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Coding trailer detector control unitJ345 > < Trailer detector control unitJ345

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Retrofitting trailer detector control unitJ345
Retrofitting trailer detector control unit -J345-
Retrofitting a trailer detector control unit -J345- is possible in essence but not easy because it has to be connected to the CAN data bus of the vehicle. The control unit then has to be coded with the aid of „Guided fault finding“ → Vehicle diagnostic tester.
  Note
It is recommended that alternative control units available on the open market and not approved by Volkswagen are avoided without exception. If equipment of this type is installed, the guarantee will become void. Generally, these are connected to the tail lights and not integrated in the electrical system of the vehicle, which makes far more sense. The consequence is that faulty diagnoses in the bulb failure warning system or malfunctions can occur, among other things. Furthermore, dimmed bulbs (combined brake and tail light) cannot be actuated.
   

Coding trailer detector control unitJ345 > < Trailer detector control unitJ345