Aller au contenu

U0183 Élevée Générique / SAE

U0183: Perte de communication avec le calculateur A d'éclairage arrière

WhatsApp Telegram X E-mail

Que faire

Before you drive anywhere, get somebody to stand behind the car while you work through the brake pedal, the indicators, the hazards, the lights, the fog light and reverse gear.

That is not a formality. Every light this fault affects is behind you, so you cannot see any of them. A headlight that fails is obvious the first time it is dark. Brake lights that have stopped working are invisible to you and remove the only warning the driver behind gets. In most places driving without them is also an offence.

Then, if you tow: unplug the trailer or caravan and see whether the fault clears. On most cars the same computer runs the trailer socket and checks its bulbs, so a fault in the trailer, a wrong bulb, or a towing kit spliced into the wiring rather than fitted properly will produce this code with nothing wrong on the car at all. That test is free and settles a lot of these.

Otherwise, look under the boot floor where the spare wheel lives. Standing water there — from an aged tailgate seal, a blocked drain or a hardened rear light gasket — is a very common cause. And if the fault comes and goes, open and close the tailgate slowly and watch, because the wiring runs through the hinge and flexes every time.

If any brake light, indicator or rear light is not working, the car should not be driven until it is fixed.

Ce que signifie ce code

The rear lighting control module has stopped being heard from. The general reasoning is at U0100, module B is at U0252, and U0484 covers the same module reporting implausibly instead.

This code carries a higher severity than the rest of the lighting family for one reason, and it is worth stating without decoration: the driver cannot see any of the lights this module operates.

Brake lights, indicators, tail lights, fog lights and reversing lights are all behind the driver. A headlight that fails announces itself on the first dark road. A brake light that fails announces itself to nobody at all — and a vehicle braking with no brake lights removes the only warning the driver behind gets.

So the first action is to have somebody stand behind the vehicle and go through every function. It takes a minute and it is the whole safety content of this page. In most jurisdictions driving without working brake lights or indicators is also an offence.

Then one free test resolves a large share of these. On most vehicles the rear lighting module also drives the trailer socket and performs its bulb-failure detection. Unplug the trailer, clear the code and see whether it returns — if it does not, the fault is in the trailer or its wiring rather than the vehicle, which is a far cheaper conversation. A towing loom spliced into the harness rather than fitted through the vehicle's proper interface is a leading cause, and it is the same argument as U0137.

After that, the rear of the vehicle's usual list: water reaching the module through an aged tailgate seal or a hardened light cluster gasket — lift the boot floor and look under the spare wheel — connectors behind the rear trim disturbed for boot liners and audio work, and the harness through the tailgate hinge, which flexes like a door boot and fails the same way.

And the same expensive note as U0182 applies: rear clusters are increasingly sealed LED assemblies, so establish whether the fault is the module, the wiring or the lamp before an assembly is ordered.

Causes probables

Commencez ici

Moins fréquent

Symptômes

Composants concernés

Des informations, pas des instructions

CarGeek est un ouvrage de référence, pas un manuel d'atelier. Ses pages sont rédigées à partir de sources publiques et de ce que d'autres ont constaté, jamais à partir de la documentation technique du constructeur ; elles peuvent donc être erronées ou incomplètes pour votre véhicule précis. Une partie de ce qu'elles décrivent présente un risque réel : haute tension, carburant sous pression, énergie accumulée, pièces chaudes ou en mouvement.

Avant d'agir sur quoi que ce soit, faites-le vérifier par une personne formée, en suivant la procédure du constructeur pour votre véhicule. Rien ici ne remplace cette procédure.

Expérience de la communauté

Soyez le premier à en faire le compte rendu

Rien n'a encore été publié à ce sujet. Tout ce que vous avez trouvé mérite d'être noté — même une impasse épargne à quelqu'un le même après-midi.

Ce qui rend un compte rendu utile :

  • La voiture — marque, modèle, année et moteur. La même panne ne se comporte pas pareil sur chacune.
  • Ce que vous avez mesuré, pas seulement ce que vous avez remplacé.
  • Ce qui a réellement résolu le problème — ou que rien ne l’a résolu, ce qui est utile aussi.

Se connecter ou créer un compte pour ajouter ce que vous avez trouvé à propos de U0183.