Unit8RepairandMaintenanceHotTipUnit8RepairandMaintenanceWriting4Presentation1Passage12Passage23LanguageLab7Extension7Speaking5Translation6Presentation

Automaintenancedescribestheactofinspectingortestingtheconditionofcarsubsystems(e.g.,engine)andservicingorreplacingpartsandfluids.Regularmaintenanceiscriticaltoensurethesafety,reliability,drivability,comfortandlongevityofacar.Duringpreventivemaintenance,anumberofpartsarereplacedtoavoidmajordamageorforsafetyreasons,e.g.timingbeltreplacement.Throughthesepassages,welearnsomeknowledgeofhowtorepairandmaintain.Unit8RepairandMaintenanceHotTipPassage1EngineTroubleshootingEngineoverheatingTherearemanyconditionsoftheautomobilethatresultinoverheating,andthedegreeofoverheatingisindicatedbythetemperaturegaugeontheinstrumentpanel.Someconditionswillcauseonlyaslightchangeintherecordedtemperature,othercauseswillresultinarapidriseintemperatureandviolentboilingofthecoolant.Stillotherswhilecausingonlyaslightincreaseinrecordedtemperature,whilewillbemorenoticeableinengineperformance.翻譯Unit8RepairandMaintenanceHotTipPassage1EngineTroubleshootingWhentroubleshootingthecauseforoverheatingandconsequentlossofcoolant,the1ststepistomakecarefulvisualinspectiontoseeifthereisanyevidenceofexternalleakage.Allsurfacesoftheradiatoranditshoseconnectionsshouldbecarefullyinspected.Leaksgenerallycausecorrosion,whichiseasilyseen.Thevisualinspectionalsomustincludethecoolingfananditsdrivebelt.Itisnottoounusualforcrackstoformintheenginewaterjacket.Whencracksoccur,theconditionisusuallyindicatedbyextremeoverheating.Thecrackisoftendifficulttolocate,becauseitisnotalwaysvisibletothenakedeye.Theconditionisalsocomplicatedbythefactthatthecrackusuallywillclosewhentheengineiscold,andopenonlywhentheengineisatoperatingtemperature.翻譯Unit8RepairandMaintenanceCleaningtheCoolingSystemUnlessveryseverelycloggedwithrustandhardscale,coolingsystemscanbecleanedwithspecialchemicalsdesignedforthepurpose.Theprocedureistofillthesystemwithwater,thenputinthechemical.Thechemical,afterdissolvingtherustandscale,isflushedfromthesystem.Inseverecasesofcloggedradiators,itisnecessarytoremovethemandhavethemcleanedbyspecializedequipment.翻譯Unit8RepairandMaintenancePassage1翻譯HighOilConsumptionQuiteoftenhighoilconsumptionisblamedonthepistonrings.Whilewornpistonringsandcylinderwallsdocauseincreasedoilconsumption,thereareagreatnumberofotherthingsthatcouldbeatfault,eithersinglyorincombination.Wornvalveguidesarealsoafrequentcauseofhighoilconsumption.Whenoilisbeingconsumedbypassingthroughtheengine,itusuallywillcauseheavybluesmoketocomefromtheexhaust,particularlyaftertheenginehasidledforseveralminutes.Unit8RepairandMaintenancePassage1HotTipLowOilPressureInmostcasesoflowoilpressure,thepressureissatisfactorywhentheengineisfirststartedup,thenitdropsastheenginewarmsup.Theconditionisalmostpositiveproofthatexcessiveclearanceexistsatsomepoint,orpoints,suchasconnectingrodbearings,mainbearings,camshaftbearings,etc.whencold,theoilhasthickenedanddoesnotflowasreadilythroughtheclearance.Whentheoilheatsupandthinsout,itflowsthroughthewornbearingssofastthatthepumpcannotmaintainsufficientpressure.