Inspection Procedure 2: During The Conversation With The Hands Free Cellular Phone System, The Speaker's Voice Cannot Be Heard By The Other Party: Function
WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
During the conversation with the hands free cellular phone system, the signal of speaker's voice is transmitted from the microphone unit to the hands free module. Then the signal is transmitted from the hands free module to the cellular phone.