{"id":9247,"date":"2026-04-12T11:35:46","date_gmt":"2026-04-12T15:35:46","guid":{"rendered":"https:\/\/gm-techlinkfrench.com\/?p=9247"},"modified":"2026-05-12T11:37:44","modified_gmt":"2026-05-12T15:37:44","slug":"verifier-le-connecteur-a-55-broches-si-des-codes-danomalie-dtc-relatifs-aux-bougies-de-prechauffage-sont-etablis","status":"publish","type":"post","link":"https:\/\/gm-techlinkfrench.com\/?p=9247","title":{"rendered":"V\u00e9rifier le connecteur \u00e0 55 broches si des codes d&#8217;anomalie (DTC) relatifs aux bougies de pr\u00e9chauffage sont \u00e9tablis"},"content":{"rendered":"<p>Plusieurs codes d&#8217;anomalie li\u00e9s aux bougies de pr\u00e9chauffage peuvent appara\u00eetre sur certains camions Silverado 2500HD\/3500HD et Sierra 2500HD\/3500HD des ann\u00e9es 2024 \u00e0 2026 \u00e9quip\u00e9s du moteur diesel Duramax de 6,6 litres (\u00e9quipement facultatif commun (RPO) L5P).<\/p>\n<p>Les codes d&#8217;anomalie (DTC) peuvent inclure :<\/p>\n<ul>\n<li>P066A (circuit de commande de bougie de pr\u00e9chauffage du cylindre 1 bas)<\/li>\n<li>P066C (circuit de commande de bougie de pr\u00e9chauffage du cylindre 2 bas)<\/li>\n<li>P066E (circuit de commande de bougie de pr\u00e9chauffage du cylindre 3 bas)<\/li>\n<li>P067A (circuit de commande de bougie de pr\u00e9chauffage du cylindre 4 bas)<\/li>\n<li>P067C (circuit de commande de bougie de pr\u00e9chauffage du cylindre 5 bas)<\/li>\n<li>P067E (circuit de commande de bougie de pr\u00e9chauffage du cylindre 6 bas)<\/li>\n<li>P068C (circuit de commande de bougie de pr\u00e9chauffage du cylindre 7 bas)<\/li>\n<li>P068E (circuit de commande de bougie de pr\u00e9chauffage du cylindre 8 bas)<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Ces codes d&#8217;anomalie peuvent \u00eatre dus \u00e0 un fusible grill\u00e9 ou \u00e0 une borne tordue au niveau du connecteur \u00e0 55 broches du X950D (faisceau de c\u00e2bles moteur-ch\u00e2ssis).<\/p>\n<p>Si le fusible F5 (F5BA) est coup\u00e9, cela entra\u00eenera l&#8217;enregistrement simultan\u00e9 de codes d&#8217;anomalie (DTC) sur les cylindres 1, 4, 6 et 7. Si le fusible F6 (F6BA) est coup\u00e9, cela entra\u00eenera l&#8217;enregistrement simultan\u00e9 de codes d&#8217;anomalie (DTC) sur les cylindres 2, 3, 5 et 8.<\/p>\n<p>Un endommagement des bornes du connecteur \u00e0 55 broches du X950D entra\u00eenera \u00e9galement l&#8217;activation de codes d&#8217;anomalie sp\u00e9cifiques.<\/p>\n<p><strong>CONSEIL :<\/strong> ne remplacer ni d\u00e9placer aucune bougie de pr\u00e9chauffage avant d&#8217;avoir v\u00e9rifi\u00e9 si le bloc-fusibles de l&#8217;unit\u00e9 de distribution de la batterie (BDU) (Fig. 1) pr\u00e9sente une borne tordue au niveau du connecteur \u00e0 55 broches du X950D.<\/p>\n<p style=\"text-align: center;\">\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-9250\" src=\"https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F01-Fuse-3.png\" alt=\"\" width=\"740\" height=\"480\" srcset=\"https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F01-Fuse-3.png 740w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F01-Fuse-3-300x195.png 300w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F01-Fuse-3-200x130.png 200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/p>\n<p style=\"text-align: center;\"><strong>Fig. 1<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>V\u00e9rifier si un fusible a saut\u00e9<\/strong><\/p>\n<p>V\u00e9rifier la pr\u00e9sence d&#8217;une tension de 12 volts au niveau de la cosse \u00e0 anneau de l&#8217;unit\u00e9 de distribution de batterie (BDU) tout en remuant l\u00e9g\u00e8rement le c\u00e2ble (Fig. 2). Dans certains cas de fusible grill\u00e9, le contact peut s&#8217;\u00e9tablir de mani\u00e8re intermittente. Si le contact du fusible est intermittent ou si le fusible a saut\u00e9, il peut \u00eatre n\u00e9cessaire de remplacer l&#8217;ensemble de l&#8217;unit\u00e9 de distribution de batterie (BDU).<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-9249\" src=\"https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1-1024x734.png\" alt=\"\" width=\"740\" height=\"530\" srcset=\"https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1-1024x734.png 1024w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1-300x215.png 300w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1-768x550.png 768w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1-780x559.png 780w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1-1160x831.png 1160w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F02-Fuse-1.png 1200w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/p>\n<p style=\"text-align: center;\"><strong>Fig. 2<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>D\u00e9tacher le connecteur X950D en d\u00e9gageant l&#8217;assurance de position de connecteur (CPA) rouge et en pressant les coins du connecteur. V\u00e9rifier si des bornes du connecteur X950D (Fig. 3) sont tordues, ce qui pourrait entra\u00eener l&#8217;apparition des codes d&#8217;anomalie (DTC) P0671, P0672, P0673, P0674, P0675, P0676, P0677 et\/ou P0678 relatifs au circuit de commande des bougies de pr\u00e9chauffage.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-9248\" src=\"https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F03-Fuse-2-1024x688.png\" alt=\"\" width=\"740\" height=\"497\" srcset=\"https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F03-Fuse-2-1024x688.png 1024w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F03-Fuse-2-300x202.png 300w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F03-Fuse-2-768x516.png 768w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F03-Fuse-2-780x524.png 780w, https:\/\/gm-techlinkfrench.com\/wp-content\/uploads\/2026\/05\/F03-Fuse-2.png 1123w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/p>\n<p style=\"text-align: center;\"><strong>Fig. 3<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Pour de plus amples renseignements, se reporter au bulletin n\u00b0 26-NA-077.<\/p>\n<p>&nbsp;<\/p>\n<p><em>&#8211; Merci \u00e0 Larry Yaw<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Plusieurs codes d&#8217;anomalie li\u00e9s aux bougies de pr\u00e9chauffage peuvent appara\u00eetre sur certains camions Silverado 2500HD\/3500HD et Sierra 2500HD\/3500HD des ann\u00e9es 2024 \u00e0 2026 \u00e9quip\u00e9s du moteur diesel Duramax de 6,6 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89],"tags":[],"class_list":["post-9247","post","type-post","status-publish","format-standard","hentry","category-2026-april"],"_links":{"self":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/9247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9247"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/9247\/revisions"}],"predecessor-version":[{"id":9251,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/9247\/revisions\/9251"}],"wp:attachment":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}