How does the vehicle know a trailer is connected?
This happens in a number of ways but the most common method is a signal generated by the towing module, which is recognised by the central computer. The signal is sent when a tow plug is inserted into the socket. Trailer Detection can also activate other features associated with towing. For systems such as TSP to operate it is essential to have a towbar wiring kit installation which communicates directly on the CAN bus.
