AcuraLink Messages Cannot Be Heard or Are Weak

AcuraLink Symptom Troubleshooting - AcuraLink messages cannot be heard or are weak

AcuraLink messages cannot be heard or are weak

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

2. Check that the audio system is operating normally and the speaker sound levels are normal from different audio sources (AM/FM, XM, CD/DVDs, Navigation, etc.).

Does the audio system work normally and is the audio output from the speaker normal when playing various audio sources?

YES -

Go to step 3.

NO -

Go to the audio system symptom troubleshooting.

3. Check the audio system when AcuraLink messages are played.

Does the audio system mute when AcuraLink messages are being played?

YES -

If the audio system mutes and plays the messages at a normal volume, the system is OK at this time. If the messages are weaker than normal, go to step 4.

NO -

Check for B-CAN codes. Repair any B-CAN codes, then recheck. If there are no B-CAN codes, substitute a known-good AcuraLink control unit (XM receiver) AcuraLink Control Unit-XM Receiver Removal/Installation.

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

5. Disconnect these connectors:

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

6. Check for continuity between AcuraLink control unit (XM receiver) connector A (32P) and audio unit connector B (14P) according to the table.









Is there continuity?

YES -

Go to step 7.

NO -

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

7. Check for continuity between AcuraLink control unit (XM receiver) connector A (32P) and body ground according to the table.









Is there continuity?

YES -

There is a short to body ground in the wire(s) between the AcuraLink control unit (XM receiver) and the audio unit. Replace the affected shielded harness.

NO -

Go to step 8.

8. Check for continuity between the terminals of AcuraLink control unit (XM receiver) connector A (32P) according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wire(s) between the AcuraLink control unit (XM receiver) and the audio unit. Replace the affected shielded harness.

NO -

Go to step 9.

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

10. Measure the voltage between AcuraLink control unit (XM receiver) connector A (32P) and body ground according to the table.









Is there less than 0.2 V?

YES -

Go to step 11.

NO -

There is a short to ground in the wire(s) between the AcuraLink control unit (XM receiver) and the audio unit. Replace the affected shielded harness.

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

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









Is there continuity?

YES -

Go to step 13.

NO -

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

13. Check for continuity between audio unit connector C (28P) and body ground according to the table.









Is there continuity?

YES -

There is a short to body ground in the wire(s) between the HandsFreeLink control unit and the audio unit. Replace the affected shielded harness.

NO -

Go to step 14.

14. Check for continuity between the terminals of audio unit connector C (28P) according to the table.









Is there continuity between the terminals?

YES -

There is a short to the wire(s) between the AcuraLink control unit (XM receiver), the HandsFreeLink control unit and the audio unit. Replace the affected shielded harness.

NO -

Go to step 15.

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

16. Substitute a known-good AcuraLink control unit (XM receiver) AcuraLink Control Unit-XM Receiver Removal/Installation, and recheck the function.

Does the problem go away?

YES -

Update the AcuraLink control unit Programming and Relearning, if it does not have the latest software, then recheck. If the software is the latest, replace the AcuraLink control unit (XM receiver) AcuraLink Control Unit-XM Receiver Removal/Installation.

NO -

Replace the audio unit Audio Unit Removal/Installation (With Navigation System).