Display day/night mode does not work or does not work properly

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Turn the headlight on, and check that the dash brightness setting is not set to high.
Check for B-CAN DTCs and resolve them before troubleshooting.
Verify that the correct audio-navigation unit is installed for this model. Go into the System Diagnostic Mode (see SYSTEM DIAGNOSTIC MODE ), and use Version (see VERSION ).
Check the connectors for poor connections or loose terminals.
Check any official Honda service website for more service information about the navigation system.

Turn the ignition switch to ON (II).
Press the Day/Night button to see if the display changes to day and night modes.
Does the display change to day and night modes when pressing the Day/Night button?

YES -Go to step 3.

NO -Go to INTERFACE DIAL BUTTONS DO NOT WORK PROPERLY TROUBLESHOOTING .
Turn the headlights on, and adjust the dash brightness up and down, then to the middle range.
Does the display change to day and night modes when turning the headlights on and off?

YES -The system is OK at this time.

NO -Go to step 4.
Turn the combination lighting switch to off.
Clear the hard error code (see HOW TO CLEAR ERROR HISTORY ).
Turn the ignition switch to LOCK (0).
Disconnect audio-navigation unit connector C (28P).
Turn the ignition switch to ON (II).
Turn the combination lighting switch to the parking light position.
With the combination lighting switch in the parking light position, measure the voltage between audio-navigation unit connector C (28P) terminal No. 11 and body ground.

Fig 1: Measuring Voltage Between Body Ground And Audio-Navigation Unit Connector C (28P) Terminal No. 11
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Substitute a known-good audio-navigation unit (including the HDD) (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ), then reconnect all of the connectors, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ). If the symptom/indication is still present, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).

NO -Repair an open or short in the wire between the audio-navigation unit and the gauge control module.