Brief component description

Pressing the button prompts the fully automatic inwards or outwards pivoting movement of the ball head as far as each end position. Two colored LEDs are integrated into the button (green and red). The indicator light shows the system status.

The tailgate or the rear window must be open when the trailer tow hitch is operated.

The microswitch for trailer detection is built into the trailer socket. If the connector is inserted in the trailer socket, the ball head cannot be pivoted in.

The hall effect sensor is integrated into the powertrain. The entire pivoting angle of the ball head is monitored with the aid of the Hall effect sensor. The spindle's rotary movement is transmitted by the Hall effect sensor to the control unit for the fully automatic trailer tow hitch in the form of a Hall effect sensor signal. In parallel to the hall effect sensor signals, the control unit measures the current required for the pivoting movement. If the permissible current consumption of the DC motor is exceeded during fully automatic pivoting out or in, or no hall effect sensor signals are emitted, the ball head's pivoting movement is halted. The ball head is pivoted back a short way in the opposite direction (reversed).

The control unit energizes the powertrain's direct current motor. The control unit has no direct connection to the bus system and cannot be programmed.

The trailer module (AHM) is connected to the control unit for the full automatic trailer tow hitch via the LIN bus. In the event of a system fault, the trailer module will generate a Check Control message. The trailer module is also used for trailer detection. The trailer module identifies a trailer as connected if load is detected least twice at the lighting outputs.