{"id":7947,"date":"2023-03-08T13:00:18","date_gmt":"2023-03-08T18:00:18","guid":{"rendered":"https:\/\/gm-techlinkfrench.com\/?p=7947"},"modified":"2023-05-08T15:23:42","modified_gmt":"2023-05-08T19:23:42","slug":"obturateurs-de-calandre-actifs-bruit-a-lavant","status":"publish","type":"post","link":"https:\/\/gm-techlinkfrench.com\/?p=7947","title":{"rendered":"Obturateurs de calandre actifs &#8211; Bruit \u00e0 l&#8217;avant"},"content":{"rendered":"<p style=\"font-weight: 400;\">Certains mod\u00e8les 2021-2023 Escalade, Silverado, Tahoe, Suburban, Sierra et Yukon peuvent produire un bruit sourd, un claquement ou un cliquetis \u00e0 l&#8217;avant du v\u00e9hicule. (Fig. 1) Cela peut \u00e9galement \u00eatre ressenti au niveau de la p\u00e9dale de frein ou sur le plancher, \u00e0 l&#8217;avant de l&#8217;habitacle. Le probl\u00e8me survient g\u00e9n\u00e9ralement apr\u00e8s que le v\u00e9hicule a roul\u00e9 \u00e0 au moins 45 mph puis s&#8217;est arr\u00eat\u00e9, ou apr\u00e8s que la p\u00e9dale de frein a \u00e9t\u00e9 rel\u00e2ch\u00e9e apr\u00e8s un arr\u00eat.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-17310\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2023\/03\/F01-Active-shutter-3.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 1<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">Le bruit \u00e0 l&#8217;avant peut provenir de d\u00e9bris de la route ou d&#8217;un composant entrant en contact avec les volets actifs de la calandre lorsqu&#8217;ils s&#8217;ouvrent et se ferment.<\/p>\n<p style=\"font-weight: 400;\">Le syst\u00e8me d&#8217;obturation active de la calandre ferme les volets de la calandre pour am\u00e9liorer l&#8217;a\u00e9rodynamisme du v\u00e9hicule dans les situations de conduite o\u00f9 les charges de refroidissement et de climatisation sont relativement faibles et o\u00f9 des niveaux \u00e9lev\u00e9s de flux d&#8217;air \u00e0 l&#8217;avant ne sont pas n\u00e9cessaires. Si un d\u00e9bit d&#8217;air \u00e9lev\u00e9 est n\u00e9cessaire, le syst\u00e8me d&#8217;obturation de la grille active ouvrira un ou les deux volets, si le v\u00e9hicule en est \u00e9quip\u00e9. Si les conditions d&#8217;ouverture des volets sont r\u00e9unies, le module de commande ordonne aux actionneurs des volets d&#8217;air de la grille active d&#8217;ouvrir l&#8217;un des volets ou les deux.<\/p>\n<p style=\"font-weight: 400;\">Pour d\u00e9terminer la cause du bruit, avec les volets ouverts, retirer le fusible qui alimente l&#8217;actionneur des volets actifs de la calandre. Une fois le fusible retir\u00e9, tester le v\u00e9hicule pour voir si le bruit persiste.<\/p>\n<p style=\"font-weight: 400;\">Si le bruit n&#8217;est pas pr\u00e9sent, retirer l&#8217;\u00e9cran de protection de l&#8217;air d&#8217;admission (Fig. 2, n\u00b0\u00a02) et inspecter les volets de la grille active pour voir s&#8217;il n&#8217;y a pas d&#8217;\u00e9l\u00e9ments qui pourraient entrer en contact.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-17311\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2023\/03\/F02-Active-shutter-splash-shield-2.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 2<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\">Des \u00e9l\u00e9ments tels que des d\u00e9bris de la route, des pierres, de la glace, un support de klaxon mal positionn\u00e9 ou un conduit d&#8217;air d&#8217;admission mal fix\u00e9 peuvent entrer en contact avec les volets (Fig. 3, n\u00b0 2) et provoquer le bruit.<\/p>\n<p style=\"font-weight: 400;\">Pour plus d&#8217;information, se reporter au PIT5986.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400; text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-17312\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2023\/03\/F03-Active-shutter-1.png\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 3<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"font-weight: 400;\"><em>&#8211; Merci \u00e0 Jim Will<\/em><\/p>\n<p style=\"font-weight: 400;\"><em>\u00a0<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Certains mod\u00e8les 2021-2023 Escalade, Silverado, Tahoe, Suburban, Sierra et Yukon peuvent produire un bruit sourd, un claquement ou un cliquetis \u00e0 l&#8217;avant du v\u00e9hicule. (Fig. 1) Cela peut \u00e9galement \u00eatre [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50],"tags":[],"class_list":["post-7947","post","type-post","status-publish","format-standard","hentry","category-2023-march"],"_links":{"self":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/7947","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=7947"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/7947\/revisions"}],"predecessor-version":[{"id":7949,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/7947\/revisions\/7949"}],"wp:attachment":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}