The HFL Message Cannot Be Heard or Are Weak

The HFL message cannot be heard or are weak

NOTE: Vehicles equipped with AcuraLink, go to 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 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 - Refer to the audio system symptom troubleshooting. Audio System

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

Dose the audio system mute when HFL messages are being played?

YES - Go to step 4.

NO - Go to step 10.

4. Turn the ignition switch to LOCK (0).
5. Remove the audio-HVAC display module assembly, and disconnect audio unit connector C (40P).

NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD/DVD player's load mechanism.

6. Remove the roof console, and disconnect HandsFreeLink control unit 28P connector.
7. Check for continuity between body ground and audio unit connector C (40P) terminal No. 13 and No. 12 individually.

Is there continuity?

YES - Short to body ground in the wire(s) between HandsFreeLink control unit and audio unit. Replace the affected shielded harness.

NO - Go to step 8.

8. Check for continuity between the terminals of audio unit connector C (40P) according to the table.

Is there continuity between any of the terminals?

YES - Short in the wire(s) between HandsFreeLink control unit and audio unit. Replace the affected shielded harness.

NO - Go to step 9.

9. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 11, No. 25 and audio unit connector C (40P) terminal No. 13 and No. 12 individually.

Is there continuity?

YES - Substitute a known-good HandsFreeLink control unit and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit. If the symptom/indication is still present, replace the audio unit.

NO - Open in the wire(s) between HandsFreeLink control unit and audio unit. Replace the affected shielded harness.

10. Turn the ignition switch to LOCK (0).
11. Remove the audio-HVAC display module assembly, and disconnect audio unit connector C (40P).

NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD/DVD player's load mechanism.

12. Remove the roof console, and disconnect HandsFreeLink control unit 28P connector.
13. Check for continuity between body ground and HandsFreeLink control unit 28P connector terminal No. 3.

Is there continuity?

YES - Repair short to body ground in the wire between HandsFreeLink control unit and audio unit.

NO - Go to step 14.

14. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 3 and audio unit connector C (40P) terminal No. 14.