Dodge 2015 Dart - Owner Manual - Manual (Page 44)

To Lock The Vehicle’s Doors
With one of the vehicle’s Passive Entry RKE transmitters
within 5 ft (1.5 m) of the driver or passenger front door
handles, push the door handle LOCK button to lock all
four doors.
Do NOT grab the door handle, when pushing the door
handle button. This could unlock the door(s).
Push The Door Handle Button To Lock
42 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE