{"id":7470,"date":"2021-04-26T16:30:33","date_gmt":"2021-04-26T20:30:33","guid":{"rendered":"https:\/\/techlinkfrench.mynetworkcontent.com\/?p=7470"},"modified":"2021-05-26T17:13:25","modified_gmt":"2021-05-26T21:13:25","slug":"performance-du-debitmetre-dair-massique-2","status":"publish","type":"post","link":"https:\/\/gm-techlinkfrench.com\/?p=7470","title":{"rendered":"Performance du d\u00e9bitm\u00e8tre d&#8217;air massique"},"content":{"rendered":"<p>Certains mod\u00e8les Silverado et Sierra 2019-2021 \u00e9quip\u00e9s d&#8217;un moteur V8 de 5,3 litres (EFC L82, L84) ou d&#8217;un moteur V8 de 6,2 litres (EFC L87) peuvent avoir un t\u00e9moin MIL de v\u00e9rification du moteur allum\u00e9 et un code d&#8217;anomalie P1682 (circuit 2 du commutateur d&#8217;allumage 1) m\u00e9moris\u00e9 dans le module de commande du moteur (ECM) comme code actif ou historique. Codes d&#8217;anomalie P0101 (performance du capteur MAF), P0689 (basse tension du circuit de retour du relais d&#8217;allumage des commandes du moteur). Les codes d&#8217;anomalie P16A7 (circuit de retour 2 du relais d&#8217;allumage des commandes du moteur) ou P16BC (circuit de retour 3 du relais d&#8217;allumage des commandes du moteur) peuvent \u00e9galement \u00eatre m\u00e9moris\u00e9s. De plus, sur le v\u00e9hicule, le d\u00e9bitm\u00e8tre d&#8217;air massique (MAF) peut avoir \u00e9t\u00e9 remplac\u00e9 pr\u00e9c\u00e9demment cause du code d&#8217;anomalie P0101. Ces conditions peuvent \u00eatre caus\u00e9es par une connexion endommag\u00e9e dans le connecteur X3 du centre \u00e9lectrique \u00e0 bus du compartiment moteur (UBEC) \u00e0 la position H6, ce qui peut entra\u00eener la m\u00e9morisation simultan\u00e9e des codes d&#8217;anomalie P1682 et P0101.<\/p>\n<p>Ne pas remplacer le capteur MAF si ces codes d&#8217;anomalie sont m\u00e9moris\u00e9s. Inspecter les connexions de fil \u00e0 borne \u00e0 l&#8217;int\u00e9rieur du connecteur X3 de l&#8217;ensemble UBEC pour d\u00e9tecter les signes de branchement marginal ou de fils desserr\u00e9s, en particulier le double sertissage \u00e0 l&#8217;emplacement X3-H6. (Fig. 6)<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14620\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F06-MAF-1.png\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F06-MAF-1.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F06-MAF-1-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F06-MAF-1-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F06-MAF-1-200x130.png 200w\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 6<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Si la connexion du fil \u00e0 double sertissage est m\u00e9diocre (Fig. 7), r\u00e9parer le fil. Se reporter \u00e0 R\u00e9paration des bornes du connecteur dans les informations d&#8217;entretien appropri\u00e9es.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14621\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F07-MAF-2.png\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F07-MAF-2.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F07-MAF-2-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F07-MAF-2-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F07-MAF-2-200x130.png 200w\" alt=\"\" width=\"740\" height=\"480\" \/><strong>Fig. 7<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Si le fil \u00e0 double sertissage ne pr\u00e9sente aucun signe de connexion m\u00e9diocre (Fig. 8) ou si aucun probl\u00e8me n&#8217;est constat\u00e9 au niveau des connexions de fil \u00e0 borne, continuer \u00e0 diagnostiquer les codes d&#8217;anomalie avant de remplacer le capteur MAF.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14622\" src=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F08-MAF-3.png\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F08-MAF-3.png 740w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F08-MAF-3-300x195.png 300w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F08-MAF-3-85x55.png 85w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2021\/04\/F08-MAF-3-200x130.png 200w\" alt=\"\" width=\"740\" height=\"481\" \/><strong>Fig. 8<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Pour plus de renseignements, se reporter au bulletin n\u00b0 21-NA-032.<\/p>\n<p>&nbsp;<\/p>\n<p><em>&#8211; Merci \u00e0 Dave MacGillis<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Certains mod\u00e8les Silverado et Sierra 2019-2021 \u00e9quip\u00e9s d&#8217;un moteur V8 de 5,3 litres (EFC L82, L84) ou d&#8217;un moteur V8 de 6,2 litres (EFC L87) peuvent avoir un t\u00e9moin MIL [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-7470","post","type-post","status-publish","format-standard","hentry","category-2021-april"],"_links":{"self":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/7470","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=7470"}],"version-history":[{"count":1,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/7470\/revisions"}],"predecessor-version":[{"id":7471,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=\/wp\/v2\/posts\/7470\/revisions\/7471"}],"wp:attachment":[{"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlinkfrench.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}