Precautions for NAVI Control Unit Replacement

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.

When replacing the NAVI control unit, eject the map DVD-ROM before disconnecting the battery.
The NAVI control unit has the following information stored in its memory. Record the memory contents before replacing the control unit, and input them in the new unit as necessary.
1. < Image quality >
  - Brightness of light when ON/OFF
  - Dimming switching
  - Display color switching
2. < Navigation mode >
  - Latest status (map screen/bird view(tm), reduced scale, rotation angle of map screen, route guide ON/OFF, track ON/OFF, etc.)
  - Current position
  - Destination, passing point 1-5
  - Registered places, their names, etc.

NOTE: Only removing the battery does not erase the memory.