Hazard Only Mode
WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
When the LOCK button is pushed, the hazard warning lamp flashes twice.
When the UNLOCK button is pushed, neither the hazard warning lamp nor the horn operates.
Courtesy of NISSAN MOTOR CO., U.S.A.