With IA

If the doors were not previously electronically unlocked when the liftgate switch is pressed, the RFA  module activates the liftgate IA  feature. If the RFA  module detects a programmed IA  key, the RFA  module sends a signal over the MS-CAN  to the LTM  to open the liftgate. Any subsequent presses of the switch stops the motion or opens the liftgate.

If the doors were previously electronically unlocked when the liftgate switch is pressed, the RFA  module sends a signal to the LTM  over a hardwired circuit which opens or stops the motion of the liftgate.