Passive Open Liftgate

Pressing the liftgate release switch when liftgate is closed indicates the operator's intent to open the liftgate and thus triggers the system. Subsequently, the SMK ECU sends a LF-challenge to the SMART KEY FOB via the exterior bumper antenna. The SMART KEY FOB answers with a RF-response. If the received response matches the expected answer, SMK ECU sends a "liftgate open" message via the CAN network.