Audio-Navigation System DTC Troubleshooting: 2707
DTC 2707: Mic Diag
NOTE:
Check the vehicle battery condition first.
This navigation DTC sets when a problem is detected in the microphone circuit (the Mic 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 2707 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.
HandsFreeLink system DTC check:

HandsFreeLink system DTC check
?1.
Go into the System Diagnostic Mode, and select the MIC/STRG SW in the System Links to check the STRG SW.

Are there any HFL DTCs indicated?

     
YES
     
     
     
Go to indicated HFL DTC troubleshooting.?
     
NO
     
     
     
Go to step 4.
4.
Open wire check (HFT-NAVI MIC+ line, HFT-NAVI MIC? line):

Open wire check (HFT-NAVI MIC+ line, HFT-NAVI MIC? line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
HandsFreeLink control unit connector A (32P): disconnected
 
Audio-navigation unit connector F (18P): disconnected
Test circuit
HFT-NAVI MIC+
Test point 1
HandsFreeLink control unit connector A (32P) No. 18 (GRN)
Test point 2
Audio-navigation unit connector F (18P) No. 13 (GRN)

Test circuit
HFT-NAVI MIC?
Test point 1
HandsFreeLink control unit connector A (32P) No. 17 (RED)
Test point 2
Audio-navigation unit connector F (18P) No. 14 (RED)


Is there continuity?

     
YES
     
     
     
The HFT-NAVI MIC+ and the HFT-NAVI MIC? wires are OK. Go to step 5.
     
NO
     
     
     
There is an open in the wire(s) between the HandsFreeLink control unit and the audio-navigation unit. Replace the affected shielded harness.?
5.
Determine possible failure area (front HFL-navigation-ANC/active sound control microphone, others):

Determine possible failure area (front HFL-navigation-ANC/active sound control microphone, others)
?1.
Substitute a known-good front HFL-navigation-ANC/active sound control microphone.

?2.
Reconnect all the connectors.

?3.
Clear the hard error codes.

?4.
Press the engine start/stop button to select the OFF mode and then select the ON mode.

?5.
Check for hard error codes.

Is DTC 2707 indicated?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
Replace the original front HFL-navigation-ANC/active sound control microphone.?
6.
HandsFreeLink control unit check (substitution):

HandsFreeLink control unit check (substitution)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Substitute a known-good HandsFreeLink control unit.

?3.
Clear the hard error codes.

?4.
Press the engine start/stop button to select the OFF mode and then select the ON mode.

?5.
Check for hard error codes.

Is DTC 2707 indicated?

     
YES
     
     
     
     
NO
     
     
     
Replace the original HandsFreeLink control unit.?