Diagnostic Test: Monitor Check

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first (see BATTERY TEST ).
Always compare the screen image to a known-good vehicle. If the screen looks the same, inform the client that it is a characteristic of the system.
Check the connectors for poor connections or loose terminals.
Make sure that the latest navigation software is installed.
Check any official Honda service website for more service information about the navigation system.
Check the navigation screen settings for brightness, contrast, and black level, and check the color screen for map color and menu color.
Before troubleshooting, make sure you have anti-theft codes for the audio-navigation unit.
After troubleshooting, enter the anti-theft codes for the audio-navigation unit.

Check for electronic aftermarket accessories (possibly hidden) mounted near the navigation display unit or the audio-navigation unit.
Are there any electronic accessories?

YES -Disable the accessories, and recheck.

NO -Go to step 2.
Start up the navigation system (screen).
Is the picture scrolling horizontally (left to right or right to left)?

YES -Go to step 3.

NO -Intermittent failure.
Turn the ignition switch to LOCK (0).
Disconnect audio-navigation unit connector G (8P) and the navigation display unit 28P connector.
Check for continuity between audio-navigation unit connector G (8P) terminal No. 2 and body ground.

Fig 1: Checking Continuity Between Connector G (8P) Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -There is a short to body ground in the wires between the audio-navigation unit and the navigation display unit. Replace the affected shielded harness.

NO -Go to step 6.

Check for continuity between the terminals of audio-navigation unit connector G (8P) according to the table.

From terminal	To terminals
G2 (GRN)	G7 (YEL), G3 (RED), G8 (WHT), G6 (BRN)

Fig 2: Identifying Audio-Navigation Unit Connector G (8P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity between any of the terminals?

YES -There is a short in the wires between the audio-navigation unit and the navigation display unit. Replace the affected shielded harness.

NO -Go to step 7.

Check for continuity between audio-navigation unit connector G (8P) terminal No. 2 and navigation display unit 28P connector terminal No. 23.

Fig 3: Checking Continuity Between Connector G (8P) And 28P Connector Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 8.

NO -There is an open in the wire between the audio-navigation unit and the navigation display unit. Replace the affected shielded harness.
Substitute a known-good navigation display unit (see NAVIGATION DISPLAY UNIT REMOVAL/INSTALLATION ), and recheck.
Is the picture OK?

YES -Check for loose connections, then replace the original navigation display unit.

NO -Check for loose connections, and recheck. If a poor connection or loose terminal is found, replace the shielded harness. If no poor or loose terminals are found, substitute a known-good audio-navigation unit (including the HDD) (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).