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:

Matting Component -LVM 769 810 A2
Definition: Matting Component -LVM 769 810 A2- Edition 10/2014 Product Description With two-part HS clear coats and two-part HS top coat, the Matting Component - LVM 769 810 ...

Tires and Rims, Matching
If necessary repair flat spots from standing. Refer to → Chapter „Flat Spots, Correcting“. – Dismount the tire. Refer to → Chapter „Tires, Dismounting“. – Turn the ...

Electrically-Driven A/C Compressor for High Voltage System
Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system. Only use tools and materials approved by the manufactu ...