Inspection Procedure 3: During the conversation with the hands free cellular phone system, the voice of other party cannot be heard: Function

During the conversation with the hands free cellular phone system, the voice signal of other party is transmitted from the cellular phone to the hands free module. Then, the signal is transmitted from the hands free module to the radio and CD player <vehicles without MMCS> or multivision display <vehicles with MMCS>, and then output from the speaker.