汽车专业英语 教学课件 作者 宋进桂汽车专业英语课件-section 2Chapter 7-1.4&7.2.ppt

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1、Chapter7CommonSpecialServiceToolsandEquipments7.1FunctionsofDiagnosticEquipments7.2OperationofOTCEnhancedMonitorscantoolChapter7CommonSpecialServiceToolsandEquipments7.1FunctionsofDiagnosticEquipmentsNewWordstechnician[tek'niʃən]n.技术人员，技师diagnosis[¸daiəg'nəusis]n.诊断，诊断结果，诊断书capture['kæpt∫ə]v.捕

2、获，夺得，记录，拍摄coupling['kʌpliŋ]n.结合，耦合，联接器misadjusted[¸misə'dʒʌstid]a.失调的，误调的spike[spaik]n.长而尖的东西，尖端电压，峰值slope[sləup]n.倾斜，坡度，斜面，斜率upslope['ʌp¸sləup]n.上坡Chapter7CommonSpecialServiceToolsandEquipments7.1FunctionsofDiagnosticEquipmentsNewWordsdownslope['daunsləup]n.下坡；a.下坡的commutator['kɔmjuteitə]n.换向

3、器，整流子premature[¸premə'tjuə]a.早期的，过早的quenching['kwentʃiŋ]n.猝熄，淬熄problematic[¸prɔbli'mætik]a.问题的，疑难的，不确定的scanner['skænə]n.扫描仪，诊断仪pinoutn.引线，接脚分布Chapter7CommonSpecialServiceToolsandEquipments7.1FunctionsofDiagnosticEquipments7.1.4ScanToolsAscantool(orscanner)isprobablythemostfamiliartooltoanyonew

4、orkingwithtoday’scomputerizedsystems.Figures7–25showsatypicalscantool.However,itisimportanttorecognizethedistinctabilitiesofascantool.PurposeCodePulling.Ascanner’sabilitytopullcodesincludesbothpullingDTCsfromacomputer’smemoryandcausingthecomputertoperformaself-testofthesystemanddisplaytheresul

5、tingDTCs.Chapter7CommonSpecialServiceToolsandEquipments7.1FunctionsofDiagnosticEquipmentsFigure7–25AtypicalscantoolthatcanbeusedtoretrievedatastreaminformationfromthePCM.FunctionalTests.ScantoolscanalsobeusedtoperformfunctionaltestsSomescantoolmanufacturersrefertothesetestsasspecialtests.Thepr

6、imaryandbest-knownfunctionaltestistheactivecommandmode,inwhichthescantoolisabletocommandon-boardcontrolmodulestoperformcertainactions,suchasenergizingacoolingfanrelayoracanisterpurgeventsolenoid.Acommonuseofsuchatestistohelpthetechnicianquicklynarrowaproblemdowntotheinputsideortheoutputsideoft

7、hecomputer.Forexample,iftheelectriccoolingfandoesnotcomeonduringnormalvehicleoperation,resultinginanover-heatingconditionoftheengine,ascantoolmaybeusedtocommandthePCMtoenergizethecoolingfanrelay.Chapter7CommonSpecialServiceToolsandEquip