Navigation cannot control HVAC by voice command

NOTE:

Check the vehicle battery condition first (see BATTERY TEST ).
Check the connectors for poor connections or loose terminals.
Verify that the correct audio-navigation unit is installed for this model. Go into the Version .
Check any official Honda service website for more service information about the navigation system.

Connect the HDS to the DLC (see GENERAL TROUBLESHOOTING INFORMATION ).
Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0), and then back to ON (II).
Check for DTCs.
Are there any DTCs indicated?

YES -Troubleshoot and repair all CAN related DTCs, and recheck.

NO -Go to step 5.
Check the hard error code (see HOW TO CHECK ERROR HISTORY (NAVIGATION DTCS) ).
Are there any hard codes stored?

YES -Refer to the hard error code troubleshooting.

NO -Go to step 6.
Turn the ignition switch to LOCK (0).
Disconnect audio-navigation unit connector E (20P) and climate control unit connector A (36P).
Check for continuity between audio-navigation unit connector E (20P) terminals No. 6 and No. 15 and climate control unit connector A (36P) terminals No. 1 and No. 19 respectively.

Fig 1: Checking Continuity Between Audio-Navigation Unit Connector E (20P) Terminals No. 6 And 15 And Climate Control Unit Connector A (36P) Terminals No. 1 And 19
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 and a known-good climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION ). Reconnect all connectors, and recheck.
Does the symptom go away?

YES -Replace the original climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION ).

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