sae j1979 2002

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2002SocietyofAutomotiveEngineers,Inc.Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]:(R)E/EDiagnosticTestModes—EquivalenttoISO/DIS15031-5:April30,2002ThisdocumentsupersedesSAEJ1979SEP1997,andistechnicallyequivalenttoISO/DIS15031-5:April30,2002,exceptforminorreorganisationofParagraphs1and2.Foreword—On-BoardDiagnostic(OBD)regulationsrequirepassengercars,andlightandmediumdutytrucks,tosupportcommunicationofaminimumsetofdiagnosticinformationtooff-board“generic”testequipment.Thisdocumentspecifiesdiagnosticservicesandfunctionallyaddressedrequest/responsemessagesrequiredtobesupportedbymotorvehiclesandexternaltestequipmentfordiagnosticpurposeswhichpertaintomotorvehicleemission-relateddata.ThesemessagesareintendedtobeusedbyanyexternaltestequipmentmeetingtherequirementsofSAEJ1978forretrievalofOBDinformationfromavehicle.SAEJ1979wasoriginallydevelopedtomeetU.S.OBDrequirementsfor1996andlatermodelyearvehicles.ISO15031-5wasbasedonSAEJ1979andwasintendedtocombinetheU.S.requirementswithEuropeanOBDrequirementsfor2000andlatermodelyearvehicles.Inaddition,thisdocumentandlaterversionsoftheISO/DISdocumentincludenewdatareportingrequirementsincludedinproposedU.S.regulations,andalsoincludespecificrequirementsforretrievalofthesamediagnosticinformationfromvehiclesequippedwithISO15765-4asadiagnosticdatalink.SAEJ1979RevisedAPR2002-2-TABLEOFCONTENTS1Scope........................................................................................................................................................41.1Purpose....................................................................................................................................................41.2DifferencesfromISODocument...............................................................................................................52Reference(s).............................................................................................................................................62.1ApplicablePublications.............................................................................................................................62.1.1SAEPublications......................................................................................................................................62.1.2ISOPublications.......................................................................................................................................62.2RelatedPublications.................................................................................................................................62.2.1SAEPublications......................................................................................................................................62.2.2ISODocuments........................................................................................................................................63Term(s)andDefinition(s)..........................................................................................................................64TechnicalRequirements...........................................................................................................................84.1DiagnosticService,GeneralRequirements..............................................................................................84.1.1MultipleResponsestoaSingleDataRequest.........................................................................................84.1.2ApplicationTimingParameterDefinition...................................................................................................84.1.3MinimumTimebetweenRequestsfromExternalTestEquipment.........................................................104.1.4DataNotAvailable..................................................................................................................................154.1.5MaximumValue......................................................................................................................................194.2DiagnosticMessageFormat...................................................................................................................194.2.1Ad