With Intelligent Access (IA)

The smart unlock feature prevents the doors from electronically locking when an IA  key is left inside the vehicle. When the Remote Function Actuator (RFA) module receives a lock command from a door lock control switch, and an IA  key is inside the vehicle with one of the doors open, the RFA  module commands all of the doors to unlock and the horn will chirp. To override the smart unlock feature and intentionally lock a key in the vehicle, close all of the doors and lock the vehicle using the keyless entry keypad, press the lock button on another IA  key, or lock the doors manually with the lock rod before closing the door.