Volkswagen Polo Service & Repair Manual: Towing Recognition Control Module -J345
| 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. |
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| Towing Recognition Control Module
-J345-, Retrofitting |
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| 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. |
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Towing Recognition Control Module -J345-, Coding
Refer to
→ Electrical Equipment; Rep. Gr.97 finformation on coding.
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 ...
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:
Checklist
Never carry out any work on the engine or in the engine compartment
if you are not familiar with the requisite procedures and general safety requirements,
or if you only have access to incorrect operating equipment, service fluids,
and unsuitable tools . The work should be carried ou ...
Introduction
This chapter contains information on the following subjects:
→ Information stickers and plates
→ Using the vehicle in other countries and continents
→ Radio reception and aerials
→ Volkswagen repair information
→ Declaration of conformity
→ ...
Introduction
This chapter contains information on the following subjects:
→ Preparations for changing a wheel
→ Wheel bolts
→ Lifting the vehicle with the jack
→ Changing a wheel
→ After changing a wheel
Some models are delivered without a factory-fitted jack or ...
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13-Pin« Trailer Socket
Engine Cooling