Monitor Check: Disp

When the connection is NG. 

First check for loose terminals at the navigation unit and the display unit connectors.

Next check for an open or short in the communication line between the navigation unit and the display unit. If the line is OK, replace the display unit. If the line is found to have an open or short, replace the affected shielded harness.

When the ROM or RAM is NG. 

Replace the display unit.

Fig 1: Identifying Disp Screen Display

Courtesy of AMERICAN HONDA MOTOR CO., INC.