OBD protocol with si9241

Can anybody help me with this comunication?

I´m using Si9241A Single-Ended Bus Transceiver - Vishay for communication between speedometer and VDO 1390 Tachograph. Baud rate is 10,400 baud. Protocol iso9241.

Regards,

Ruberli de Lima - São Paulo - Brazil

Can anybody help me with this comunication?

And the problem is?