翻譯Unit8RepairandMaintenancePassage1Unit8RepairandMaintenanceChassisandEngineVibrationConsiderthecasewherethereisapronouncedvibrationinthecaratacertainspeedrange.Firstofallitisnecessarytodeterminewhethertheunbalanceisintheengineorthechassis,orboth.Ifitisintheengine,orthepartsthatrotatewiththeengine,thevibrationshouldoccuratthecriticalenginespeedwhenthecarisnotinmotion.Ifitisinthechassis,itwilloccuronlywhenthecarisoperatedatthecriticalspeed.Itismostlikelytobefoundinthechassis,becausetheengineassemblyiscarefullybalancedatthefactory.Out-of-balancetiresandpropellershaftsarethemostcommoncausesofchassisvibration.Passage1翻譯HotTiptroubleshooting['tr?bl?u:t??]n.發(fā)現(xiàn)并修理故障overheating[???v?'hi:t??]n.過熱t(yī)emperature[?tempr?t??]n.溫度；體溫；氣溫gauge[ge?d?]n.規(guī)格，尺度，量規(guī)violent[?va??l?nt]adj.劇烈的noticeable[?n??t?s?bl]adj.顯而易見的，值得注意的leakage[?li:k?d?]n.漏，漏出；泄露radiator[?re?die?t?]n.暖氣片，散熱器corrosion[k?'r???n]n.腐蝕，侵蝕，銹蝕crack[kr?k]n.裂縫，裂紋clog[kl?g]v.障礙，阻塞rust[r?st]n.鐵銹NewwordsUnit8RepairandMaintenancePassage1Unit8RepairandMaintenancePassage1Newwordsscale[ske?l]n.水垢dissolve[d?'z?lv]v.溶解；融化consumption[k?n?s?mp?n]n.消費singly[?s??gli]adv.單獨地；單個地idle['a?dl]v.空轉positive[?p?z?t?v]adj.肯定得，確定的clearance[?kl??r?ns]n.空隙，間隙pronounced[pr??na?nst]adj.顯著的，明確的vibration[va??bre??n]n.擺動；震動rotate[r??'te?t]v.旋轉；使轉動critical[?kr?t?kl]adj.臨界的HotTipresultin導致instrumentpanel儀表板pistonring活塞環(huán)valveguide氣門導管connectingrodbearing連桿軸承mainbearing主軸承camshaftbearings凸輪軸承PhrasesandExpressionsUnit8RepairandMaintenancePassage11.Someconditionswillcauseonlyaslightchangeintherecordedtemperature,othercauseswillresultinarapidriseintemperatureandviolentboilingofthecoolant.有些工況會引起發(fā)動機溫度的微小變化，而另外工況則會引起發(fā)動機溫度迅速上升并使得冷卻液劇烈沸騰。2.Theconditionisalsocomplicatedbythefactthatthecrackusuallywillclosewhentheengineiscold,andopenonlywhentheengineisatoperatingtemperature.發(fā)動機冷態(tài)時開裂處閉合，只有在發(fā)動機熱態(tài)時開裂處才開啟，所以尋找開裂處會很復雜。3.Whilewornpistonringsandcylinderwallsdocauseincreasedoilconsumption,thereareagreatnumberofotherthingsthatcouldbeatfault,eithersinglyorincombination.活塞環(huán)和汽缸壁的磨損確實會引起機油消耗過多，但還有很多其他零部件單獨或同時出現(xiàn)故障也會導致機油消耗過多。NotesUnit8RepairandMaintenancePassage14.Theconditionisalmostpositiveproofthatexcessiveclearanceexistsatsomepoint,orpoints,suchasconnectingrodbearings,mainbearings,camshaftbearings,etc.這肯定說明在某處或多處間隙過大，如在連桿軸承，主軸承，凸輪軸承等地方。5.Ifitisintheengine,orthepartsthatrotatewiththeengine,thevibrationshouldoccuratthecriticalenginespeedwhenthecarisnotinmotion.如果震動是在發(fā)動機內產生，則當汽車停止而零件隨著發(fā)動機旋轉時，振動應該在發(fā)動機的某個臨界轉速下產生。NotesUnit8RepairandMaintenancePassage1

