ISO INTERNATIONAL STANDARD 27145-1 First edition 2012-08-15 Roadvehicleslmplementationof World-Wide Harmonized On-Board Diagnostics (wwH-OBD)communication requirements - Part 1: General information and use case definition Véhicules routiers-Mise enapplicationdes exigences de communicationpourlediagnosticembarqueharmoniséaI'échelle mondiale(WWH-OBD)-Partie 1:Informationsgenerales et definition de cas d'usage Reference number ISO 27145-1:2012(E) ISO @ISO2012 ISO 27145-1:2012(E) Contents Page Foreword .iv 0 Introduction 0.1 Overview. 0.2 SAEdocumentreferenceconcept 0.3 SAEdigitalannexrevisionprocedure vi 1 Scope. 2 Normativereferences 3 Terms,definitionsandabbreviatedterms 3.1 Terms and definitions. 3.2 Abbreviatedterms 4 Conventions. 5 Document overview. 6 WWH-OBDusecaseoverview 6.1 Overview. 6.2 WWH-OBDusecaseclusters. 7 WWH-OBD use casedefinition.. 7.1 Uc1Informationabouttheemissions-relatedoBDsystemstate 8 7.2 Uc 2Informationabout activeand confirmed emissions-relatedmalfunctions 9 7.3 Uc3—Informationrelatedtodiagnosisforthepurposeofrepair 10 8 Vehicle on-board diagnostic 11 8.1 VOBDdefinition 11 8.2 TheVOBDsystem. 11 8.3 The VOBD data set... 14 8.4 TheVOBDaccessmethod 14 Bibliography 19 @ ISO 2012 -All rights reserved ili ISO 27145-1:2012(E) Foreword IsO (the International Organization for Standardization)is a worldwide federation of national standards bodies technical committees.Eachmemberbody interested in a subjectfor whichatechnical committeehas been non-governmental, in liaison with isO,also take part in the work.isO collaborates closely with the International Electrotechnical Commission (IEC) onall matters of electrotechnical standardization. adopted by the technical committees are circulated to the member bodies for voting.Publication as an International Standardrequires approval byatleast75%ofthe memberbodies castingavote. rights. isO shall not be held responsible for identifying any or all such patent rights. ISO27145-1waspreparedbyTechnicalCommitteeISO/TC22,Roadvehicles,SubcommitteeSC3,Electrical and electronicequipment. This first edition ofiSO21745-1 cancels and replacesISO/PAS27145-1:2006, whichhas beentechnicallyrevised IsO27145consists ofthefollowingparts,underthegeneral title Roadvehicles—Implementation of World-Wide HarmonizedOn-BoardDiagnostics(WWH-OBD)communicationrequirements: Part 1:General information and use casedefinition 一 Part2:Commondatadictionary Part3:Commonmessagedictionary Part4:Connection between vehicle and test equipment The following parts are under preparation: Part6:Externaltestequipment iv ISO 2012 -All rights reserved ISO27145-1:2012(E) 0 Introduction 0.1 Overview The ISO27145 series includes the communication between the vehicle's on-board diagnostics (OBD)systems Technical Regulations (WWH-OBD GTR). WWH-OBD systems. The ISO27145 series includes the communication between the vehicle's WWH-OBD systems and external in ISO/IEC 7498-1andISO/IEC10731,which structures communication systems into seven layers.Where mapped on this model, the services specified by IsO 27145 are divided into diagnostic services (layer 7), specified in ISO 27145-3 with reference to ISO 14229-1, presentationlayer (layer6),specified inISO27145-2with reference to SAEJ1930-DA,SAE J1939Companion Spreadsheet (SPNs), SAE J1939-73:2010,AppendixA(FMls), SAE J1979-DAand SAE J2012-DA session layer services (layer 5), specified in IsO 14229-2, transport layer services (layer 4), specified in ISO 27145-4 with reference to ISO 13400-2, ISO 15765-2 andISO15765-4, network layer services (layer3), specified in ISO 27145-4 with reference to ISO 15765-4, ISO 15765-2 and ISO13400-2, data link layer (layer2), specified in ISO27145-4 with reference to IsO 11898-1, isO 11898-2, ISO 15765-4, ISO13400-3andIEEE802.3.and physical layer(layer 1), specified inISO27145-4 with reference toISO 11898-1,iSO 11898-2,ISO15765-4 isO13400-3and IEEE802.3, in accordance with Table 1. Table1-WWH-OBDspecificationreferenceapplicabletotheOSllayers Applicab