DTC 2707: MIC Diag

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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 ).

Clear the hard error code (see HOW TO CLEAR ERROR HISTORY ).
Turn the ignition switch to LOCK (0), and then back to ON (II).
Go into the Diagnostic Menu, and select the Self-Diagnosis Mode in the Select Diagnosis items menu (see SYSTEM DIAGNOSTIC MODE ).
Check the System Links.
Is the Mic icon red?

YES -Go to step 5.

NO -Go to step 10.
Turn the ignition switch to LOCK (0).
Check for poor connections or loose terminals at these items:
- HandsFreeLink control unit 28P connector
- HFL-navigation microphone 7P connector
  Are the connections OK?
  
  YES -Go to step 7.
  
  NO -Repair poor connections or loose terminals.
Connect the HDS to the DLC (see GENERAL TROUBLESHOOTING INFORMATION ).
Turn the ignition switch to ON (II).
Check for DTCs with the HDS.
Is DTC B1775 or B1776 indicated?

YES -Troubleshoot the indicated DTC.

NO -Go to step 12.
Select the Mic in the System Links.
Press the TALK button on the steering wheel switch, then check the Mic Level (see FUNCTIONAL SETUP ).
Is the microphone level OK?

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

NO -Replace the HFL-navigation microphone (see HFL-NAVIGATION MICROPHONE REMOVAL/INSTALLATION ).
Measure the voltage between body ground and HFL-navigation microphone 7P connector terminals No. 6 and No. 7 individually.

Fig 1: Measuring Voltage Between Body Ground And 7P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 13.

NO -Repair an open in the wire(s) between the No. 7 (10 A) fuse in the under-dash fuse/relay box, the No. 32 (10 A) fuse in the under-dash fuse/relay box and the HFL-navigation microphone.
Measure the voltage between HFL-navigation microphone 7P connector terminal No. 1 and body ground.

Fig 2: Measuring Voltage Between 7P Connector Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2 V?

YES -Replace the HFL-navigation microphone (see HFL-NAVIGATION MICROPHONE REMOVAL/INSTALLATION ).

NO -Repair an open or high resistance in the wire between HFL-navigation microphone 7P connector terminal No. 1 and body ground (G601) (see CONNECTOR TO FUSE/RELAY BOX INDEX ).