HandsFreeLink Control Unit

The audio unit or the audio-navigation unit has the HFL circuit and the Bluetooth transceiver. The HFL microphone in the roof console is connected directly to the audio unit or the audio-navigation unit. The HFL functions are controlled by the HFL switch.

The audio unit or the audio-navigation unit can check the HFL system components by the System Diagnostic Mode:

• Checks the connection between the audio/navigation system and the internal Bluetooth module (Display audio type).
• Checks the voice input level of the HFL microphone (Display audio type).
• Checks the status of the detection of the HFL switch.