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Trois familles couvrent l’essentiel des besoins d’un particulier.","text","ltr",{"tag":92,"type":93,"format":10,"indent":80,"version":81,"children":94,"direction":90},"h2","heading",[95],{"mode":87,"text":96,"type":89,"style":10,"detail":80,"format":80,"version":81},"Ce que tout véhicule récent sait dire : l’EOBD",{"type":84,"format":10,"indent":80,"version":81,"children":98,"direction":90,"textFormat":80},[99],{"mode":87,"text":100,"type":89,"style":10,"detail":80,"format":80,"version":81},"Depuis 2001 pour les moteurs essence et 2004 pour les diesel, toute voiture vendue en Europe embarque un diagnostic normalisé, l’EOBD, accessible par une prise OBD2 à 16 broches située sous le volant. Il donne les codes défaut du moteur, ses données en temps réel et l’état des systèmes antipollution. N’importe quel outil OBD2 y accède, quelle que soit la marque.",{"type":84,"format":10,"indent":80,"version":81,"children":102,"direction":90,"textFormat":80},[103],{"mode":87,"text":104,"type":89,"style":10,"detail":80,"format":80,"version":81},"Un véhicule 100 % électrique n’y est pas soumis : sans moteur thermique, un outil générique n’y lit presque rien.",{"tag":92,"type":93,"format":10,"indent":80,"version":81,"children":106,"direction":90},[107],{"mode":87,"text":108,"type":89,"style":10,"detail":80,"format":80,"version":81},"Les adaptateurs OBD2 (ELM327)",{"type":84,"format":10,"indent":80,"version":81,"children":110,"direction":90,"textFormat":80},[111],{"mode":87,"text":112,"type":89,"style":10,"detail":80,"format":80,"version":81},"Un petit boîtier branché sur la prise, qui dialogue en Bluetooth avec une application sur smartphone. C’est la solution la moins chère pour lire un voyant moteur. Sa limite tient à l’application : une application générique ne voit que le moteur ; les applications spécialisées par marque vont plus loin, souvent contre paiement.",{"tag":92,"type":93,"format":10,"indent":80,"version":81,"children":114,"direction":90},[115],{"mode":87,"text":116,"type":89,"style":10,"detail":80,"format":80,"version":81},"Les lecteurs de codes à écran",{"type":84,"format":10,"indent":80,"version":81,"children":118,"direction":90,"textFormat":80},[119],{"mode":87,"text":120,"type":89,"style":10,"detail":80,"format":80,"version":81},"Alimentés par la prise OBD, sans smartphone ni batterie : on branche, on lit, on efface. Ils se limitent eux aussi au calculateur moteur. 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