Navigation cannot control HVAC by voice command

NOTE:

Check the vehicle battery condition first (see BATTERY TEST ).
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 for B-CAN DTCs and resolve them before troubleshooting.
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).
Pressing the TALK button, then give a voice command "Climate control" clearly in a natural speaking voice.
Does the HVAC system turn on by the voice command?

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

NO -Go to step 3.
Check the hard error code (see HOW TO CHECK ERROR HISTORY (NAVIGATION DTCS) ).
Are there any navigation DTCs indicated?

YES -Troubleshoot the indicated navigation DTC(s).

NO -Go to step 4.
Turn the ignition switch to LOCK (0).
Disconnect audio-navigation unit connector F (20P) and climate control unit connector A (28P).
Check for continuity between audio-navigation unit connector F (20P) terminals No. 5 and No. 16 and front climate control unit connector A (28P) terminals No. 26 and No. 28 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 -Go to step 9.

NO -Repair an open in the wire(s) between the audio-navigation unit and the climate control unit.
Substitute a known-good climate control unit (see SUNLIGHT SENSOR REPLACEMENT ). Reconnect all connectors, and recheck.
Does the symptom go away?

YES -Replace the original climate control unit (see SUNLIGHT SENSOR REPLACEMENT ).

NO -Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).