DTC 2707

DTC 2707  : Mic Diag

NOTE: 

• Check the vehicle 12 volt 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 .
• Check the connectors for poor connections loose terminal.

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-ANC 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-ANC microphone 8P connector: disconnected
   Test point 1	Front HFL-ANC microphone 8P connector No. 4
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   The MIC PWR wire is OK. Go to step 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
   	Front HFL-ANC microphone 8P connector: disconnected
   Test point 1	Telematics control unit connector A (32P) No. 10
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   Repair an open in the wire.

   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.

   Telematics control unit connector A (32P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Front HFL-ANC microphone 8P connector: disconnected
   	Telematics control unit connector A (32P): disconnected
   Test point 1	Telematics control unit connector A (32P) No. 10
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to body ground in the wire.

   NO 

   Replace the telematics control unit .

5. Determine possible failure area (Front HFL-ANC microphone, others)

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

   Test condition	Vehicle ON mode
   	Front HFL-ANC microphone 8P connector: disconnected

   Test point 1	Front HFL-ANC microphone 8P connector No. 2
   Test point 2	Front HFL-ANC microphone 8P connector No. 1

   Is there about 8.0 V?

   YES 

   Replace the front HFL-ANC microphone .

   NO 

   Go to step 6.

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

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

   Test condition	Vehicle ON mode
   	Front HFL-ANC microphone 8P connector: disconnected
   Test point 1	Front HFL-ANC microphone 8P connector No. 2
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   The ECALL-NAVI MIC+ wire is OK. Go to step 9.

   NO 

   Go to step 7.

7. Open wire check (ECALL-NAVI MIC+ line)

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

   Test condition	Vehicle ON mode
   	Front HFL-ANC microphone 8P connector: disconnected
   Test point 1	Telematics control unit connector A (32P) No. 9
   Test point 2	Body ground

   Is there about 8.0 V?

   YES 

   There is an open in the wire. Replace the affected shielded harness.

   NO 

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

8. Shorted wire check (ECALL-NAVI MIC+ line)

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

   -2. Disconnect the following connector.

   Telematics control unit connector A (32P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Front HFL-ANC microphone 8P connector: disconnected
   	Telematics control unit connector A (32P): disconnected
   Test point 1	Telematics control unit connector A (32P) No. 9
   Test point 2	Body ground

   Is there continuity?

   YES 

   There is a short to body ground in the wire. Replace the affected shielded harness.

   NO 

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

9. Open wire check (ECALL-NAVI MIC- line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Front HFL-ANC microphone 8P connector: disconnected
   	Telematics control unit connector A (32P): disconnected

   Test point 1	Front HFL-ANC microphone 8P connector No. 1
   Test point 2	Telematics control unit connector A (32P) No. 8

   Is there continuity?

   YES 

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

   NO 

   There is an open in the wire. Replace the affected shielded harness.

10. Shorted wire check (ECALL-NAVI MIC+ line to ECALL-NAVI MIC- line, SH ECALL-NAVI MIC line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Front HFL-ANC microphone 8P connector: disconnected
    	Telematics control unit connector A (32P): disconnected
    Test point 1	Telematics control unit connector A (32P) No. 9
    Test point 2	Telematics control unit connector A (32P) No. 8

    Test point 1	Telematics control unit connector A (32P) No. 9
    Test point 2	Telematics control unit connector A (32P) No. 7

    Is there continuity?

    YES 

    There is a short in the wires. Replace the affected shielded harness.

    NO 

    Replace the telematics control unit .