TasksWhatarethenormalenginetroublesaccordingtothepassage?Whatisthemainprocedureofcleaningthecoolingsystem?Whatisthemainreasonforhighoilconsumption?Howcanyouidentifythevibrationoccurredinengineorchassis?Unit8RepairandMaintenancePassage1I.Answerthefollowingquestionsaccordingtothepassage.Theyareengineoverheating,cleaningthecoolingsystem,highoilconsumption,lowoilpressure,andchassisandenginevibration.Theprocedureistofillthesystemwithwater,thenputinthechemical.Thechemical,afterdissolvingtherustandscale,isflushedfromthesystem.Quiteoftenhighoilconsumptionisblamedonthepistonrings.Firstofallitisnecessarytodeterminewhethertheunbalanceisintheengineorthechassis,orboth.Ifitisintheengine,orthepartsthatrotatewiththeengine,thevibrationshouldoccuratthecriticalenginespeedwhenthecarisnotinmotion.Ifitisinthechassis,itwilloccuronlywhenthecarisoperatedatthecriticalspeed.

TasksII.TranslatethefollowingexpressionsintoChineseorEnglish.

engineoverheating儀表盤活塞環(huán)

valveguide機油壓力過低

mainbearing

Unit8RepairandMaintenancePassage1發(fā)動機過熱氣門導管主軸承l(wèi)owoilpressureinstrumentpanelpistonring

TasksinspectcleanstartedupindicatepronouncedresultinUnit8RepairandMaintenancePassage1Ⅲ.Completethesentenceswiththegivenwords.Changetheformifnecessary.Someconditionswillcauseonlyaslightchangeintherecordedtemperature,othercauseswill_________arapidriseintemperatureandviolentboilingofthecoolant.Allsurfacesoftheradiatoranditshoseconnectionsshouldbecarefully________Whencracksoccur,theconditionisusually___________byextremeoverheating.resultininspectedindicated

TasksinspectcleanstartedupindicatepronouncedresultinUnit8RepairandMaintenancePassage1Ⅲ.Completethesentenceswiththegivenwords.Changetheformifnecessary.Unlessveryseverelycloggedwithrustandhardscale,coolingsystemscanbe_________withspecialchemicalsdesignedforthepurpose.Thepressureissatisfactorywhentheengineisfirst________,thenitdropsastheenginewarmsup.Considerthecasewherethereisa___________vibrationinthecaratacertainspeedrange.cleanedstarteduppronounced

TasksIV.TranslatethefollowingsentenceintoChinese.

Therearemanyconditionsoftheautomobilethatresultinoverheating,andthedegreeofoverheatingisindicatedbythetemperaturegaugeontheinstrumentpanel.Inseverecasesofcloggedradiators,itisnecessarytoremovethemandhavethemcleanedbyspecializedequipment.Quiteoftenhighoilconsumptionisblamedonthepistonrings.Inmostcasesoflowoilpressure,thepressureissatisfactorywhentheengineisfirststartedup,thenitdropsastheenginewarmsup.Unit8RepairandMaintenancePassage1汽車在很多工況下都會有發(fā)動機過熱現(xiàn)象產生，此時的溫度會在儀表板上的溫度表中顯示。散熱器嚴重阻塞時，可將散熱器拆卸，并用專門的設備對散熱器進行清理。通常認為機油消耗過多歸咎于活塞環(huán)。多數(shù)機油壓力偏低的情況是，發(fā)動機冷啟動時，壓力合格，當發(fā)動機走熱后，壓力下降。HotTipAutomobileMaintenanceMaintenanceisnothingmorethancleaningandwashing,troubleshooting,mounting-parttightening,lubricating,filling,adjustingandotheroperationswhicharecarriedout,asarule,withoutdisassemblingpartsandtakingthemdown.Regulationsdividemaintenanceintoanumberoftypesdependingontheirrecurrence,scopeofworkandlabourrequirementsinvolvedineachparticularcase.Thesetypesare:Dailymaintenance,level1maintenance,level2maintenanceandseasonalmaintenance.翻譯Passage2Unit8RepairandMaintenanceHotTipDailymaintenanceconsistsofcleaningandwashingoperationsandcheckingtheoverallconditionofthecarsoastoensureitssafeoperationandappropriateappearance.Thecariscleanedandwashed,inspected,filledwithfuel,oilandcoolant.Dailymaintenanceistimedwiththebeginningorendofashift.Level1maintenancecallsfortherepeatingofalldailymaintenanceoperationsfollowedbyanumberofadditionaloperationsinvolvingthetighteningofmountingparts,lubricating,inspectingandadjustingofunitsandpartswhichareallcarriedoutwithoutdismountinganddisassemblingthem.Level2maintenancestipulatesarepetitionoflevel1maintenanceinwakeofwhichmoreinspectionsandadjustmentsfollowwhichareextendedinscopeandrequirepartialdisassemblingofunits.Someofthemaretakendownfromthecarandtestedontheteststands.翻譯Passage2Unit8RepairandMaintenanceHotTipSeasonalmaintenanceistimedtobecarriedouttwiceayear,andinvolvedinthiscaseareoperationsassociatedwiththeseasonalchangeover.Seasonalmaintenanceoftencoincides:washingthecoolingsystem,changingthelubricantintheenginecrankcaseandintheoilbathsofotherunits(freshoilofagradeappropriateforthecomingseasonshouldbeused),checkingthefuelsystemandwashingthefueltank.Thecold-startingaidandthecabheateraretestedforperformanceatthebeginningofoperation.翻譯Passage2Unit8RepairandMaintenanceHotTipTheactualscheduleofcarmaintenancevariousdependingontheyear,makeandmodelofacar,itsdrivingconditionsanddrivebehavior.Carmakersrecommendtheso-calledextremeortheidealserviceschedulebasedonimpactparameterssuchas:Numberoftripsanddistancetraveledpertripperday;Extremehotorcoldclimatecondition;Mountainous,dustyorde-icedroadsheavystop-and-govs.long-distancecruising;Towingatrailerorotherheavyload.Experiencedserviceadvisorsindealershipsandindependentshopsrecommendscheduleintervals,whichareofteninbetweentheidealorextremeserviceschedule.Theybaseitonthedrivingconditionsandbehaviorofthecarownerordriver.翻譯Passage2Unit8RepairandMaintenanceHotTipmaintenance['me?nt?n?ns]n.維護，維修troubleshooting['tr?bl?u:t??]n.發(fā)現(xiàn)并修理故障lubricating['lu:br?ke?t??]n.潤滑disassemble[?d?s?'sembl]v.拆卸recurrence[r??k?r?ns]n.再現(xiàn)，循環(huán)inspect[?n'spekt]v.檢查，調查coolant[?ku:l?nt]n.冷凍劑，冷卻液dismounting[d?s'ma?nt??]n.拆卸，拆除NewwordsUnit8RepairandMaintenancePassage2HotTipstipulate['st?pj?le?t]v.規(guī)定changeover[?t?e?nd???v?]n.轉換lubricant[?lu:br?k?nt]n.潤滑油，潤滑劑

