Inspection Procedure 4: Even when the steering wheel voice control switch is operated, the conversation is not possible: Function

When the steering wheel voice control switch is operated, the switch signal is transmitted to the radio and CD player <vehicles without MMCS> or audio visual navigation unit <vehicles with MMCS>. Then, via the CAN communication, the signal is transmitted from the radio and CD player <vehicles without MMCS> or audio visual navigation unit <vehicles with MMCS> to the hands free module.