SAE-J1939-73

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.QUESTIONSREGARDINGTHISDOCUMENT:[phone]FAX:[phone]TOPLACEADOCUMENTORDER:[phone]FAX:[phone]SAEWEBADDRESS—DiagnosticsForeword—ThisseriesofSAERecommendedPracticeshasbeendevelopedbytheTruckandBusControlandCommunicationsNetworkSubcommitteeoftheTruckandBusElectricalandElectronicsCommittee.Theobjectivesofthesubcommitteearetodevelopinformationreports,recommendedpractices,andstandardsconcernedwiththerequirements,design,andusageofdeviceswhichtransmitelectronicsignalsandcontrolinformationamongvehiclecomponents.TheseSAERecommendedPracticesareintendedasaguidetowardstandardpracticeandaresubjecttochangesoastokeeppacewithexperienceandtechnicaladvances.TABLEOFCONTENTSForeword........................................................................................................................................11.Scope.............................................................................................................................................32.References.....................................................................................................................................32.1ApplicablePublications....................................................................................................................32.1.1SAEPublications.............................................................................................................................32.1.2CaliforniaAirResourcesBoard(CARB)Publication...........................................................................33.Definitions.......................................................................................................................................33.1ContinuouslyMonitorSystems.........................................................................................................33.2DiagnosticTroubleCode..........................................................................................................................43.3FreezeFrame.................................................................................................................................43.4MalfunctionIndicatorLamp(MIL).....................................................................................................43.5Non-ContinuouslyMonitoredSystems..............................................................................................43.6ReadinessCode(seeDM5).............................................................................................................43.7Broadcast(seeDM13)..............................................................................................................................43.8Port(seeDM13).......................................................................................................................................44.Abbreviations..................................................................................................................................45.TechnicalRequirements..................................................................................................................55.1General..........................................................................................................................................55.2OverviewofDiagnosticRequirements.....................................................................................................55.2.1DiagnosticCapabilitiesEnvisioned...........................................................................................................5SAEJ1939-73RevisedOCT1998-2-5.2.2SuggestedDiagnosticSupport........................................................................................................55.2.2.1EmissionRelatedComponents........................................................................................................55.2.2.2Non-EmissionRelatedComponents.................................................................................................55.2.3GeneralConditionsforDiagnosticProcedures..................................................................................65.3Security.........................................................................................................................................65.3.1DataLinkSecur