| Possible cause |
- Malfunction in the microphone related parts
- Open or short circuit in the wiring harness between the microphone and the Bluetooth unit
- Microphone malfunction
- Poor connection of the connector
- Malfunction in the Hang-up/Pick-up/Talk button
- Hang-up/Pick-up/Talk button malfunction
- Open or short circuit in the wiring harness between the Hang-up/Pick-up/Talk button and the audio unit
- Poor connection of the connector
- Bluetooth unit does not receive the vehicle speed signal
- Malfunction in the audio system
- Steering switch (+) and/or related circuit malfunction
- Influence due to vehicle driving conditions
- Noise while driving is loud (engine, tire noise, blower fan noise)
- Windows and/or sunroof are open
- Bluetooth unit malfunction
- Problem in the cellular phone
- Vehicle is in a place where signal transmission is weak
- Bluetooth does not operate
- A cellular phone other than a Hands-free telephone system-enabled models is used.
|