\u6df1\u5ea6\u89e3\u6790\u6c7d\u8eca\u8a3a\u65b7\u901a\u8a0a\u4e2d\u7684OSI\u6a21\u578b\u61c9\u7528\u8207J1979\u6a19\u6e96\uff1a\u89e3\u5bc6\u6c7d\u8eca\u96fb\u5b50\u67b6\u69cb\u7684\u672a\u4f86\u8da8\u52e2<\/title>\r\n <link rel=\"stylesheet\" href=\"styles.css\">\r\n <meta name=\"description\" content=\"\u6c7d\u8eca\u8a3a\u65b7\u901a\u8a0a\u5728\u73fe\u4ee3\u6c7d\u8eca\u6280\u8853\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u672c\u6587\u6df1\u5165\u63a2\u8a0e\u4e86OSI\u6a21\u578b\u5728\u6c7d\u8eca\u8a3a\u65b7\u4e2d\u7684\u61c9\u7528\u53ca\u5176\u8207J1979\u6a19\u6e96\u7684\u95dc\u806f\u3002\u96a8\u8457\u96f6\u6392\u653e\u8eca\u8f1b\uff08ZEV\uff09\u7684\u5d1b\u8d77\uff0c\u8eca\u8f09\u8a3a\u65b7\u7cfb\u7d71\u6b63\u7d93\u6b77\u8457\u6df1\u523b\u7684\u8b8a\u9769\u3002\u672c\u6587\u5206\u6790\u4e86\u9019\u4e9b\u8b8a\u9769\u5c0d\u8eca\u8f1b\u96fb\u5b50\u67b6\u69cb\u548c\u74b0\u4fdd\u6a19\u6e96\u7684\u5f71\u97ff\uff0c\u4e26\u63a2\u8a0e\u4e86\u672a\u4f86\u53ef\u80fd\u7684\u767c\u5c55\u8da8\u52e2\u3002\">\r\n<\/head>\r\n<body>\r\n <div class=\"product-content\">\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Automotive Diagnostic Communications Overview<\/h2>\r\n <p>Automotive diagnostic communications is a complex and critical area that relies on the layered architecture of the Open Systems Interconnection (OSI) model and a set of carefully designed standards and protocols. By understanding the application of these standards and protocols across the layers of the OSI model, we can better ensure the efficient operation and continued innovation of the automotive electronics architecture. This article will help you understand the use of the OSI model layers and the associated automotive SAE standards for diagnostic testing.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u5716\u72471\u767c\u52d5\u6a5f\u548c\u8eca\u8f1b\u96f6\u4ef6\u7279\u5beb.jpg\" alt=\"\u767c\u52d5\u6a5f\u548c\u8eca\u8f1b\u96f6\u4ef6\u7279\u5beb\" title=\"Close-up of engine and vehicle parts\">\r\n <p class=\"img-source\">Photo 1: Close-up of engine and vehicle parts<\/p>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Diagnostic Protocols and the OSI Model<\/h2>\r\n <p>Fig. 2 shows a conventional communication system used for diagnostic applications.<strong style=\"color: #0E407E;\">Vehicle Communication Interface (VCI)<\/strong>Connects a diagnostic tester (TST, also known as a scan tool) to the vehicle's diagnostic link connector (DLC). For diagnostic purposes, the TST sends diagnostic service requests to the vehicle and receives diagnostic service responses from the vehicle.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57162\uff1a\u5e36\u8eca\u8f1b\u901a\u8a0a\u4ecb\u9762\u7684\u50b3\u7d71\u901a\u8a0a\u7cfb\u7d71.jpg\" alt=\"\u5e36\u8eca\u8f1b\u901a\u8a0a\u4ecb\u9762\u7684\u50b3\u7d71\u901a\u8a0a\u7cfb\u7d71\" title=\"Conventional Communication System with Vehicle Communication Interface\">\r\n <p class=\"img-source\">Figure 2: Conventional Communication System with Vehicle Communication Interface<\/p>\r\n\r\n <p>The Diagnostic Communication Protocol provides for requests and responses. The International Standardized Diagnostic Communication Protocol is based on the International Standardized Diagnostic Communication Protocol.<strong style=\"color: #0E407E;\">Open System Interconnection (OSI) Basic Reference Model<\/strong>The model divides the communication system into seven layers (Fig. 3).<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57163\uff1a\u958b\u653e\u7cfb\u7d71\u4e92\u76f8\u9023\u7dda\u6a21\u578bOSI\u76847\u500b\u5c64\u7d1a.jpg\" alt=\"\u958b\u653e\u7cfb\u7d71\u4e92\u76f8\u9023\u7dda\u6a21\u578b(OSI)\u76847\u500b\u5c64\u7d1a\" title=\"The 7 layers of the Open Systems Interconnection (OSI) model\">\r\n <p class=\"img-source\">Figure 3: The 7 layers of the Open System Interconnection (OSI) model<\/p>\r\n\r\n <p>Diagnostic communication requests and responses are modeled in the open system interconnection<strong style=\"color: #0E407E;\">Application Layer (L7)<\/strong>specified on the L7. Examples of L7 protocols include UDS on CAN and OBD on UDS, where UDS is an acronym for Unified Diagnostic Service and OBD is an acronym for On-Board Diagnostic System.