Patent ID: 9403412
Filing Date: 2016-08-02
CPC Classification: B60D,G01R

Claim Text:
1. A method of recognizing a trailer of a tractor vehicle by an electronic control unit (ECU), the method comprising steps of: determining whether a parking switch is in an on state, and a transmission gear state is a parking state; determining whether a stop lamp switch of the trailer is in an on state, and a state of a current flowing in a stop lamp of the trailer to determine whether the stop lamp is in an on state when it is determined that the transmission gear state is not the parking state; releasing a hold state of a diagnosis of whether the trailer is connected when the stop lamp switch of the trailer is in the on state and the stop lamp is in the on state; recognizing a load current quantity of a load lamp and determining whether the stop lamp is in an open state; and determining a mode as a trailer non-connection mode when the stop lamp is in an off state.