{"id":1121,"date":"2021-05-17T09:00:43","date_gmt":"2021-05-17T07:00:43","guid":{"rendered":"https:\/\/www.avatacar.com\/blog\/?p=1121"},"modified":"2026-04-09T15:51:38","modified_gmt":"2026-04-09T13:51:38","slug":"quest-ce-que-le-diagnostic-electronique","status":"publish","type":"post","link":"https:\/\/www.avatacar.com\/blog\/entretien-revision\/quest-ce-que-le-diagnostic-electronique\/","title":{"rendered":"Qu&rsquo;est-ce que le diagnostic \u00e9lectronique ?"},"content":{"rendered":"<div  class='flex_column av-2abue9-5dec3bccd2c85375ae8bddb5060ee87a av_one_full  avia-builder-el-0  el_before_av_one_full  avia-builder-el-first  first flex_column_div  '     ><div  class='avia-slideshow av-lnyde7bf-2a558524e03c85842e61ec73c53bfa78 avia-slideshow-no scaling av_slideshow avia-slide-slider  avia-builder-el-1  avia-builder-el-no-sibling  av-slideshow-ui av-control-default av-slideshow-manual av-loop-once av-loop-manual-endless av-default-height-applied avia-slideshow-1' data-slideshow-options=\"{&quot;animation&quot;:&quot;slide&quot;,&quot;autoplay&quot;:false,&quot;loop_autoplay&quot;:&quot;once&quot;,&quot;interval&quot;:5,&quot;loop_manual&quot;:&quot;manual-endless&quot;,&quot;autoplay_stopper&quot;:false,&quot;noNavigation&quot;:false,&quot;bg_slider&quot;:false,&quot;keep_padding&quot;:false,&quot;hoverpause&quot;:false,&quot;show_slide_delay&quot;:0}\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><ul class='avia-slideshow-inner ' style='padding-bottom: 58.905852417303%;'><li  class='avia-slideshow-slide av-lnyde7bf-2a558524e03c85842e61ec73c53bfa78__0  av-single-slide slide-1 slide-odd'><div data-rel='slideshow-1' class='avia-slide-wrap '   ><div class='av-slideshow-caption av-lnyde7bf-2a558524e03c85842e61ec73c53bfa78__0 avia-caption'><div class=\"avia-inner-caption\"><h1 class='avia-caption-title '  itemprop=\"name\" >Qu\u2019est-ce que le diagnostic \u00e9lectronique ?<\/h1><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-15305 avia-img-lazy-loading-not-15305\"  src=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/DiagnosticElectronique-1.jpg\" width=\"786\" height=\"463\" title='DiagnosticElectronique' alt=''  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/DiagnosticElectronique-1.jpg 786w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/DiagnosticElectronique-1-300x177.jpg 300w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/DiagnosticElectronique-1-768x452.jpg 768w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/DiagnosticElectronique-1-705x415.jpg 705w\" sizes=\"(max-width: 786px) 100vw, 786px\" \/><\/div><\/li><\/ul><\/div><\/div>\n<div  class='flex_column av-2j0rtt-c92712d171751afbc2748f599efcdc20 av_one_full  avia-builder-el-2  el_after_av_one_full  el_before_av_textblock  first flex_column_div  column-top-margin'     ><\/div>\n<section  class='av_textblock_section av-lnyddkf8-013c8ad17daf4b18faf1f9568d00601b '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>De nos jours, il est presque impossible de rechercher une panne automobile \u00e0 l\u2019aveuglette, comme il y a vingt ans. Les voitures ont consid\u00e9rablement \u00e9volu\u00e9, la <strong>m\u00e9canique a presque disparu<\/strong> pour ne laisser <strong>place qu\u2019\u00e0 l\u2019\u00e9lectronique et aux outils technologiques<\/strong>. Les tableaux de bord sont d\u00e9sormais issus des derni\u00e8res technologies ainsi que certains organes de la voiture (frein \u00e0 main, aide \u00e0 la conduite&#8230;). Pour contr\u00f4ler ces v\u00e9hicules modernes, les m\u00e9caniciens ont d\u00fb s\u2019\u00e9quiper d\u2019<strong>appareils de diagnostic \u00e9lectronique<\/strong> permettant alors de d\u00e9tecter en un seul coup d\u2019\u0153il le moindre dysfonctionnement. <span style=\"text-decoration: underline;\"><span style=\"color: #3366ff;\"><a style=\"color: #3366ff; text-decoration: underline;\" href=\"https:\/\/www.avatacar.com\" rel=\"noopener noreferrer\">Avatacar<\/a><\/span><\/span> vous en dit plus sur cet outil devenu indispensable.