Trunk Open Function

When pressing the trunk button of the Intelligent Key, the trunk open signal is sent from the Intelligent Key to the Intelligent Key unit.
Intelligent Key unit sends trunk open request signal to BCM via CAN communication line once the trunk request switch is pressed and sounds the horn (Engine room) 4 times at the same time.
When BCM receives the trunk open request signal, it operates the trunk lid opener actuator and opens the trunk.