| Possible cause |
- Malfunction in the audio system
- Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio unit
- Steering switch (+) and/or related circuit malfunction
- Poor connection of the connector
- Bluetooth unit does not receive the vehicle speed signal
- Bluetooth unit malfunction
- The volume of the Hands-free telephone system is set at a low level or zero.
- 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.
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