None Of The Operations Work.

CHECK HARNESS
1. Check continuity between spiral cable harness connector (A) M303 terminal 17 and audio unit harness connector (B) M76 terminal 15.
  17 - 15: Continuity should exist.
  
  Fig 1: Identifying Signal Between AV (NAVI) Control Unit Harness Connector M78 Terminals 8 And 7
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Replace steering switch.

NG: Check spiral cable. If the malfunction is detected, repair the harness and connector.