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Volkswagen Polo Service & Repair Manual: Towing Recognition Control Module -J345

Volkswagen Polo Service & Repair Manual / Towing Guide / Technical Requirements / Towing Recognition Control Module -J345

General Information
The Towing Recognition Control Module -J345- recognizes “trailer mode” when there is a power decrease of at least 5 W → Note and transmits this information to various control modules via the CAN data bus.
The Vehicle Electrical System Control Module -J519- and the Comfort System Central Control Module -J393- supply the Towing Recognition Control Module -J519- with information via the CAN data bus.
1)  At least turn signals or side marker lamps must be switched on to detect “trailer mode”.
For information on testing control modules, diagnosing malfunctions, malfunction indicators and fault finding. Refer to → Electrical Equipment; Rep. Gr.97.
   
Towing Recognition Control Module -J345-, Retrofitting
Retrofitting a Towing Recognition Control Module -J345- approved by Volkswagen is possible, but it can pose problems due to the connection with the vehicle CAN data bus. The control module must then be coded in “Guided Fault Finding” using the → Vehicle diagnostic tester.
  Note
Installation of control module solutions that are available from third parties and are not approved by Volkswagen is not recommended. Installing such equipment voids the warranty. Generally, these are connected to the tail lamps and not integrated into the vehicle electrical system. This can result in a misdiagnosis from the lamp monitoring function or to malfunctions. Also, dimmed bulbs such as combined brake and tail lamps cannot be activated.
   

Towing Recognition Control Module -J345-, Coding

Refer to → Electrical Equipment; Rep. Gr.97 finformation on coding.

13-Pin« Trailer Socket
The backup lamps, »continuous current« and charging cable can be used on the trailer with the »13-pin« trailer socket. A »13-pin« trailer socket is re ...

Engine Cooling
Because towing places higher demands on the engine cooling system, the cooling system is enhanced in vehicles that have factory-installed trailer hitches, if necessar ...

Other materials:

Stowage compartment in the front centre armrest
Fig. 96 Stowage compartment in the front centre armrest First read and observe the introductory information and safety warnings To open, press the release button in the centre armrest (arrow) and lift the cover all the way up. To close, guide the cover down. WARNING The centre armrest ...

Contact Housings, Repairing Wire Terminals
  Note     For technical reasons, the contact housing for the wire terminals can be supplied only with the contacts pushed in. These contacts can be removed at every other contact housing ...

Switching the TCS on and off
Fig. 116 In the centre console: button for switching the TCS on and off manually First read and observe the introductory information and safety warnings The electronic stability control (ESC) only functions when the engine is running. It consists of ABS, EDL and TCS. When the engine is r ...

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