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SAE J1979-3_202212

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Hinweis: Neuste Ausgabe: SAE J1979-3_202310

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SAE J1979-3 describes the communication between the zero emissions propulsion systems and test equipment required by government regulations. Standardization regulations require passenger cars and light-, medium-, and heavy-duty trucks to support a minimum set of diagnostic information to external (off-board) “generic” test equipment. To achieve this, SAE J1979-3 is based on the Open Systems Interconnection (OSI) Basic Refer to 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: Application (layer 7), specified in: ○ ISO 14229-1, ISO 14229-3 UDSonCAN, or ISO 14229-5 UDSonIP ○ SAE J1979-3 ZEVonUDS Presentation layer (layer 6), specified in: ○ SAE J1930, SAE J1930DA ○ SAE J1979DA ○ SAE J2012, SAE J2012DA ○ SAE J1939DA, SAE J1939-73 Session layer services (layer 5), specified in: ○ ISO 14229-2 Transport layer services (layer 4), specified in: ○ DoCAN: ISO 15765-2 Transport protocol and network layer services ○ ISO 15765-4 Requirements for emissions related systems ○ DoIP: ISO 13400-2 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 2: Transport protocol and network layer services Network layer services (layer 3), specified in: ○ DoCAN: ISO 15765-2 Transport protocol and network layer services ○ ISO 15765-4 Requirements for emissions related systems ○ DoIP: ISO 13400-2 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 2: Transport protocol and network layer services Data link layer (layer 2), specified in: ○ DoCAN: ISO 15765-4, ISO 11898-1, -2 ○ DoIP: ISO 13400-3 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 3: Wired vehicle interface based on IEEE 802.3 Physical layer (layer 1), specified in: ○ DoCAN: ISO 15765-4, ISO 11898-1, -2, in accordance with Table 1 ○ DoIP: ISO 13400-3 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 3: Wired vehicle interface based on IEEE 802.3 ○ ISO 13400-4 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 4: Ethernet-based high-speed data link connector ○ SAE J1962 Diagnostic Connector NOTE: SAE J1979-3 provides a standard to satisfy known country-specific certification regulations. SAE J1979-3 is not considered a final authority for interpretation of the certification regulations, so users of this document should determine the applicability of capabilities defined in this document for their specific OBD regulatory requirements

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