<strong style=\"color: #0E407E;\">Unified diagnostic services are defined in ISO 14229-3.<\/strong>In SAE J1979-2, an in-vehicle diagnostic system based on the Unified Diagnostic Service is specified (Fig. 4).<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57164\uff1a\u6839\u64daOSI\u6a21\u578b\u6620\u5c04\u7684\u8a3a\u65b7\u901a\u8a0a.jpg\" alt=\"\u6839\u64daOSI\u6a21\u578b\u6620\u5c04\u7684\u8a3a\u65b7\u901a\u8a0a\" title=\"Diagnostic communications mapped according to the OSI model\">\r\n <p class=\"img-source\">Fig. 4: Diagnostic communication mapped according to OSI model<\/p>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">OBD System Transformation in the ZEV Era<\/h2>\r\n <p>As the automotive industry raises its environmental requirements, especially for the rise of Zero Emission Vehicles (ZEVs), On-Board Diagnostic (OBD) systems and their related standards are evolving.<\/p>\r\n <p><strong style=\"color: #0E407E;\">The original On-Board Diagnostic (OBD) system, based on the SAE J1979 standard, is primarily used to monitor and reduce the emission of hazardous pollutants from conventional internal combustion vehicles.<\/strong>These include carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (HC) and particulate matter (PM). The application layer protocol SAE J1979 and its \u201cOnboard Diagnostic Mode\u201d on CAN have been protecting our environment from harmful pollutants for decades.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57165\uff1aISO-14229\u898f\u5b9a\u4e8626\u7a2e\u901a\u7528\u8a3a\u65b7\u670d\u52d9.jpg\" alt=\"ISO 14229\u898f\u5b9a\u4e8626\u7a2e\u901a\u7528\u8a3a\u65b7\u670d\u52d9\" title=\"ISO 14229 specifies 26 generic diagnostic services.\">\r\n <p class=\"img-source\">Figure 5: ISO 14229 specifies 26 generic diagnostic services.<\/p>\r\n\r\n <p>With the adoption of Unified Diagnostic Services (UDS) by regulators, the SAE J1979 standard has been refined into a number of components, of which<strong style=\"color: #0E407E;\">SAE J1979-2 is specifically designed for internal combustion vehicles.<\/strong>but (not)<strong style=\"color: #0E407E;\">SAE J1979-3 for zero-emission vehicle propulsion system<\/strong>For zero-emission vehicles, emission-related fault monitoring is replaced with propulsion system-related fault monitoring. For zero-emission vehicles, emission-related fault monitoring is replaced with propulsion system-related fault monitoring.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57166-SAE-J1979-3.jpg\" alt=\"SAE J1979-3\" title=\"SAE J1979-3\">\r\n <p class=\"img-source\">Figure 6: SAE J1979-3<\/p>\r\n\r\n <p>More than just a specific OBD specification, SAE J1979-3 is associated with regulations that require the standardization of diagnostic data and powertrain algorithmic data to support ZEV maintainability, warranty compliance, facilitate the ZEV used vehicle market, and provide the data needed to confirm that a vehicle meets battery durability requirements. It is also expected that future releases of SAE J1979-3 may include additional ISO 14229 services, subfunctions, DIDs, and ZEV-related DTCs.<\/p>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Update on SAE J1979-3 and SAE J1979-2<\/h2>\r\n <p>SAE J1979-2 and -3 are both variants of ISO 14229 (Unified Diagnostic Service), but are limited to emissions-related failures and zero-emission vehicle advancement-related failures, respectively, and associated diagnostic information.<\/p>\r\n <p><strong style=\"color: #0E407E;\">California Air Resources Board (CARB)<\/strong>Requires a new diagnostic communication protocol:<\/p>\r\n <ul>\r\n <li><strong style=\"color: #0E407E;\">SAE J1979-2<\/strong>: Starting in 2023, all vehicles with internal combustion engines must support SAE J1979-2 by 2027.