Factory diagnostic screen In Line Diag

NOTE: If the vehicle left the factory in the factory diagnostic mode, or if the navigation unit is replaced you will see this screen every time you turn on the ignition.

When a navigation unit is powered up for the first time at the factory or after replacement with a new or remanufactured navigation unit, the factory diagnosis screen (In Line Diag) appears. Normally the factory does the steps necessary to verify proper operation and terminate the factory diagnostic. Until the proper confirmation sequence is done, the screen appears every time the vehicle is started.

Fig 1: Factory Diagnostic Screen In Line Diag

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Follow the steps below to prevent the screen from showing up in the future:

Press and hold the buttons (MENU, MAP/GUIDE, and CANCEL) for about 3 seconds. The Select Diagnosis items screen appears.
Press and hold the MAP/GUIDE button for 5-10 seconds. A screen with a Complete button, appears.
Press complete, then Return, and then shut the key off for 5 seconds. Do not disconnect the battery during this period as the unit is saving the setting to the SRAM memory. The In Line Diag should not appear again.
Restart the vehicle, and confirm normal operation by completing the TQI of the Navigation System Service Bulletin.