VW Polo manuals

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:

Indicator lamp in the vehicle key
Fig. 20 Indicator lamp in the vehicle key First read and observe the introductory information and safety warnings If a button on the vehicle key is pressed briefly, the indicator lamp (arrow) flashes once. The lamp will flash several times if the button is pressed and held, e.g. convenien ...

Introduction
This chapter contains information on the following subjects:  → Handling wheels and tyres  → Rims  → New wheels and tyres  → Tyre pressure  → Tread depth and wear indicators  → Tyre damage  → Spare wheel or temporary spare wheel   ...

Wheel Bolt Versions
Shank Designs There are two shank designs: rounded and conical.     The rounded shank has a curved surface -arrow A-. This design was used for original rims. The conic ...

© 2016-2025 Copyright www.vwpolo.net