adj.潤滑的crankcase['kr??kke?s]n.曲軸箱Extreme[?k'stri:m]n.極端；困境；[數(shù)]極限值parameter[p??r?m?t?]n.[數(shù)]參數(shù)；參量cruising['kru:z??]n.長距離行駛；巡航trailer['tre?l?]n.拖車dealership[?di:l???p]n.經銷商，代理商NewwordsUnit8RepairandMaintenancePassage2HotTipmountingpart固定件，裝配件carriedout實施，執(zhí)行consistsof由…..組成teststands.試驗臺beassociatedwith與…..有聯(lián)系，與……有關oilbath油槽

PhrasesandExpressionsUnit8RepairandMaintenancePassage2HotTip1.Maintenanceisnothingmorethancleaningandwashing,troubleshooting,mounting-parttightening,lubricating,filling,adjustingandotheroperationswhicharecarriedout,asarule,withoutdisassemblingpartsandtakingthemdown.汽車保養(yǎng)只不過是通常的車輛清洗，故障檢修，零部件加固，潤滑，注油，調整以及其他工序，這些操作都是在不拆分零部件的條件下進行的。NotesUnit8RepairandMaintenancePassage2HotTip2.Level1maintenancecallsfortherepeatingofalldailymaintenanceoperationsfollowedbyanumberofadditionaloperationsinvolvingthetighteningofmountingparts,lubricating,inspectingandadjustingofunitsandpartswhichareallcarriedoutwithoutdismountinganddisassemblingthem.一級保養(yǎng)在重復所有的日常保養(yǎng)的工作后還要進行其他一系列工作，包括零部件加固，潤滑，檢查以及調整汽車裝置和部件，這些操作都是在不拆分零部件的條件下進行的。NotesUnit8RepairandMaintenancePassage2HotTip3.Seasonalmaintenanceoftencoincides:washingthecoolingsystem,changingthelubricantintheenginecrankcaseandintheoilbathsofotherunits(freshoilofagradeappropriateforthecomingseasonshouldbeused),checkingthefuelsystemandwashingthefueltank.季節(jié)性保養(yǎng)通常包括以下工作：清洗冷卻系統(tǒng)，更換發(fā)動機曲軸箱潤滑油和其他裝置油槽的機油（應該使用適合于下個季節(jié)的機油），檢查燃油系統(tǒng)，清洗燃油箱。NotesUnit8RepairandMaintenancePassage2HotTip4.Carmakersrecommendtheso-calledextremeortheidealserviceschedulebasedonimpactparameterssuchas:汽車制造商建議所謂的最長周期或最佳保養(yǎng)時間應取決于汽車的碰撞系數(shù)，如：NotesUnit8RepairandMaintenancePassage2HotTip5.Experiencedserviceadvisorsindealershipsandindependentshopsrecommendscheduleintervals,whichareofteninbetweentheidealorextremeserviceschedule.代理商和獨立經銷商中有經驗的服務顧問推薦的時間間隔往往介于理想間隔和保養(yǎng)極限之間。NotesUnit8RepairandMaintenancePassage2

