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Symptom Troubleshooting




HandsFreeLink System Symptom Troubleshooting - No sound when Bluetooth audio is used

No sound when Bluetooth audio is used

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.
- Set the fader and balance positions to the center.
- Check if the cell phone Bluetooth audio functions normally.
- Make sure the cell phone is properly paired.
- Make sure the client's phone is compatible with the Acura HFL system. See www.acura.com/handsfreelink for more information.

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

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

Is the sound normal?

YES -

Go to step 3.

NO -

Go to Sound Quality Diagnosis Audio System Sound Quality Diagnosis or No sound is heard from speaker(s) No Sound Is Heard From the Speaker(s) (Display Is Normal).

3. Press the DISC/AUX button, and check if it changes to Bluetooth audio source.

Does the audio system change to Bluetooth audio source?

YES -

Go to step 4.

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.

4. Check if it connected when switching to Bluetooth audio screen by pressing the DISC/AUX button.

Is NO CONNECTION displayed?

YES -

Go to Bluetooth cell phone cannot be paired troubleshooting Symptom Troubleshooting.

NO -

Go to step 5.

5. Check if 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 6.

6. Connect the HDS to the DLC.

7. Clear the DTCs with the HDS.

8. Turn the ignition switch to LOCK (0) and then back to ON (II).

9. Check the DTCs with the HDS.

Is there any DTCs indicated?

YES -

Go to indicated DTCs troubleshooting.

NO -

- With AcuraLink, XM receiver: Go to step 10.
- Without XM receiver: Go to step 26.

10. Turn on the audio unit, and check for sound in each mode (XM and USB).

Is the sound normal?

YES -

Go to step 11.

NO -

Go to step 14.

11. Turn the ignition switch to LOCK (0).

12. Disconnect audio unit connector C (14P) and the HandsFreeLink control unit 28P connector.

13. Check for continuity between audio unit connector C (14P) 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 -

There is an open in the wire(s) between the audio unit and the HandsFreeLink control unit.

14. Turn the ignition switch to LOCK (0).

15. Disconnect these connectors:

- Audio unit connector C (14P)
- AcuraLink control unit (XM receiver) connector A (32P)
- XM receiver connector A (14P)
- USB adapter control unit connector A (14P)
- HandsFreeLink control unit 28P connector

16. 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 in the wire(s) between the HandsFreeLink control unit 28P connector and body ground. Replace the affected shielded harness.

NO -

Go to step 17.

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









Is there continuity?

YES -

Go to step 18.

NO -

There is an open in the wire(s) between the audio unit and the HandsFreeLink control unit. Replace the affected shielded harness.

18. 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 wire(s) between the HandsFreeLink control unit and the audio unit connector. Replace the affected shielded harness.

NO -

Go to step 19.

19. Reconnect audio unit connector C (14P) and the HandsFreeLink control unit 28P connector.

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

21. 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) (with AcuraLink), the XM receiver (with XM receiver), or the USB adapter control unit is connected.

NO -

Go to step 22.

22. Turn the ignition switch to LOCK (0).

23. Disconnect the HandsFreeLink control unit 28P connector.

24. Reconnect AcuraLink control unit connector A (32P) (with AcuraLink), XM receiver connector A (14P) (with XM receiver), or USB adapter control unit connector A (14P).

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

26. 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 Service and Repair.

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.

27. Turn the ignition switch to LOCK (0).

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

29. 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 in the wire(s) between the HandsFreeLink control unit 28P connector and body ground. Replace the affected shielded harness.

NO -

Go to step 30.

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









Is there continuity?

YES -

Go to step 31.

NO -

There is an open in the wire(s) between the audio unit and the HandsFreeLink control unit. Replace the affected shielded harness.

31. 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 wire(s) between the audio unit and the HandsFreeLink control unit. Replace the affected shielded harness.

NO -

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.

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