Inspection Procedure 4: Even when the steering 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 changer < 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 changer < vehicles without MMCS > or audio visual navigation unit < vehicles with MMCS > to the hands-free module.