TasksUnit8RepairandMaintenancePassage2Ⅰ.Decidewhetherthefollowingstatementsaretrue(T)orfalse(F)accordingtothepassage.1. Automobilemaintenanceincludedailymaintenance,level1maintenance,level2maintenanceandseasonalmaintenance.()2. Dailymaintenanceconsistsofcleaningandwashingoperations.()3. Seasonalmaintenanceoftencoincides:washingthecoolingsystem,changingthelubricantintheenginecrankcaseandintheoilbathsofotherunitscheckingthefuelsystemandwashingthefueltank.()4. Theactualscheduleofcarmaintenancevariousdependingontheyear,makeandmodelofacar,itsdrivingconditionsanddrivebehavior.()5. Justtheextremehotorcoldclimateconditioncanimpacttherecurrenceofmaintenance()TFTTF

TasksII.TranslatethefollowingexpressionsintoChineseorEnglish.

汽車保養(yǎng)dailymaintenance一級保養(yǎng)

季節(jié)性保養(yǎng)

mountingpartcrankcase

試驗臺

油槽Unit8RepairandMaintenancePassage2automobilemaintenanceseasonalmaintenance曲軸箱固定件日常保養(yǎng)level1maintenanceteststandsoilbathHotTipWritingTask:Workwithyourpartnerandfillinthechecksheet,asthe4sshopworker.Unit8RepairandMaintenanceSpeaking

A:Goodmorning,Mr.Liu.I’mLiLing,theafter-salesreceptionist. B:Goodmorning.A:Pleaseshowmeyourcarmaintenancemanualanddrivinglicense.B:Hereitis.A:NowIneedtochecktheinsideandoutsideconditionofyourcar.B:Ok.Thisway,please.A:Pleaseaffirmtheconditionofyourcarontheinspectionsheet. B:Noproblem.Howlongwillittake?A:Itwilltakeabout90minutes.Youcanhavearestinourcustomerlounge.B:Whataboutthecosts?A:About500RMB.Ifthereisanyaddeditemthatneeded,I’lltellyou.B:Thankyou.Unit8RepairandMaintenanceSpeaking

(Amomentlater)A:Mr.Liu,thebrakepadsoftherearwheelhasbeenwornbadly.Doyouneedtoreplaceit?B:Yes,what’stheprice?A:Thepriceis200RMB,140RMBforthenewbrakepads,and60RMBforthecostofunitproductiontime.B:Noproblem.(Aftertwohours)A:Mr.Liu,themaintenanceforyourcarhasbeenfinished.Pleasecometocheckyourcarwithme.B:Ok,Letmecheckthebrakesystem.Oh,itworksverywellnow.A:Ofcourse.Mr.Liu,hereisthemaintainingsheet.Ifyouhaven’tanydifferentopinions,pleasesignyournameandtakeittothecashiercountertopayforrepairs.B:Allright.Thankyou!A:It’smypleasure.Unit8RepairandMaintenanceSpeaking

Note:Pleaseshowme…請展示一下……Itwilltake…它將要花費……maintainingsheet保養(yǎng)單Task:Followtheabovesamplestomakeupthedialoguesinpairsorgroups.Unit8RepairandMaintenanceTranslation

Maintenanceissomethingmostofusignore,untilourvehiclestopsfunctioning,andthenwewonderwhatwentwrong.Maintenanceisoneofthemostseriousaspectsofownership.Itdeterminesthelongevity,performanceandreliabilityofwhichevervehicleyoudrive.Lookafteryourvehicleinvolvesmorethantakingcareofitsexternalcoatofpaintandkeepingitcleanandshiny.直到汽車出故障以前，汽車的保養(yǎng)總是被我們大多數(shù)人忽視，也就是說，到了那個出故障的時候我們才想知道出了什么故障。保養(yǎng)是影響汽車的最重要因素之一。它決定了你所駕駛車輛的壽命，性能及可靠性。在保養(yǎng)汽車方面，遠遠不止保養(yǎng)他的外觀，保證它的外表清潔，發(fā)亮等。Unit8RepairandMaintenanceExtension

