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 - Refer to: How to Troubleshoot the Navigation System, or How to Troubleshoot the Navigation System (Display Audio) (2016-17) .
• 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

   -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

   -1. Select the HFL in the Unit Check menu, and check for HFL DTCs.

   Is DTC B1792 indicated?

   YES 

   Go to DTC B1792 troubleshooting .

   NO 

   Go to step 3.

3. 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)

   -1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connectors.

   HandsFreeLink control unit connector A (32P)

   Audio-navigation unit connector F (18P) - Refer to: Audio-Navigation Unit Removal and Installation, or Audio-Navigation Unit Removal and Installation (Display Audio) (2016-17)

   - 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)

   Courtesy of HONDA, U.S.A., INC.

   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)

   -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)

   -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 

   Replace the audio-navigation unit - Refer to: Audio-Navigation Unit Removal and Installation, or Audio-Navigation Unit Removal and Installation (Display Audio) (2016-17) .

   NO 

   Replace the original HandsFreeLink control unit.