SAE J1979 / ISO 15031-5 set includes the communication between the vehicle's OBD systems and test equipment implemented across vehicles within the scope of the legislated emissions-related OBD.
SAE J1979-2014 Referenced Document
ISO 14230 Road vehicles - Diagnostic systems; Keyword protocol 2000 - Part 4: Requirements for emission-related systems
ISO 15031 Road vehicles.Communication between vehicle and external equipment for emissions-related diagnostics.Part 7: Data link security
ISO 15765-2:2011 Road vehicles - Diagnostic communication over Controller Area Network (DoCAN) - Part 2: Transport protocol and network layer services
ISO 15765-4:2011 Road vehicles - Diagnostic communication over Controller Area Network (DoCAN) - Part 4: Requirements for emissions-related systems
ISO 9141-2:1994 Road vehicles; diagnostic systems; part 2: CARB requirements for interchange of digital information
SAE J1850-2006 Class B Data Communication Network Interface
SAE J1930-2008 Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations and Acronyms Equivalent to ISO/TR 15031-2
SAE J1930DA-2014 J1930 Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, and Acronyms Web Tool Spreadsheet
SAE J1978-2002 OBD II Scan Tool Equivalent to ISO/DIS 15031-4:December 14, 2001
SAE J1979DA-2014 J1979-DA, Digital Annex of E/E Diagnostic Test Modes