The security alarm has four modesThe security alarm has four modes  - Security alarm system - Locking and unlocking - Mitsubishi Lancer Owner's Manual - Mitsubishi Lancer

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Door ajar warning display screen (when the ignition switch is “ON”)
If any of the doors or the rear hatch is not completely closed, this displays the open door or rear hatch. If the vehicle speed exceeds approximately 8 km/h (5 mph) while a door is ajar, a buzz ...

To remove
Remove the child restraint in accordance with the instructions provided by the child restraint system’s manufacturer. ...

Starting
Tips for starting ► Do not operate the starter motor continuously longer than 10 seconds; doing so could run down the battery. If the engine does not start, turn the ignition switch back to ...