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

See also:

Ignition switch
[For vehicles equipped with keyless operation system] For information on operations for vehicles equipped with the keyless operation system, refer to “Keyless operation system: Engine switch”. ...

Ignition switch
To prevent vehicle theft, only the emergency key with the preregistered keyless operation key inserted can start the engine. (Electronic immobilizer function) Also refer to “Starting and driving ...

Electronic immobilizer (Anti-theft starting system)
The electronic immobilizer has been designed to significantly reduce the possibility of vehicle theft. The purpose of the system is to immobilize the vehicle if an invalid start is attempted. A v ...