Power Door Lock Operation
WARNING: This page is about a different car, the 2004 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
When the keyfob sends a LOCK signal with the key switch in the REMOVED position (key is not in ignition key cylinder), the smart entrance control unit locks all doors.
When the keyfob sends an UNLOCK signal once, the smart entrance control unit unlocks the front door LH.
Then, if the keyfob sends another UNLOCK signal within 5 seconds, the smart entrance control unit unlocks all other doors.