ABASESELECT7
此文档下载收益归作者所有