Factory diagnostic screen "In Line Diag"

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If the vehicle left the factory in the factory diagnostic mode, you will see this screen every time you turn on the ignition.

When a navigation control 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) shows up. Normally the factory done the steps necessary to verify proper operation and terminate the factory diagnostic. Until the proper confirmation sequence is done, the screen will show up every time the vehicle is started.

Fig 1: Diagnosis Screen Display - 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 + Cancel) for about 5 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).
Select Complete, then Return, and then turn 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.