Phone Conversation Is Not Possible. (The Microphone Does Not Respond To A Voice. No Sound Is Heard From The Speaker.)

CHECK DTCS.
Read DTCs of the Telematics. Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .

Is DTC B2A04, B2A05 or B2A06 displayed?
- Yes: Perform the diagnosis for the displayed DTC B2A04, B2A05 or B2A06. Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2A04 MIC CIRCUIT . Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2A05 LEFT SPEAKER/AUDIO CIRCUIT . Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2A06 RIGHT SPEAKER/AUDIO CIRCUIT .
- No: Go to 2.
CHECK THE SPEAKER OPERATION.
Perform [Speaker ON] of the active test for the Telematics. Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Active Test .

Does it sound?
- Yes: Go to 3.
- No: Go to 4.
CHECK MICROPHONE.
Perform the microphone voice input.

Is the voice recognized?
- Yes: GO to 4.
- No: Replace the microphone.
CHECK THE SPEAKER.
Check the speaker.

Is the check result OK?
- Yes: Go to 5.
- No: Replace the speaker.
CHECK THE TELEPHONE CALL.
1. Place the mobile phone in the vehicle.
2. Establish a Bluetooth connection between the mobile phone in the vehicle and the vehicle unit.
3. Make a call from outside to the mobile phone in the vehicle.
4. Check that a telephone call is available through the in-vehicle microphone with the hands-free function.
Is a telephone call successful?
- Yes: The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis.
  NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
- No: Perform the diagnosis according to inspection for DTC B2A04 MIC CIRCUIT. Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2A04 MIC CIRCUIT .