Symptom Troubleshooting

HandsFreeLink System Symptom Troubleshooting - The HFL messages cannot be heard or are weak

The HFL message 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, 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.�

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

Does 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. Disconnect audio unit connector F (20P).

6. Disconnect the HandsFreeLink control unit 28P connector.

7. Check for continuity between body ground and HandsFreeLink control unit 28P connector terminal No. 11 and No. 25 individually.





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 8.

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









Is there continuity between any of the terminals?

YES -

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

NO -

Go to step 9.

9. Check for continuity between the HandsFreeLink control unit 28P connector and audio unit connector F (20P) 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. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation.�

NO -

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

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

11. Disconnect audio unit connector F (20P).

12. Disconnect the 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 a short to body ground in the wire between the HandsFreeLink control unit and the audio unit.�

NO -

Go to step 14.

14. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 3 and audio unit connector F (20P) terminal No. 20.





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 If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation.�

NO -

Repair an open in the wire between the HandsFreeLink control unit and the audio unit.