<\/li>\r\n <li><strong style=\"color: #0E407E;\">SAE J1979-3<\/strong>: By 2027, all Zero Emission Vehicles (ZEVs) and Plug-in Hybrid Electric Vehicles (PHEVs) must support SAE J1979-3.<\/li>\r\n <\/ul>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57167\u50b3\u7d71\u5354\u8b70\u8207\u73fe\u4ee3\u64f4\u5c55.jpg\" alt=\"\u50b3\u7d71\u5354\u8b70\u8207\u73fe\u4ee3\u64f4\u5c55\" title=\"Traditional Protocols and Modern Extensions\">\r\n <p class=\"img-source\">Figure 7: Traditional Agreements and Modern Extensions<\/p>\r\n\r\n <p>Neither J1979-2 nor J1979-3 support vehicle manufacturer-specific diagnostic applications such as calibration or brushing programs. For performance reasons, the<strong style=\"color: #0E407E;\">ISO 14229-5 Standardized Unified Diagnostic Service for Internet Protocol (UDSonIP)<\/strong>It has become the latest technology for writing programs.<\/p>\r\n <\/div>\r\n\r\n <footer class=\"product-footer\">\r\n <div class=\"additional-info\">\r\n <p class=\"interest-message\"><strong style=\"color: #000;\">If you are interested, you are welcome to follow us for more information about the article and contact us if you have any questions!<\/strong><\/p>\r\n <div class=\"related-articles\">\r\n <h3>Extended Reading:<\/h3>\r\n <ul>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/can-adapter-for-ethernet-connection\/\">\u27a2Honghong Technology \ufe31 support for Ethernet connection CAN adapter! Kvaser Ethercan HS to help the solar boat ride the waves!<\/a><\/li>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/can-bus-technology-application-in-shipbuilding-industry\/\">\u27a2Honghong Technology \ufe31 A technical dry goods to share-analysis of CAN bus technology in the marine industry applications<\/a><\/li>\r\n <\/ul>\r\n <\/div>\r\n <\/div>\r\n <\/footer>\r\n <\/div>\r\n<\/body>\r\n<\/html>\r\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5312fc7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5312fc7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6c7995f\" 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https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-768x148.png 768w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-600x115.png 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5ea6\u89e3\u6790\u6c7d\u8eca\u8a3a\u65b7\u901a\u8a0a\u4e2d\u7684OSI\u6a21\u578b\u61c9\u7528\u8207J1979\u6a19\u6e96\uff1a\u89e3\u5bc6\u6c7d\u8eca\u96fb\u5b50\u67b6\u69cb\u7684\u672a\u4f86\u8da8\u52e2 \u6c7d\u8eca\u8a3a\u65b7\u901a\u8a0a\u6982\u8ff0 \u6c7d\u8eca\u8a3a\u65b7 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\n\t\t\t\t\t\r\n\r\n\r\n \r\n \r\n \u6df1\u5ea6\u89e3\u6790\u6c7d\u8eca\u8a3a\u65b7\u901a\u8a0a\u4e2d\u7684OSI\u6a21\u578b\u61c9\u7528\u8207J1979\u6a19\u6e96\uff1a\u89e3\u5bc6\u6c7d\u8eca\u96fb\u5b50\u67b6\u69cb\u7684\u672a\u4f86\u8da8\u52e2<\/title>\r\n <link rel=\"stylesheet\" href=\"styles.css\">\r\n <meta name=\"description\" content=\"\u6c7d\u8eca\u8a3a\u65b7\u901a\u8a0a\u5728\u73fe\u4ee3\u6c7d\u8eca\u6280\u8853\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u672c\u6587\u6df1\u5165\u63a2\u8a0e\u4e86OSI\u6a21\u578b\u5728\u6c7d\u8eca\u8a3a\u65b7\u4e2d\u7684\u61c9\u7528\u53ca\u5176\u8207J1979\u6a19\u6e96\u7684\u95dc\u806f\u3002\u96a8\u8457\u96f6\u6392\u653e\u8eca\u8f1b\uff08ZEV\uff09\u7684\u5d1b\u8d77\uff0c\u8eca\u8f09\u8a3a\u65b7\u7cfb\u7d71\u6b63\u7d93\u6b77\u8457\u6df1\u523b\u7684\u8b8a\u9769\u3002\u672c\u6587\u5206\u6790\u4e86\u9019\u4e9b\u8b8a\u9769\u5c0d\u8eca\u8f1b\u96fb\u5b50\u67b6\u69cb\u548c\u74b0\u4fdd\u6a19\u6e96\u7684\u5f71\u97ff\uff0c\u4e26\u63a2\u8a0e\u4e86\u672a\u4f86\u53ef\u80fd\u7684\u767c\u5c55\u8da8\u52e2\u3002\">\r\n<\/head>\r\n<body>\r\n <div class=\"product-content\">\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Automotive Diagnostic Communications Overview<\/h2>\r\n <p>Automotive diagnostic communications is a complex and critical area that relies on the layered architecture of the Open Systems Interconnection (OSI) model and a set of carefully designed standards and protocols. By understanding the application of these standards and protocols across the layers of the OSI model, we can better ensure the efficient operation and continued innovation of the automotive electronics architecture. This article will help you understand the use of the OSI model layers and the associated automotive SAE standards for diagnostic testing.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u5716\u72471\u767c\u52d5\u6a5f\u548c\u8eca\u8f1b\u96f6\u4ef6\u7279\u5beb.jpg\" alt=\"\u767c\u52d5\u6a5f\u548c\u8eca\u8f1b\u96f6\u4ef6\u7279\u5beb\" title=\"Close-up of engine and vehicle parts\">\r\n <p class=\"img-source\">Photo 1: Close-up of engine and vehicle parts<\/p>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Diagnostic Protocols and the OSI Model<\/h2>\r\n <p>Fig. 2 shows a conventional communication system used for diagnostic applications.<strong style=\"color: #0E407E;\">Vehicle Communication Interface (VCI)<\/strong>Connects a diagnostic tester (TST, also known as a scan tool) to the vehicle's diagnostic link connector (DLC). For diagnostic purposes, the TST sends diagnostic service requests to the vehicle and receives diagnostic service responses from the vehicle.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57162\uff1a\u5e36\u8eca\u8f1b\u901a\u8a0a\u4ecb\u9762\u7684\u50b3\u7d71\u901a\u8a0a\u7cfb\u7d71.jpg\" alt=\"\u5e36\u8eca\u8f1b\u901a\u8a0a\u4ecb\u9762\u7684\u50b3\u7d71\u901a\u8a0a\u7cfb\u7d71\" title=\"Conventional Communication System with Vehicle Communication Interface\">\r\n <p class=\"img-source\">Figure 2: Conventional Communication System with Vehicle Communication Interface<\/p>\r\n\r\n <p>The Diagnostic Communication Protocol provides for requests and responses. The International Standardized Diagnostic Communication Protocol is based on the International Standardized Diagnostic Communication Protocol.<strong style=\"color: #0E407E;\">Open System Interconnection (OSI) Basic Reference Model<\/strong>The model divides the communication system into seven layers (Fig. 3).<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57163\uff1a\u958b\u653e\u7cfb\u7d71\u4e92\u76f8\u9023\u7dda\u6a21\u578bOSI\u76847\u500b\u5c64\u7d1a.jpg\" alt=\"\u958b\u653e\u7cfb\u7d71\u4e92\u76f8\u9023\u7dda\u6a21\u578b(OSI)\u76847\u500b\u5c64\u7d1a\" title=\"The 7 layers of the Open Systems Interconnection (OSI) model\">\r\n <p class=\"img-source\">Figure 3: The 7 layers of the Open System Interconnection (OSI) model<\/p>\r\n\r\n <p>Diagnostic communication requests and responses are modeled in the open system interconnection<strong style=\"color: #0E407E;\">Application Layer (L7)<\/strong>specified on the L7. Examples of L7 protocols include UDS on CAN and OBD on UDS, where UDS is an acronym for Unified Diagnostic Service and OBD is an acronym for On-Board Diagnostic System.<strong style=\"color: #0E407E;\">Unified diagnostic services are defined in ISO 14229-3.<\/strong>In SAE J1979-2, an in-vehicle diagnostic system based on the Unified Diagnostic Service is specified (Fig. 4).<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57164\uff1a\u6839\u64daOSI\u6a21\u578b\u6620\u5c04\u7684\u8a3a\u65b7\u901a\u8a0a.jpg\" alt=\"\u6839\u64daOSI\u6a21\u578b\u6620\u5c04\u7684\u8a3a\u65b7\u901a\u8a0a\" title=\"Diagnostic communications mapped according to the OSI model\">\r\n <p class=\"img-source\">Fig. 4: Diagnostic communication mapped according to OSI model<\/p>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">OBD System Transformation in the ZEV Era<\/h2>\r\n <p>As the automotive industry raises its environmental requirements, especially for the rise of Zero Emission Vehicles (ZEVs), On-Board Diagnostic (OBD) systems and their related standards are evolving.<\/p>\r\n <p><strong style=\"color: #0E407E;\">The original On-Board Diagnostic (OBD) system, based on the SAE J1979 standard, is primarily used to monitor and reduce the emission of hazardous pollutants from conventional internal combustion vehicles.