Audio unit does not exit anti-theft mode (with navigation)

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:

Check the vehicle battery condition first (see BATTERY TEST ).
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Turn the ignition switch to ON (II).
Press and hold the VOLUME/POWER knob more than 2 seconds to release the anti-theft mode.
Is the anti-theft mode released?

YES -Intermittent failure, the system is OK at this time.

NO -Go to step 3.
Turn the ignition switch to LOCK (0).
Disconnect audio-navigation unit connector F (20P) and the gauge control module 32P connector.
Check for continuity between audio-navigation unit connector F (20P) terminals No. 5 and No. 16 and the gauge control module 32P connector terminals No. 29 and No. 30 respectively.

Fig 1: Checking For Continuity Between Audio-Navigation Unit Connector F (20P) Terminals No. 5 And No. 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -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 ).

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