Ignition Signal Check For NAVI Control Unit

WARNING: This page is about a different car, the 2004 Nissan Quest. 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 P107 terminal 26 (G) and ground.
1. Battery voltage should exist.
OK or NG
1. OK: Replace NAVI control unit. Refer to REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT .
2. NG: Check harness for open or short between NAVI control unit and fuse.
  
  Fig 1: Disconnecting NAVI Control Unit Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.