Ignition Signal Check

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

IGNITION SIGNAL CHECK
1. Disconnect the NAVI control unit connector.
2. Turn the ignition switch ON.
3. Check voltage between NAVI control unit and ground.
  
  Fig 1: Checking IGNITION SIGNAL Voltage Between NAVI Control Unit And Ground (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking IGNITION SIGNAL Voltage Between NAVI Control Unit And Ground (2 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : Replace NAVI control unit.

NG : Check harness for open or short between NAVI control unit and fuse.