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Symptom Troubleshooting




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

No sound when Bluetooth audio is used (with navigation)

NOTE:

- Before doing this troubleshooting, refer to General Troubleshooting Information Initial Inspection and Diagnostic Overview to make sure the phone is compatible and configured correctly. You can also check online at www.acura.com/handsfreelink, or call the HFL support desk at 888-528-7876.
- 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 with Bluetooth audio functions normally.
- Make sure the cell phone is properly paired.

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

2. Turn on the audio-navigation 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 the speaker(s) No Sound Is Heard From the Speaker(s) (Display Is Normal) (With Navigation).�

3. Press the USB/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, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.�

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

Is NO CONNECTION is displayed?

YES -

Go to Bluetooth cell phone cannot be paired Bluetooth Cell Phone Cannot Be Paired.�

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.�

NO -

Go to step 7.

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

Is the sound normal?

YES -

Go to step 8.

NO -

Go to step 11.

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

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

10. Check for continuity between audio-navigation unit connector D (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-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.�

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

12. Disconnect these items:

- Audio-Navigation unit connector D (14P)
- AcuraLink control unit (XM receiver) connector A (32P) (with AcuraLink)
- XM receiver connector A (14P) (without AcuraLink)
- HandsFreeLink control unit 28P connector

13. Check for continuity between body ground and the HandsFreeLink control unit 28P connector 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 D (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 between any of the terminals?

YES -

There is a short in the wires between the audio-navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.�

NO -

Go to step 16.

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

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

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) or the XM receiver is connected.�

NO -

Go to step 19.

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

20. Disconnect the HandsFreeLink control unit 28P connector.

21. Reconnect AcuraLink control unit connector A (32P) or XM receiver connector A (14P).

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

23. 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-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.�

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