Nissan Maxima Owners Manual: Locking doors
1. Place the ignition switch in the LOCK position.
2. Close all doors.
3. Press the button on the Intelligent Key.
4. The hazard warning lights flash twice, the horn beeps once, and the front and tail lights will turn on for 10 seconds.
5. All doors will be locked.
After locking the doors using the Intelligent Key, be sure that the doors have been securely locked by operating the door handles.