<\/strong>These include carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (HC) and particulate matter (PM). The application layer protocol SAE J1979 and its \u201cOnboard Diagnostic Mode\u201d on CAN have been protecting our environment from harmful pollutants for decades.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57165\uff1aISO-14229\u898f\u5b9a\u4e8626\u7a2e\u901a\u7528\u8a3a\u65b7\u670d\u52d9.jpg\" alt=\"ISO 14229\u898f\u5b9a\u4e8626\u7a2e\u901a\u7528\u8a3a\u65b7\u670d\u52d9\" title=\"ISO 14229 specifies 26 generic diagnostic services.\">\r\n <p class=\"img-source\">Figure 5: ISO 14229 specifies 26 generic diagnostic services.<\/p>\r\n\r\n <p>With the adoption of Unified Diagnostic Services (UDS) by regulators, the SAE J1979 standard has been refined into a number of components, of which<strong style=\"color: #0E407E;\">SAE J1979-2 is specifically designed for internal combustion vehicles.<\/strong>but (not)<strong style=\"color: #0E407E;\">SAE J1979-3 for zero-emission vehicle propulsion system<\/strong>For zero-emission vehicles, emission-related fault monitoring is replaced with propulsion system-related fault monitoring. For zero-emission vehicles, emission-related fault monitoring is replaced with propulsion system-related fault monitoring.<\/p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57166-SAE-J1979-3.jpg\" alt=\"SAE J1979-3\" title=\"SAE J1979-3\">\r\n <p class=\"img-source\">Figure 6: SAE J1979-3<\/p>\r\n\r\n <p>More than just a specific OBD specification, SAE J1979-3 is associated with regulations that require the standardization of diagnostic data and powertrain algorithmic data to support ZEV maintainability, warranty compliance, facilitate the ZEV used vehicle market, and provide the data needed to confirm that a vehicle meets battery durability requirements. It is also expected that future releases of SAE J1979-3 may include additional ISO 14229 services, subfunctions, DIDs, and ZEV-related DTCs.<\/p>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Update on SAE J1979-3 and SAE J1979-2<\/h2>\r\n <p>SAE J1979-2 and -3 are both variants of ISO 14229 (Unified Diagnostic Service), but are limited to emissions-related failures and zero-emission vehicle advancement-related failures, respectively, and associated diagnostic information.<\/p>\r\n <p><strong style=\"color: #0E407E;\">California Air Resources Board (CARB)<\/strong>Requires a new diagnostic communication protocol:<\/p>\r\n <ul>\r\n <li><strong style=\"color: #0E407E;\">SAE J1979-2<\/strong>: Starting in 2023, all vehicles with internal combustion engines must support SAE J1979-2 by 2027.<\/li>\r\n <li><strong style=\"color: #0E407E;\">SAE J1979-3<\/strong>: By 2027, all Zero Emission Vehicles (ZEVs) and Plug-in Hybrid Electric Vehicles (PHEVs) must support SAE J1979-3.<\/li>\r\n <\/ul>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/08\/\u57167\u50b3\u7d71\u5354\u8b70\u8207\u73fe\u4ee3\u64f4\u5c55.jpg\" alt=\"\u50b3\u7d71\u5354\u8b70\u8207\u73fe\u4ee3\u64f4\u5c55\" title=\"Traditional Protocols and Modern Extensions\">\r\n <p class=\"img-source\">Figure 7: Traditional Agreements and Modern Extensions<\/p>\r\n\r\n <p>Neither J1979-2 nor J1979-3 support vehicle manufacturer-specific diagnostic applications such as calibration or brushing programs. For performance reasons, the<strong style=\"color: #0E407E;\">ISO 14229-5 Standardized Unified Diagnostic Service for Internet Protocol (UDSonIP)<\/strong>It has become the latest technology for writing programs.<\/p>\r\n <\/div>\r\n\r\n <footer class=\"product-footer\">\r\n <div class=\"additional-info\">\r\n <p class=\"interest-message\"><strong style=\"color: #000;\">If you are interested, you are welcome to follow us for more information about the article and contact us if you have any questions!<\/strong><\/p>\r\n <div class=\"related-articles\">\r\n <h3>Extended Reading:<\/h3>\r\n <ul>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/can-adapter-for-ethernet-connection\/\">\u27a2Honghong Technology \ufe31 support for Ethernet connection CAN adapter! 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