Power Door Lock Operation
WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
BCM receives a LOCK signal from key fob. BCM locks all doors with input of LOCK signal from key fob.
When an UNLOCK signal is sent from key fob once, driver's door is unlocked.
Then, if an UNLOCK signal is sent from key fob again within 5 seconds, passenger door is unlocked.