{"id":3731,"date":"2025-10-17T10:53:31","date_gmt":"2025-10-17T08:53:31","guid":{"rendered":"https:\/\/diagzone.org\/?p=3731"},"modified":"2025-10-17T10:53:33","modified_gmt":"2025-10-17T08:53:33","slug":"j1708-j1587-communication-protocols-for-older-heavy-duty-vehicles-and-construction-machinery","status":"publish","type":"post","link":"https:\/\/diagzone.org\/pt\/j1708-j1587-communication-protocols-for-older-heavy-duty-vehicles-and-construction-machinery\/","title":{"rendered":"J1708 \/ J1587: Protocolos de comunica\u00e7\u00e3o para ve\u00edculos comerciais pesados mais antigos e m\u00e1quinas de constru\u00e7\u00e3o"},"content":{"rendered":"<p>SAE J1708 e SAE J1587 s\u00e3o protocolos de comunica\u00e7\u00e3o legados desenvolvidos para ve\u00edculos comerciais pesados e m\u00e1quinas de constru\u00e7\u00e3o produzidos antes da introdu\u00e7\u00e3o dos modernos sistemas baseados em CAN (J1939). Embora atualmente estejam parcialmente desatualizados, continuam a ser amplamente utilizados em muitas aplica\u00e7\u00f5es de diagn\u00f3stico e assist\u00eancia devido ao grande n\u00famero de ve\u00edculos mais antigos ainda em opera\u00e7\u00e3o.<\/p>\n\n\n\n<p><strong>Como funcionam o J1708 e o J1587<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\" translation-block\"><strong>J1708<\/strong> define a <em>camada f\u00edsica de comunica\u00e7\u00e3o<\/em> \u2014 ou seja, a forma como os dados s\u00e3o transmitidos entre as ECU (Electronic Control Units) do ve\u00edculo. Utiliza o padr\u00e3o RS-485 com uma taxa de transmiss\u00e3o de <strong>9.600 bits por segundo<\/strong>.<\/li>\n\n\n\n<li class=\" translation-block\"><strong>J1587<\/strong> define as <em>camadas de enlace de dados e de aplica\u00e7\u00e3o<\/em> \u2014 ou seja, como as mensagens s\u00e3o codificadas e interpretadas, incluindo os <em>C\u00f3digos de Falha de Diagn\u00f3stico (DTC)<\/em>.<\/li>\n<\/ul>\n\n\n\n<p>Em conjunto, formam um sistema inicial de comunica\u00e7\u00e3o entre o motor, a transmiss\u00e3o, o ABS e outros m\u00f3dulos essenciais em ve\u00edculos comerciais pesados.<\/p>\n\n\n\n<p class=\" translation-block\"><strong>Adaptadores OBD-II da Launch que suportam o protocolo:<\/strong><br>DBScar IV, DBScar V, DBScar VII<\/p>\n\n\n\n<p class=\" translation-block\"><strong>Dispositivos ThinkDiag que suportam o protocolo:<\/strong><br>ThinkDiag 2<\/p>\n\n\n\n<p class=\" translation-block\"><strong>Dispositivos Ediag que suportam o protocolo:<\/strong><br>Ediag Plus, Ediag Elite<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"430\" height=\"430\" src=\"https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-32.jpeg\" alt=\"\" class=\"wp-image-3735\" srcset=\"https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-32.jpeg 430w, https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-32-300x300.jpeg 300w, https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-32-150x150.jpeg 150w, https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-32-100x100.jpeg 100w\" sizes=\"auto, (max-width: 430px) 100vw, 430px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"421\" height=\"421\" src=\"https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-33.jpeg\" alt=\"\" class=\"wp-image-3736\" srcset=\"https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-33.jpeg 421w, https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-33-300x300.jpeg 300w, https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-33-150x150.jpeg 150w, https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/image-33-100x100.jpeg 100w\" sizes=\"auto, (max-width: 421px) 100vw, 421px\" \/><\/figure>\n\n\n\n<p class=\" translation-block\"><strong>Tipos de ve\u00edculos e marcas suportados pelo protocolo:<br><\/strong>Cami\u00f5es pesados antigos, autocarros e m\u00e1quinas de constru\u00e7\u00e3o produzidos antes da ado\u00e7\u00e3o generalizada do protocolo J1939, incluindo Volvo Trucks, Mack, Freightliner, Kenworth, Peterbilt, Cummins, Caterpillar e John Deere.<br>Este protocolo utiliza comunica\u00e7\u00e3o serial (RS-485) e permite a troca de dados de diagn\u00f3stico entre m\u00f3dulos ECU em sistemas HD mais antigos.