Towing / Trailer System: Description and Operation

Towing Recognition Control Module (J345)

The Towing Recognition Control Module - arrow - is located behind the left luggage compartment side trim.

Through MY 2009





From MY 2010





General Information

Use the Power Outlet Tester (V.A.G 1537/A) to test the towing recognition control module.

The towing recognition control module detects from a performance decrease in the"towing mode" of at least 5 W and sends this information to diverse control modules via CAN-Bus. At least the turn signal or parking lamp must be switched on to detect "use of trailer".

The towing recognition control module is supplied with information (light control) from the Vehicle Electrical System Control Module (J519) and Comfort System Central Control Module (J393) via the CAN databus.

DTC Recognition and Display

The towing recognition control module is equipped with OBD.

Use the Vehicle Diagnosis, Testing and Information System (VAS 5051B) under "Guided Fault Finding".

Additional information:

• Refer to the Owner's Manual.

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