| Possible cause |
- Malfunction in steering switch related parts
- Open or short circuit in the wiring harness between the Hang-up/Pick-up/Talk button and Bluetooth unit
- CAN communication error between the audio unit and Bluetooth unit
- Hang-up/Pick-up/Talk button malfunction
- Poor connection of the connector
- Malfunction in microphone related parts
- Open or short circuit in the wiring harness between the microphone and Bluetooth unit
- Microphone malfunction
- Poor connection of the connector
- Malfunction in audio system
- Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio unit
- Poor connection of the connector
- Bluetooth unit does not respond
- Bluetooth unit malfunction
- Open or short circuit in the wiring harness between the Bluetooth unit and the audio unit
- Open or short circuit in the wiring harness of the Bluetooth unit power supply or ground circuit
- Poor connection of the connector
- Problem in cellular phone
- Cellular phone does not set up to Bluetooth system
- Cellular phone does not operate (low battery voltage, power off)
- Cellular phone is outside of the signal transmission area
- Bluetooth does not operate
- A cellular phone other than a Hands-free telephone system-enabled models is used.
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