Check For Distance Switch

WARNING: This page is about a different car, the 2006 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine.
Press the ON/OFF switch for less than 1.5 seconds.
Press the DISTANCE switch.
Check if the set distance indicator changes display in order of: (long)-->(middle)-->(short).
NOTE: The set distance indicator shows long immediately after the engine starts.

Fig 1: Set Distance Indicator Changes Details Chart
Courtesy of NISSAN MOTOR CO., U.S.A.