Converted from a dbw_mkz_msgs SteeringReport message.
http://docs.ros.org/api/dbw_mkz_msgs/html/msg/SteeringReport.html

steering_wheel_angle (rad)
steering_wheel_angle_cmd (rad)
steering_wheel_torque (Nm)
speed (m/s)
fault_wdc (bool)
fault_bus1 (bool)
fault_bus2 (bool)
fault_calibration (bool)
