Without Intelligent Access (IA)
WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The BCM receives a power liftgate activation command (double press) from the Remote Keyless Entry (RKE) transmitter. The BCM sends a signal to the LTM over a hardwired circuit. The signal transmitted between the BCM and the LTM is not specific to the open or close operation. The LTM determines which operation to carry out depending on the liftgate position when the signal is received.