Ignition Signal Check

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

IGNITION SIGNAL CHECK
1. Turn the ignition switch ON.
2. Check voltage between NAVI control unit and ground.
  
  Fig 1: Voltage Check Table Between NAVI Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace NAVI control unit.
2. NG: Check harness for open or short between NAVI control unit and fuse.
  
  Fig 2: Checking Voltage Between NAVI Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.