Ignition Signal Check for NAVI Control Unit

WARNING: This page is about a different car, the 2005 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IGNITION SIGNAL
1. Disconnect NAVI control unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector B41 terminal 26 (G) and ground.
  Battery voltage should exist.
  
  Fig 1: Checking Voltage Between Navi Control Unit Harness Connector B41 Terminal 26 (G) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace NAVI control unit. Refer to "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT ".
- NG: Check harness for open or short between NAVI control unit and fuse.