Manufacturer Code Charts: 2707

Navigation System DTC Troubleshooting: 2707

DTC 2707:

MIC Diag

NOTE:

- Check the vehicle battery condition first 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 How to Troubleshoot the Navigation System.

1. Clear the hard error code.

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 in the Select Diagnosis Items menu Navigation System Diagnostic Mode.

4. Check the System Links.

Is the Mic icon red?

YES -

Go to step 5.

NO -

Go to step 11.

5. Turn the ignition switch to LOCK (0).

6. Check for poor connections or loose terminals at these items:

- HandsFreeLink control unit 28P connector
- Front HFL-navigation-ANC/active sound control microphone 7P connector
- Navigation unit connector D (5P)

Are there connections or terminals OK?

YES -

Go to step 7.

NO -

Repair poor connections or loose terminals, and recheck.

7. Connect the HDS to the DLC Initial Inspection and Diagnostic Overview.

8. Clear the DTCs with the HDS.

9. Turn the ignition switch to LOCK (0) and then back to ON (II).

10. Check for HFL DTCs with the HDS.

Is DTC B1775 or B1776 indicated?

YES -

Troubleshoot the indicated DTC(s).

NO -

Go to step 13.

11. Select the Mic in the System Links.

12. Check the Mic level by pressing the navigation 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/active sound control microphone Front HFL-Navigation-ANC/Active Sound Control Microphone Removal / Installation.

13. Measure the voltage between body ground and front HFL-navigation-ANC/active sound control microphone 7P connector terminals No. 1 and No. 2 individually.





Is there battery voltage?

YES -

Go to step 14.

NO -

If the+B wire does not have voltage, repair an open in the wire between the No. A15 (10 A) fuse in the under-hood fuse/relay box and the front HFL-navigation-ANC/active sound control microphone. If the ACC wire does not have voltage, repair an open in the wire between the No. B18 (7.5 A) fuse in the driver's under-dash fuse/relay box and the front HFL-navigation-ANC/active sound control microphone.

14. Measure the voltage between the front HFL-navigation-ANC/active sound control microphone 7P connector terminal No. 7 and body ground.





Is there less than 0.2 V?

YES -

Go to step 15.

NO -

Repair an open or high resistance in the wire between the front HFL-navigation-ANC/active sound control microphone and body ground (G401).

15. Turn the ignition switch to LOCK (0).

16. Disconnect the HandsFreeLink control unit 28P connector.

17. Disconnect navigation unit connector C (16P).

18. Check for continuity between HandsFreeLink control unit 28P connector terminals No. 15 and No. 16 and navigation unit connector C (16P) terminals No. 9 and No. 1 respectively.





Is there continuity?

YES -

Substitute a known-good HandsFreeLink control unit Service and Repair, then recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit Service and Repair. If the symptom/indication is still present, replace the navigation unit Service and Repair.

NO -

There is an open in the wire(s) between the HandsFreeLink control unit and the navigation unit. Replace the affected shielded harness.