Symptom Troubleshooting

Symptom Troubleshooting: No sound when Bluetooth audio is used

No sound when Bluetooth audio is used (with navigation)

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

- Set the fader and balance positions to the center.

- Check if the cell phone with Bluetooth audio functions normally.

- Make sure the cell phone is properly paired.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Turn on the audio-navigation unit, and check for sound in each mode (AM, FM, XM, and CD).

Is the sound is normal?
YES - Go to step 3.

NO - Go to Sound Quality Diagnosis Sound Quality Diagnosis - Left/Right Channel ID or no sound is heard from speaker(s). No Sound Is Heard From the Speaker(s) (Display Is Normal) (With Navigation)


3. Press the AUX button, and check if it changes to Bluetooth Audio source.

Does it change to Bluetooth Audio source?
YES - Go to step 4.

NO - Substitute a known-good audio-navigation unit (including the HDD), Audio-Navigation Unit Removal/Installation (With Navigation) and recheck. If the symptom/indication goes away, replace the original audio-navigation unit.


4. Check if it is connected when switching to Bluetooth Audio screen by pressing the AUX button.

Is NO CONNECTION is displayed?
YES - Go to symptom troubleshooting for the Bluetooth audio device cannot be registered.

NO - Go to step 5.


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

Does the bluetooth audio play?
YES - Intermittent failure, the audio-navigation unit is OK at this time.

NO - Go to step 6.


6. Connect the HDS to the DLC. Check for HFL DTCs.

Is there any DTCs indicate?
YES - Go to HFL DTC troubleshooting. B1775

NO - Go to step 7.


7. Turn on the audio-navigation unit, and check for XM radio sound.

Is the sound is normal?
YES - Go to step 8.

NO - Go to step 11.


8. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

9. Disconnect audio-navigation unit connector C (14P) and the HandsFreeLink control unit 28P connector.

10. Check for continuity between audio unit connector C (14P) and 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.

NO - There is an open in the wire(s) between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.






11. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

12. Disconnect these items:
- Audio-navigation unit connector C (14P)

- AcuraLink control unit (XM receiver) connector A (32P) (USA models)

- XM receiver connector A (14P) (Canada models)

- HandsFreeLink control unit 28P connector

13. Check for continuity between the HandsFreeLink control unit 28P connector and body ground according to the table.





Is there continuity?
YES - There is a short to body ground in the wire(s) between the audio-navigation unit, then AcuraLink control unit (XM receiver) or XM receiver, and the HandsFreeLink control unit. Replace the affected shielded harness.

NO - Go to step 14.






14. Check for continuity between audio-navigation unit connector C (14P) and the HandsFreeLink control unit 28P connector according to the table.





Is there continuity?
YES - Go to step 15.

NO - There is an open in the wire(s) between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.






15. Check for continuity between the terminals of the HandsFreeLink control unit 28P connector according to the table.





Is there continuity?
YES - There is a short in the wires between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shield harness.

NO - Go to step 16.






16. Reconnect the audio-navigation unit connector C (14P) and the HandsFreeLink control unit 28P connector.

17. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

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

Does the Bluetooth audio play?
YES - Internal malfunction in unit where a connector for either the AcuraLink control unit (XM receiver) (USA models) or the XM receiver (Canada models) is connected.

NO - Go to step 19.


19. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

20. Remove the center console panel. Center Console Panel Removal/Installation

21. Disconnect the HandsFreeLink control unit 28P connector. Service and Repair

22. Reconnect AcuraLink control unit connector A (32P) (USA models) or XM receiver connector A (14P) (Canada models).

23. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

24. Check the operation of the reconnected unit.

Is the system normal?
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.

NO - Substitute a known-good audio-navigation unit (including the HDD), Audio-Navigation Unit Removal/Installation (With Navigation) and recheck. If the symptom/indication goes away, replace the original audio-navigation unit.