{"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\/fr\/j1708-j1587-communication-protocols-for-older-heavy-duty-vehicles-and-construction-machinery\/","title":{"rendered":"J1708 \/ J1587 : Protocoles de communication pour les v\u00e9hicules utilitaires lourds plus anciens et les engins de chantier"},"content":{"rendered":"<p>SAE J1708 et SAE J1587 sont des protocoles de communication h\u00e9rit\u00e9s, con\u00e7us pour les v\u00e9hicules commerciaux lourds et les machines de construction fabriqu\u00e9s avant l\u2019introduction des syst\u00e8mes modernes bas\u00e9s sur le CAN (J1939). Bien qu\u2019ils soient aujourd\u2019hui partiellement obsol\u00e8tes, ils restent largement utilis\u00e9s dans de nombreuses applications de diagnostic et de maintenance en raison du grand nombre de v\u00e9hicules plus anciens encore en service.<\/p>\n\n\n\n<p><strong>Comment fonctionnent J1708 et J1587<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\" translation-block\"><strong>J1708<\/strong> d\u00e9finit la <em>couche de communication physique<\/em> \u2014 c\u2019est-\u00e0-dire la mani\u00e8re dont les donn\u00e9es sont transmises entre les calculateurs du v\u00e9hicule (ECU \u2013 Electronic Control Units). Il utilise la norme RS-485 avec un d\u00e9bit de <strong>9 600 bits par seconde<\/strong>.<\/li>\n\n\n\n<li class=\" translation-block\"><strong>J1587<\/strong> d\u00e9finit les <em>couches liaison de donn\u00e9es et application<\/em> \u2014 c\u2019est-\u00e0-dire la mani\u00e8re dont les messages sont cod\u00e9s et interpr\u00e9t\u00e9s, y compris les <em>codes d\u2019anomalie de diagnostic (DTC)<\/em>.<\/li>\n<\/ul>\n\n\n\n<p>Ensemble, ils constituent un syst\u00e8me de communication pr\u00e9coce entre le moteur, la transmission, l\u2019ABS et d\u2019autres modules essentiels des v\u00e9hicules lourds.<\/p>\n\n\n\n<p class=\" translation-block\"><strong>Adaptateurs OBD-II Launch prenant en charge le protocole :<\/strong><br>DBScar IV, DBScar V, DBScar VII<\/p>\n\n\n\n<p class=\" translation-block\"><strong>Appareils ThinkDiag prenant en charge le protocole :<\/strong><br>ThinkDiag 2<\/p>\n\n\n\n<p class=\" translation-block\"><strong>Appareils Ediag prenant en charge le protocole :<\/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>Types de v\u00e9hicules et marques pris en charge par le protocole :<br><\/strong>Anciens camions lourds, bus et machines de construction produits avant l\u2019adoption g\u00e9n\u00e9ralis\u00e9e du protocole J1939, y compris Volvo Trucks, Mack, Freightliner, Kenworth, Peterbilt, Cummins, Caterpillar et John Deere.<br>Ce protocole utilise une communication s\u00e9rie (RS-485) et permet l\u2019\u00e9change de donn\u00e9es de diagnostic entre les modules ECU dans les anciens syst\u00e8mes HD.<\/p>\n\n\n\n<p><strong>Avantages des protocoles J1708 \/ J1587<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Structure de donn\u00e9es simple et format de message facile \u00e0 comprendre<\/li>\n\n\n\n<li>Communication fiable dans des conditions de travail difficiles<\/li>\n\n\n\n<li>Compatible avec les anciens camions et les machines lourdes<\/li>\n\n\n\n<li>Support \u00e0 long terme \u2014 toujours utilis\u00e9 dans les outils de service et de diagnostic<\/li>\n<\/ul>\n\n\n\n<p><strong>Inconv\u00e9nients et limitations<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faible d\u00e9bit de donn\u00e9es (9 600 bps) limitant le volume de donn\u00e9es<\/li>\n\n\n\n<li>Aucune prise en charge des fonctions avanc\u00e9es disponibles dans J1939 ou CAN FD<\/li>\n\n\n\n<li>Compatibilit\u00e9 limit\u00e9e avec les syst\u00e8mes de diagnostic modernes<\/li>\n\n\n\n<li>Progressivement remplac\u00e9 par des protocoles CAN et Ethernet modernes<\/li>\n<\/ul>\n\n\n\n<p><strong>Utilisation des protocoles J1708 \/ J1587<\/strong><\/p>\n\n\n\n<p>Ces protocoles sont utilis\u00e9s dans les camions, les bus, ainsi que les machines de construction et agricoles fabriqu\u00e9s de la fin des ann\u00e9es 1980 au d\u00e9but des ann\u00e9es 2000. Ils sont principalement utilis\u00e9s pour le diagnostic de base du moteur, de la transmission, du syst\u00e8me de freinage et des composants du tableau de bord.<\/p>\n\n\n\n<p><strong>Conclusion<\/strong><\/p>\n\n\n\n<p>Bien que J1708 et J1587 soient aujourd\u2019hui consid\u00e9r\u00e9s comme obsol\u00e8tes par rapport aux normes de communication modernes, ils jouent encore un r\u00f4le crucial dans la maintenance et le diagnostic des v\u00e9hicules et machines plus anciens. Leur simplicit\u00e9 et leur fiabilit\u00e9 \u00e9prouv\u00e9e en font une partie essentielle de l\u2019histoire des syst\u00e8mes \u00e9lectroniques dans les domaines du transport et de l\u2019industrie.<\/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":89,"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\/fr\/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\/fr\/wp-json\/wp\/v2\/posts\/3731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/comments?post=3731"}],"version-history":[{"count":1,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/posts\/3731\/revisions"}],"predecessor-version":[{"id":3737,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/posts\/3731\/revisions\/3737"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/media\/3733"}],"wp:attachment":[{"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/media?parent=3731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/categories?post=3731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diagzone.org\/fr\/wp-json\/wp\/v2\/tags?post=3731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}