Symptom Troubleshooting

Symptom Troubleshooting: Bluetooth audio cannot communicate

Bluetooth audio cannot communicate

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

- Check if the audio device functions normally.

- Make sure the audio device is registered before troubleshooting. If the audio device can not be registered, see Bluetooth audio device can not be registered troubleshooting.

1. Turn the ignition switch to ON (II).

2. Turn on the audio unit, and press AUX button to select Bluetooth audio source.

Does it change to Bluetooth Audio source?
YES - Go to step 3.

NO - Substitute a known-good audio unit, Audio Unit Removal/Installation and recheck. If the symptom/indication goes away, replace the original audio unit. Audio Unit Removal/Installation


3. Check if the Bluetooth audio device can be played.

Does the Bluetooth audio play?
YES - Intermittent failure. The audio unit is OK at this time.

NO - Go to step 4.


4. Go to handsfreelink.com and make sure that the phone is approved for the Acura HFL, and if there are any known software bugs or problems.

5. Pair and check the Bluetooth phone on a known-good vehicle equipped with Bluetooth audio.

Does the Bluetooth phone operate normally?
YES - Go to step 6.

NO - Defective Bluetooth phone.


6. Connect the HDS to the DLC, and check for HFL DTCs.

Are there any DTCs indicated?
YES - Go to HFL DTC troubleshooting. B1775

NO - Go to step 7.


7. Go into the Diagnostic mode, and use the System Links diagnosis. Navigation System Diagnostic Mode

Is the Display icon or Audio icon red?
YES - Check for error code to the Error History. How to Troubleshoot the Navigation System

NO - Go to step 8.


8. Turn the ignition switch to ON (II).

9. Disconnect the navigation display unit 20P connector and HandsFreeLink control unit 28P connector.

10. Check for continuity between the navigation display unit 20P connector and the HandsFreeLink control unit 28P connector according to the table.





Is there continuity?
YES - Substitute a known-good HandsFreeLink control unit, Service and Repair and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit. Service and Repair

NO - Repair short in the wire(s) between the HandsFreeLink control unit 28P connector and the navigation display unit. Replace the affected shield harness.