This signal is transmitted from vehicle to DCU within the message Veh_DCU_#1:

Signal value	Description
0	No request.
1	Open request (Both leafs).
10	Open request (left leaf).
11	Open request (Rear leaf).
100	Close request (Both leafs).
101	Close request (Left leaf).
110	Close request (Rear leaf).
111	Stop request (Both leafs).
1000	Stop request (Left leaf).
1001	Stop request (Rear leaf).
1010	Learn request (Both leafs).
1011	Learn request (Left leaf).
1100	Learn request (Rear leaf).