<\/p>\n\n\n\n<p><strong>Vantagens dos protocolos J1708 \/ J1587<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Estrutura de dados simples e formato de mensagens f\u00e1cil de compreender<\/li>\n\n\n\n<li>Comunica\u00e7\u00e3o fi\u00e1vel em condi\u00e7\u00f5es de trabalho adversas<\/li>\n\n\n\n<li>Compat\u00edvel com cami\u00f5es antigos e maquinaria pesada<\/li>\n\n\n\n<li>Suporte a longo prazo \u2014 ainda utilizado em ferramentas de servi\u00e7o e diagn\u00f3stico<\/li>\n<\/ul>\n\n\n\n<p><strong>Desvantagens e limita\u00e7\u00f5es<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Baixa taxa de transfer\u00eancia de dados (9600 bps) limita o volume de dados<\/li>\n\n\n\n<li>Sem suporte para fun\u00e7\u00f5es avan\u00e7adas dispon\u00edveis no J1939 ou CAN FD<\/li>\n\n\n\n<li>Compatibilidade limitada com sistemas de diagn\u00f3stico modernos<\/li>\n\n\n\n<li>Est\u00e1 a ser gradualmente substitu\u00eddo por protocolos CAN e Ethernet modernos<\/li>\n<\/ul>\n\n\n\n<p><strong>Utiliza\u00e7\u00e3o dos protocolos J1708 \/ J1587<\/strong><\/p>\n\n\n\n<p>Estes protocolos s\u00e3o utilizados em cami\u00f5es, autocarros e m\u00e1quinas de constru\u00e7\u00e3o e agr\u00edcolas fabricados desde o final da d\u00e9cada de 1980 at\u00e9 ao in\u00edcio dos anos 2000. S\u00e3o utilizados principalmente para a diagn\u00f3stica b\u00e1sica do motor, da transmiss\u00e3o, do sistema de travagem e dos componentes do painel de instrumentos.<\/p>\n\n\n\n<p><strong>Conclus\u00e3o<\/strong><\/p>\n\n\n\n<p>Embora os protocolos J1708 e J1587 sejam atualmente considerados obsoletos em compara\u00e7\u00e3o com os padr\u00f5es de comunica\u00e7\u00e3o modernos, continuam a desempenhar um papel crucial na manuten\u00e7\u00e3o e no diagn\u00f3stico de ve\u00edculos e m\u00e1quinas mais antigos. A sua simplicidade e fiabilidade comprovada tornam-nos uma parte essencial da hist\u00f3ria dos sistemas eletr\u00f3nicos no transporte e nas aplica\u00e7\u00f5es industriais.<\/p>","protected":false},"excerpt":{"rendered":"<p>SAE J1708 and SAE J1587 are legacy communication protocols designed for heavy commercial vehicles and construction machinery produced before the introduction of modern CAN-based systems (J1939). Although partially outdated today, they are still widely used in many diagnostic and service applications due to the large number of older vehicles still in operation. How J1708 and&#8230;<\/p>","protected":false},"author":1,"featured_media":3733,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"J1708 \/ J1587: Older heavy-duty vehicles and construction machinery","_seopress_titles_desc":"These protocols are used in trucks, buses, construction, and agricultural machinery manufactured from the late 1980s to the early 2000s.","_seopress_robots_index":"","inline_featured_image":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_themeisle_gutenberg_block_has_review":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"iawp_total_views":88,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"taxonomy_info":{"category":[{"value":1,"label":"Uncategorized"}]},"featured_image_src_large":["https:\/\/diagzone.org\/wp-content\/uploads\/2025\/10\/J1708-J1587-older-vehicles-and-construction-machinery.jpg",600,600,false],"author_info":{"display_name":"diagzone","author_link":"https:\/\/diagzone.org\/pt\/author\/xpro5\/"},"comment_info":0,"category_info":[{"term_id":1,"name":"Uncategorized","slug":"uncategorized","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":33,"filter":"raw","cat_ID":1,"category_count":33,"category_description":"","cat_name":"Uncategorized","category_nicename":"uncategorized","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/posts\/3731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/comments?post=3731"}],"version-history":[{"count":1,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/posts\/3731\/revisions"}],"predecessor-version":[{"id":3737,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/posts\/3731\/revisions\/3737"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/media\/3733"}],"wp:attachment":[{"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/media?parent=3731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/categories?post=3731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diagzone.org\/pt\/wp-json\/wp\/v2\/tags?post=3731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}