RealExamplesofAutomobileMaintenanceExampleone1.SymptomTherewasaToyotasalooncar,itsenginetypewas2J-GE.Itsacceleratingcapabilityathighvehiclespeedwaspoor.Unit8RepairandMaintenanceExtension

2.DiagnosisAccordingtowhatthedriversaid,firstlyhadadiverrestwhichconfirmedthediver’sdescriptionthatduringacceleration,theoutputpoweroftheengineisinsufficientlikelycausedbypoorfuelsupply.Sowehadafuelpressuretestforthestillvehicle.Thepressureatidlespeedwas2.5kg/cmand3.5kg/cmatacceleration.Thatwasnormal.Thenwecheckedthesparkingtiming.Theresultwassatisfactory.Usingthehand-heldtesterspecificallyforToyotatoreadtroublecodes,wefoundnotroublecodes.Atlastwecheckedthedynamicdatastream.Theresultwaswithintheacceptedrange.Atthistime,allofuswereconfused,butafterconsultingwithotherstaff,wewerestillsuspiciousofthefuelsupply.Sowelinkedafuel-pressuregaugetothefuelrailagainanddrovethecartohavearoadtest.Duringacceleration,wefoundthatthegaugearmdroppedalittle.Aftercomingback,wedisassembledthefueltankandfoundthatthescreenwasseriouslyclogged.Atlast,wetalkedwiththedriverknowingthathiscarhasrunformorethan200,000kmwithoutanyservicesforthefueltank.3.TroublesolvingCleanedthescreenandchangedthefuelfilter.Thevehicle’saccelerationbecamesatisfied.Unit8RepairandMaintenanceExtension

Exampletwo1.SymptomTherewasaHondasalooncarmanufacturedin1999.Itwasveryhardtostartup,andaftertheenginewasrunning,itwobbledviolently.Unit8RepairandMaintenanceExtension

2.DiagnosisAfterthecarwashauledtoourgarage,thestartercouldturntheengine,buttheenginecouldnotrunitself.ThetroublelightofECUcouldnotindicatetroublecodes.WeopenedthedistributorcapandturnedthekeytoONposition.Byusingthemultimetertocheckthe“+”terminalontheignitioncoil,thevoltagewas12.4V.meanwhile,wegroundedthe“-”terminal,andwhendisconnectingthegrounding,wefoundhigh-tensionsparks,whichmeanstheignitioncoilwasnormal.ByusingtheLED(light-emitteddiode),wefoundtheIGTsignalwasnormal.AtthispointweconcludedthattheICMwasabnormal.Soweboughtasecond-handICMtoreplacetheoldone.Afterinstallation,theenginecouldrunitselfbutvibratedhardatidlespeed.Weusedthehand-heldtestertochecktroublecodesandfoundfourtroublecodes,3,6,7and10.3meantabnormalMAPS,6abnormalECTS,7abnormalTPS,and10IATS.Accordingtoourexperiences,whenthereweremanytroublecodesatthesametime,weshouldfirstlychecktheterminalgroundingofECUandsensors.3.TroublesolvingFollowingthecircuitdiagram,wefoundterminal21and22wasseriouslyoxidized.Aftercleaningthemcompletely,reinstallingandeliminatingthetroublecodes,theidlespeedisnormal.Unit8RepairandMaintenanceExtension

Examplethree1.SymptomTherewasanAudi2.6Lsalooncarmanufacturedin2001.Thedrivertoldusthatduringdriving,whenheappliedmildbrake,thebrakepedalpulsated.2.DiagnosisFirstlywehadarodetestwhichconfirmedwhatthedriversaid.Soweusedthehand-heldtestertocheckthetroublecode,butnocodeswereindicated.Thenweconductedconventionalcheckssuchasthebrakefluid,fluidquality,andbrakedisks,whichwereallnormal.Afterchangingallbrakepads,thetroublewaswhatithadbeen.Butwefoundthatthebrakepedaldidn’tpulsatenomatterwhetheritwaspressedhardormildwhenthevehiclespeedwasbelow20km/h..Onlyafterthevehiclespeedwasover20km/hdidthetroubleoccur.Atthispoint,wedisconnectedtheterminalsofbrakesolenoids,andha