Unit Check (Quick Check): Display

This diagnosis does additional checks on the communication bus between the navigation unit and the navigation display unit. In addition, this test checks the internal electronic functions.

• If the connection is NG, first check for loose terminals at the navigation unit and the navigation display unit connections. Next check for an open or short in the ECU Bus line between the navigation unit and the navigation display unit. If the wire has an open or short, replace the affected shielded harness.
• If the ROM or RAM is NG, replace the navigation display unit (see NAVIGATION DISPLAY UNIT REMOVAL/INSTALLATION  ).
• The version represents the software version in the display.
  Fig 1: Screen Display - Communication Bus Check

  Courtesy of AMERICAN HONDA MOTOR CO., INC.