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:

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Fig. 178 Rear view of the right-hand H4 headlight with plastic covers: ① dipped beam and main beam, ② turn signal and ③ side light Fig. 179 Rear view of the right-hand H4 headlight with rubber cover: ① dipped beam and main beam, ② turn signal and ③ side light First read and o ...

Brake fluid
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Flat Spots, Correcting
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