Security indicator does not work properly (with navigation)

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 ).
Check the connectors for poor connections or loose terminals.
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.

Turn the ignition switch to LOCK (0).
Is the security indicator (LED) on (blink)?

YES -Go to Step 2.

NO -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 ).
Turn the ignition switch to ON (II).
Turn on the audio system.
Is the security indicator (LED) off?

YES -The audio-navigation unit is OK at this time. Check for loose or poor connections at the audio-navigation unit and the audio-navigation switch panel.

NO -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 ).