B1579 Voice recognition microphone disconnected. The radio and display unit loses the microphone connection detection signal
What does B1579 mean on a Toyota?
B1579. Voice recognition microphone disconnected. The radio and display unit loses the microphone connection detection signal. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.
Common causes of B1579
- Microphone connection detection line disconnected
- Failed telephone microphone assembly
- Loose or corroded microphone connector
- Damaged microphone harness
- Failed radio and display receiver assembly
How to fix B1579
- Confirm the code and test voice recognition
- Inspect and reseat the microphone connector
- Test the microphone detection line
- Check the microphone signal at the receiver
- Replace the failed part only after tests fail