<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.avatacar.com\/\"><img loading=\"lazy\" decoding=\"async\" class=\"avatacar_tracking_banner wp-image-18391 aligncenter\" src=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2024\/10\/banniererevision_positionhaut-300x37.jpg\" alt=\"\" width=\"3316\" height=\"409\" srcset=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2024\/10\/banniererevision_positionhaut-300x37.jpg 300w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2024\/10\/banniererevision_positionhaut.jpg 697w\" sizes=\"auto, (max-width: 3316px) 100vw, 3316px\" \/><\/a><\/p>\n<h2>Le diagnostic \u00e9lectronique, qu\u2019est-ce que c\u2019est ?<\/h2>\n<p>Afin d\u2019assurer le bon fonctionnement des voitures r\u00e9centes, les constructeurs utilisent une <strong>nouvelle technologie appel\u00e9e le multiplexage<\/strong>.\u00a0Elle permet d\u2019assurer la bonne <strong>communication entre les diff\u00e9rents ordinateurs qui g\u00e8rent les \u00e9l\u00e9ments \u00e9lectroniques<\/strong> de la voiture (tels que les \u00e9quipements de s\u00e9curit\u00e9, d\u2019aide \u00e0 la conduite et de confort).<\/p>\n<p>Le multiplexage a pour r\u00f4le d\u2019<strong>analyser l\u2019\u00e9tat de marche<\/strong> de ces ordinateurs. Ils transmettent les informations au garagiste via un seul support physique : l\u2019<strong>appareil de diagnostic \u00e9lectronique<\/strong> (ou testeur de diagnostic des centrales de commande). Les retours ainsi collect\u00e9s permettent d\u2019<strong>obtenir un diagnostic global<\/strong> de l\u2019\u00e9tat de la voiture. Le garagiste pourra ainsi effectuer les r\u00e9parations\/points de contr\u00f4le n\u00e9cessaires et remettre \u00e0 z\u00e9ro tous les ordinateurs lorsqu\u2019ils sont v\u00e9rifi\u00e9s.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-9655 aligncenter\" src=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/Appareil-diagnostic-electronique-300x200.jpg\" alt=\"\" width=\"402\" height=\"268\" srcset=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/Appareil-diagnostic-electronique-300x200.jpg 300w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/Appareil-diagnostic-electronique-768x512.jpg 768w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/Appareil-diagnostic-electronique.jpg 1000w\" sizes=\"auto, (max-width: 402px) 100vw, 402px\" \/><\/p>\n<h2>Comment marche l\u2019appareil de diagnostic \u00e9lectronique ?<\/h2>\n<p><span style=\"text-decoration: underline;\">Principe<\/span> : Si un des \u00e9l\u00e9ments \u00e9lectroniques vient \u00e0 dysfonctionner, l\u2019<strong>ordinateur associ\u00e9 \u00e9mettra un signal<\/strong>. Celui-ci sera ensuite per\u00e7u et retranscrit par l\u2019appareil de diagnostic \u00e9lectronique. Le garagiste est ainsi alert\u00e9 et peut effectuer le contr\u00f4le\/changement sur la pi\u00e8ce concern\u00e9e.<\/p>\n<p>Le diagnostic \u00e9lectronique a <strong>r\u00e9volutionn\u00e9 la gestion des \u00e9quipements \u00e9lectroniques <\/strong>et\u00a0totalement boulevers\u00e9 l\u2019entretien automobile. En effet, depuis son arriv\u00e9e, les voitures sont \u00e9quip\u00e9es de prises de diagnostic \u00e9lectronique permettant d\u2019<strong>acc\u00e9der \u00e0 la m\u00e9moire de l\u2019ensemble des ordinateurs de bord<\/strong> et d\u2019<strong>\u00e9tablir un diagnostic complet<\/strong> de la sant\u00e9 du v\u00e9hicule.