DTC 2706: Mic Diagnostic (Display Audio) (2016-17)

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 the connectors for poor connections or loose terminals.

1. Problem verification

   -1. Clear the hard error codes.

   - 2. Turn the vehicle to the OFF (LOCK) mode then 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. Determine possible failure area (MIC PWR line, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Front HFL-navigation-ANC/active sound control microphone 8P connector

   - 3. Turn the vehicle to the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
   Test point 1	Front HFL-navigation-ANC/active sound control microphone 8P connector No. 4 - Refer to: HFL-Navigation Microphone Connector for Inputs and Outputs, or HFL-Navigation Microphone Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   The MIC PWR wire is OK. Go to step 5. Refer to:  5

   NO 

   Go to step 3.

3. Open wire check (MIC PWR line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	HFT microphone 8P connector: disconnected
   Test point 1	Audio-navigation unit connector J (28P) No. 25 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   Repair an open in the wire between the front HFL-navigation-ANC/active sound control microphone and the audio-navigation unit.

   NO 

   The MIC PWR wire is not open. Go to step 4.

4. Shorted wire check (MIC PWR line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Audio-navigation unit connector J (28P)

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
   	Audio unit connector J (28P): disconnected
   Test point 1	Audio-navigation unit connector J (28P) No. 25 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to body ground in the wire between the front HFL-navigation-ANC/active sound control microphone and the audio-navigation unit.

   NO 

   Replace the audio-navigation unit - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17) .

5. Determine possible failure area (Front HFL-navigation-ANC/active sound control microphone, others)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected

   Test point 1	Front HFL-navigation-ANC/active sound control microphone 8P connector No. 2 - Refer to: HFL-Navigation Microphone Connector for Inputs and Outputs, or HFL-Navigation Microphone Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Front HFL-navigation-ANC/active sound control microphone 8P connector No. 1 - Refer to: HFL-Navigation Microphone Connector for Inputs and Outputs, or HFL-Navigation Microphone Connector for Inputs and Outputs (Display Audio) (2016-17)

   Is there about 8.0 V?

   YES 

   Replace the Front HFL-navigation-ANC/active sound control microphone .

   NO 

   Go to step 6.

6. Determine possible failure area (MIC+ line, others)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
   Test point 1	Front HFL-navigation-ANC/active sound control microphone 8P connector No. 2 - Refer to: HFL-Navigation Microphone Connector for Inputs and Outputs, or HFL-Navigation Microphone Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   The MIC+ wire is OK. Go to step 9. Refer to:  9

   NO 

   Go to step 7.

7. Open wire check (MIC+ line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
   Test point 1	Audio-navigation unit connector J (28P) No. 11 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   There is an open in the wire (s) between the front FFL-navigation-ANC/active sound control microphone and the audio unit. Replace the affected shielded harness.

   NO 

   The MIC+ wire is not open. Go to step 8.

8. Shorted wire check (MIC+ line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Audio-navigation unit connector J (28P)

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
   	Audio-navigation unit connector J (28P): disconnected
   Test point 1	Audio-navigation unit connector J (28P) No. 11 - Refer to: Audio Unit Connector for Inputs and Outputs (Without Touch Screen) (2013), or Audio Unit Connector for Inputs and Outputs (With Touch Screen) (2013), or Audio Unit Connector for Inputs and Outputs (Without Touch Screen) (2014), or Audio Unit Connector for Inputs and Outputs (With Touch Screen) (2014), or Audio Unit Connector for Inputs and Outputs (With Touch Screen) (2015), or Audio Unit Connector for Inputs and Outputs (Without Touch Screen) (2015), or Audio Unit Connector for Inputs and Outputs (Display Audio) (2016-17), or Audio Unit Connector for Inputs and Outputs (Normal Audio) (2016-17)
   Test point 2	Body ground

   Is there continuity?

   YES 

   There is a short to body ground in the wire between the front HFL-navigation-ANC/active sound control microphone and the audio-navigation unit. Replace the affected shielded harness.

   NO 

   The MIC+ wire is not shorted to ground. Go to step 9.

9. Open wire check (MIC- line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
   	Audio-navigation unit connector J (28P): disconnected

   Test point 1	Front HFL-navigation-ANC/active sound control microphone 8P connector No. 1 - Refer to: HFL-Navigation Microphone Connector for Inputs and Outputs, or HFL-Navigation Microphone Connector for Inputs and Outputs (Display Audio) (2016-17)
   Test point 2	Audio-navigation unit connector J (28P) No. 10 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)

   Is there continuity?

   YES 

   The MIC- wire is not open. Go to step 10.

   NO 

   There is an open in the wire (s) between the front HFL-navigation-ANC/active sound control microphone and the audio-navigation unit. Replace the affected shielded harness.

10. Shorted wire check (MIC+ line to MIC- line, SH_MIC line)

    -1. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	Front HFL-navigation-ANC/active sound control microphone 8P connector: disconnected
    	Audio-navigation unit connector J (28P): disconnected
    Test point 1	Audio-navigation unit connector J (28P) No. 11 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)
    Test point 2	Audio-navigation unit connector J (28P) No. 10 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)

    Test point 1	Audio-navigation unit connector J (28P) No. 11 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)
    Test point 2	Audio-navigation unit connector J (28P) No. 12 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (2013), or Audio-Navigation Unit Connector for Inputs and Outputs (2014), or Audio-Navigation Unit Connector for Inputs and Outputs (2015 2016), or Audio-Navigation Unit Connector for Inputs and Outputs (Display Audio) (2016-17)

    Is there continuity?

    YES 

    There is a short in the wires between the front HFL-navigation-ANC/active sound control microphone and the audio unit. Replace the affected shielded harness.

    NO 

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