WARNING: This page is about a different car, the 2013 Kia Sportage and 2012 Kia Sportage. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Scantool Display - CAN Low/High Signal Waveform
Courtesy of KIA MOTORS AMERICA, INC.
Fig 2: Scantool Display - CAN Bus Voltage Level (Low Speed CAN)