<\/p>\n<p>Ce contr\u00f4le est g\u00e9n\u00e9ralement <strong>r\u00e9alis\u00e9 lors de la <span style=\"text-decoration: underline;\"><span style=\"color: #3366ff;\"><a style=\"color: #3366ff; text-decoration: underline;\" href=\"https:\/\/www.avatacar.com\/revision.htm\" rel=\"noopener noreferrer\">r\u00e9vision<\/a><\/span><\/span><\/strong>. L\u2019appareil de diagnostic \u00e9lectronique a la facult\u00e9 de d\u00e9tecter la moindre anomalie du syst\u00e8me, et ce m\u00eame si aucun voyant ne s\u2019est allum\u00e9 sur le tableau de bord auparavant. Le technicien n\u2019aura alors plus qu\u2019\u00e0 effectuer les interventions n\u00e9cessaires \u00e0 la r\u00e9solution de chaque probl\u00e8me.<\/p>\n<p>Fonctionnement d\u2019un appareil de diagnostic \u00e9lectronique Bosch :<br \/>\n<iframe loading=\"lazy\" title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/Z2qq-nxZPkw\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h2>Quels sont les points de contr\u00f4le du diagnostic \u00e9lectronique ?<\/h2>\n<p>En dehors des visites p\u00e9riodiques de maintenance (ou r\u00e9vision), l\u2019appareil de diagnostic \u00e9lectronique est indispensable pour :<\/p>\n<ul>\n<li>L\u2019historique des dysfonctionnements (ou erreurs) du v\u00e9hicule ;<\/li>\n<li>Remettre \u00e0 z\u00e9ro l\u2019indicateur de maintenance ;<\/li>\n<li>R\u00e9initialiser les capteurs de valves \u00e9lectroniques ;<\/li>\n<li>Param\u00e9trer les pressions de consigne lors du montage de pneus neige (sur les v\u00e9hicules \u00e9quip\u00e9s de valves \u00e9lectroniques) ;<\/li>\n<li>Reprogrammer les ordinateurs (ou calculateurs) apr\u00e8s le remplacement ou l\u2019entretien de pi\u00e8ces techniques comme la batterie ou le filtre \u00e0 particules (FAP) ;<\/li>\n<li>Remplacer int\u00e9gralement le liquide de freinage (sur tous les v\u00e9hicules \u00e9quip\u00e9s de blocs hydrauliques);<\/li>\n<li>Changer le frein de stationnement \u00e9lectrique (FSE) en toute s\u00e9curit\u00e9.<\/li>\n<\/ul>\n<p>Si vous avez des questions ou si vous souhaitez nous communiquer votre propre exp\u00e9rience, nous nous ferons un plaisir de vous r\u00e9pondre dans l\u2019espace commentaire.<\/p>\n<p><a href=\"https:\/\/www.avatacar.com\/\"><img loading=\"lazy\" decoding=\"async\" class=\"avatacar_tracking_banner aligncenter wp-image-18467\" src=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/bannieregarage_positionbas-300x69.jpg\" alt=\"\" width=\"1609\" height=\"370\" srcset=\"https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/bannieregarage_positionbas-300x69.jpg 300w, https:\/\/www.avatacar.com\/blog\/app\/uploads\/2021\/05\/bannieregarage_positionbas.jpg 568w\" sizes=\"auto, (max-width: 1609px) 100vw, 1609px\" \/><\/a><\/p>\n<p style=\"font-style: italic; font-size: 9px;\">Les conseils g\u00e9n\u00e9raux de cette rubrique sont donn\u00e9s \u00e0 titre indicatif. Avatacar ne garantit pas que la mise en \u0153uvre de l&rsquo;ensemble de ses conseils vous pr\u00e9munisse contre tout ennui technique concernant votre v\u00e9hicule, dont l&rsquo;\u00e9tat r\u00e9el n&rsquo;est pas v\u00e9rifiable par Avatacar.<\/p>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>Pour contr\u00f4ler nos autos les m\u00e9caniciens se sont \u00e9quip\u00e9s d\u2019appareils de diagnostic \u00e9lectronique d\u00e9tectant le moindre dysfonctionnement. Rendez-vous sur Avatacar<\/p>\n","protected":false},"author":3,"featured_media":13844,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-entretien-revision"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu&#039;est-ce que le diagnostic \u00e9lectronique ?<\/title>\n<meta name=\"description\" content=\"Pour contr\u00f4ler nos autos les m\u00e9caniciens se sont \u00e9quip\u00e9s d\u2019appareils de diagnostic \u00e9lectronique d\u00e9tectant le moindre dysfonctionnement. 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