J1979_201702 E/E Diagnostic Test Modes
Revised
02/16/2017
- Features
- Issuing Committee
- Content
- 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.To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model in accordance with ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. When mapped on this model, the services specified are broken into:
-
— Diagnostic services (layer 7), specified in:
-
— ISO 15031-5/SAE J1979 (emissions-related OBD),
-
— ISO 27145-3 (WWH-OBD),
-
-
— Presentation layer (layer 6), specified in:
-
— ISO 15031-2, SAE J1930-DA,
-
— ISO 15031-5, SAE J1979-DA,
-
— ISO 15031-6, SAE J2012-DA,
-
— ISO 27145-2, SAE J2012-DA,
-
-
— Session layer services (layer 5), specified in:
-
— ISO 14229-2 supports ISO 15765-4 DoCAN and ISO 14230-4 DoK-Line protocols,
-
— ISO 14229-2 is not applicable to the SAE J1850 and ISO 9141-2 protocols,
-
-
— Transport layer services (layer 4), specified in:
-
— DoCAN: ISO 15765-2 Transport protocol and network layer services,
-
— SAE J1850: ISO 15031-5/SAE J1979 Emissions-related diagnostic services,
-
— ISO 9141-2: ISO 15031-5/SAE J1979 Emissions-related diagnostic services,
-
— DoK-Line: ISO 14230-4, ISO 15031-5/SAE J1979 Emissions-related diagnostic services,
-
-
— Network layer services (layer 3), specified in:
-
— DoCAN: ISO 15765-2 Transport protocol and network layer services,
-
— SAE J1850: ISO 15031-5/SAE J1979 Emissions-related diagnostic services,
-
— ISO 9141-2: ISO 15031-5/SAE J1979 Emissions-related diagnostic services,
-
— DoK-Line: ISO 14230-4, ISO 15031-5/SAE J1979 Emissions-related diagnostic services,
-
-
— Data link layer (layer 2), specified in:
-
— DoCAN: ISO 15765-4, ISO 11898-1, -2,
-
— SAE J1850,
-
— ISO 9141-2,
-
— DoK-Line: ISO 14230-2,
-
-
— Physical layer (layer 1), specified in:
-
— DoCAN: ISO 15765-4, ISO 11898-1, -2,
-
— SAE J1850,
-
— ISO 9141-2,
-
— DoK-Line: ISO 14230-1,
-
in accordance with Table 1. -
- Pages
- 143
- Citation
- SAE International Technical Standard, E/E Diagnostic Test Modes, SAE Standard J1979_201702, Revised February 2017, Issued December 1991, https://doi.org/10.4271/J1979_201702.