WARNING: This page is about a different car, the 2015 Kia Forte5, 2015 Kia Forte Koup, and 2015 Kia Forte. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Audio Remote Control System Schematic (1 Of 4)
Courtesy of KIA MOTORS AMERICA, INC.
Fig 2: Audio Remote Control System Schematic (2 Of 4)
Courtesy of KIA MOTORS AMERICA, INC.
Fig 3: Audio Remote Control System Schematic (3 Of 4)
Courtesy of KIA MOTORS AMERICA, INC.
Fig 4: Audio Remote Control System Schematic (4 Of 4)