Unit Check (Quick Check): Display
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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, the ECU Bus line may be failure. Check for hard error codes (see How to Check Error History (Navigation DTCs) )
- 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.