Passive Open Trunk
WARNING: This page is about a different car, the 2016 Kia Soul EV. However, it is still accessible from the selected car via links, so may be relevant.
Pressing the Trunk/Tailgate Lid Switch when Trunk/Tailgate is closed indicates the operators intention to open the Trunk/Tailgate and thus triggers the system. Subsequently, the SMK ECU sends an LF-challenge to the SMART KEY FOB via the exterior bumper antenna. The SMART KEY FOB answers with an RF-response. If the received response matches the expected answer, SMK ECU sends a "Trunk/Tailgate open" message via the CAN network.