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DTC 2707: MIC Diag

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NOTE:
  • Check the vehicle battery condition first (see BATTERY TEST ).
  • This navigation DTC sets when a problem is detected in the microphone circuit.
  • Check any official Honda service website for more service information about the navigation system.
  • Before you troubleshoot, make sure to follow the General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION  ).
  1. Clear the hard error code (see HOW TO CLEAR ERROR HISTORY  ).
  2. Turn the ignition switch to LOCK (0) and then back to ON (II).
  3. Go into the System Diagnostic Mode, and select the Self-Diagnosis Mode (see SYSTEM DIAGNOSTIC MODE  ).
  4. Check the System Links (see SYSTEM LINKS  ).

    Is the Mic icon red? 

    YES  -Go to step 5.

    NO  -Go to step  11.

  5. Clear the hard error code (see HOW TO CLEAR ERROR HISTORY  ).
  6. Turn the ignition switch to LOCK (0) and then back to ON (II).
  7. Check for the hard error code (see HOW TO CHECK ERROR HISTORY (NAVIGATION DTCS)  ).

    Is DTC 2705 indicated? 

    YES  -Do the DTC 2705 troubleshooting (see DTC 2705: HFL DIAG  ).

    NO  -Go to step 8.

  8. Go into the System Diagnostic Mode (see SYSTEM DIAGNOSTIC MODE  ), and use the Mic/STRG SW in the Functional Setup (see FUNCTIONAL SETUP  ).

    Is DTC B1775 or B1776 indicated? 

    YES  -Troubleshoot the indicated DTC(s).

    NO  -Go to step 9.

  9. Turn the ignition switch to LOCK (0).
  10. Check for poor connections or loose terminals at these items:
    • HandsFreeLink control unit 32P connector
    • Front HFL-navigation-ANC microphone 7P connector
    • Audio-navigation unit connector C (28P)

      Are the connections OK? 

      YES  -Go to step  13.

      NO  -Repair poor connections or loose terminals, and recheck.

  11. Go into the System Diagnostic Mode (see SYSTEM DIAGNOSTIC MODE  ), and use the Mic/STRG SW in the Functional Setup (see FUNCTIONAL SETUP  ).
  12. Check the Mic level by pressing the TALK button on the steering wheel, then say "Testing" in front of the microphone.

    Is the microphone level OK? 

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

    NO  -Replace the front HFL-navigation-ANC microphone (see FRONT HFL-NAVIGATION-ANC MICROPHONE REMOVAL/INSTALLATION  ).

  13. Turn the ignition switch to ON (II).
  14. Measure the voltage between body ground and front HFL-navigation-ANC microphone 7P connector terminals No. 1 and No. 2 individually.
    Fig 1: Measuring Voltage Between Body Ground And Front HFL-Navigation-ANC Microphone 7P Connector Terminals No. 1 And No. 2
    G06971185Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 15.

    NO  -If the +B wire does not have voltage, repair an open in the wire between the No. B16 (10 A) fuse in the under-hood fuse/relay box and the front HFL-navigation-ANC microphone. If the ACC wire does not have voltage, repair an open in the wire between the No. C13 (7.5 A) fuse in the driver's under-dash fuse/relay box and the front HFL-navigation-ANC microphone.

  15. Measure the voltage between front HFL-navigation-ANC microphone 7P connector terminal No. 7 and body ground.
    Fig 2: Measuring Voltage Between Front HFL-Navigation-ANC Microphone 7P Connector Terminals No. 7 And Body Ground
    G06971186Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there less than 0.2 V? 

    YES  -Go to step 16.

    NO  -Repair open or high resistance in the wire between the front HFL-navigation-ANC microphone and body ground (G701) (see ROOF WIRE HARNESS (WITH MOONROOF) (J) ).

  16. Turn the ignition switch to LOCK (0).
  17. Disconnect the HandsFreeLink control unit 32P connector.
  18. Disconnect audio-navigation unit connector C (28P).
  19. Check for continuity between HandsFreeLink control unit 32P connector terminals No. 17 and No. 18 and audio-navigation unit connector C (28P) terminals No. 16 and No. 15 respectively.
    Fig 3: Checking For Continuity Between Handsfreelink Control Unit 32P Connector Terminals No. 17 And No. 18 And Audio-Navigation Unit Connector C (28P) Terminals No. 16 And No. 15
    G00525947Courtesy of AMERICAN HONDA MOTOR CO., INC.

    YES  -Substitute a known-good front HandsFreeLink control unit (see HANDSFREELINK CONTROL UNIT REMOVAL/INSTALLATION ), and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit (see HANDSFREELINK CONTROL UNIT REMOVAL/INSTALLATION ). If the symptom/indication is still present, Replace the audio-navigation unit (see Audio-Navigation Unit Removal/Installation ).

    NO  -There is an open in the wire(s) between the HandsFreeLink control unit and the audio-navigation unit. Replace the affected shielded harness.

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