it seems some settings in the DriveByWire.dbc file are incorrect/outdated:
.) Message Throttle_Report: datasheet BrakeThrottle-By-Wire says signals PI/PC/PO are in percent, the same is true for the dbc-file but the factor is set to 1/65535 (should be 100/65535?). Similar for Brake/Throttle _Command/Report messages.
.) Message GPS 2: YEAR has a length of 7 bits in the Steer-By-Wire datasheet, but the dbc-file specifies a length of 5.