Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC 2707: MIC Diag
- Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
- This navigation DTC sets when a problem is detected in the microphone circuit.
- 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 ).
- Select 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 the HandsFreeLink control unit 28P connector, the HFL-navigation microphone 3P connector, and audio-navigation unit B (24P) 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 -Replace the HFL-navigation microphone (see HFL-NAVIGATION MICROPHONE REMOVAL/INSTALLATION ).
- Select the Mic in the System Links.
- Press the navigation TALK button on the steering wheel switch, then check the Mic Level (see DEMO MODE
).
Does the microphone level reach at least the 6th bar?
YES -Intermittent failure, the system is OK at this time.
NO -Replace the HFL-navigation microphone (see HFL-NAVIGATION MICROPHONE REMOVAL/INSTALLATION ).
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.