Audio-Navigation System DTC Troubleshooting: 2705
DTC 2705: HFL Diag
NOTE:
Check the vehicle battery condition first.
This navigation DTC sets when NG is indicated in the HFL diagnosis (the HFL icon is red in the System Link).
Before you troubleshoot, make sure to follow the General Troubleshooting Information.
Check any official Honda service website for more service information about the navigation system.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Clear the hard error codes.

?2.
Press the engine start/stop button to select the OFF mode and then select the ON mode.

?3.
Check for hard error codes.

Is DTC 2705 indicated?

     
YES
     
     
     
The failure is duplicated, go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
2.
HandsFreeLink system DTC check:

HandsFreeLink system DTC check
?1.
Select the HFL in the Unit Check menu, and check for HFL DTCs.

Is DTC B1792 indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
HFL diagnosis check:

HFL diagnosis check
?1.
Select the HFL in the Unit Check menu, and check GA-NET status.

Is GA-NET OK indicated?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
4.
HandsFreeLink system DTC check:

HandsFreeLink system DTC check
?1.
Select the HFL in the Unit Check menu, and check for HFL DTCs.

Are there any HFL DTCs indicated?

     
YES
     
     
     
Go to indicated HFL DTC troubleshooting.?
     
NO
     
     
     
Replace the audio-navigation unit.?