The HFL Messages Cannot Be Heard Or Are Weak (Without Navigation)

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

The HFL messages cannot be heard or are weak (without navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.

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, CD, 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 No sound is heard from the speaker(s) No Sound Is Heard From The Speaker(s) (Display Is Normal) (Without Navigation).

3. Do the HFL Self-Diagnostic Function HandsFreeLink System Self-Diagnostic Function.

Do you hear, "The HFT is OK"?

YES -

Intermittent failure, the system is OK at this time.

NO -

The failure is duplicated, go to step 4.

4. Connect the HDS to the DLC.

5. Clear the DTCs with the HDS.

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

7. Check for DTCs with the HDS.

Are there any DTCs indicated?

YES -

Go to indicated DTC's troubleshooting HandsFreeLink System DTC Troubleshooting Index.

NO -

Go to step 8.

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

9. Do the HFL Switch Test HFL Switch Test.

Is the switch OK?

YES -

Go to step 10.

NO -

Replace the HFL switch HFL Switch Replacement.

10. Disconnect audio unit connector B (12P) and the HandsFreeLink control unit 28P connector.

11. Check for continuity between the HandsFreeLink control unit 28P connector terminals No. 11 and No. 25 and audio unit connector B (12P) terminals No. 9 and No. 10 respectively.





Is there continuity?

YES -

Go to step 12.

NO -

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

12. Check for continuity between body ground and audio unit connector B (12P) terminals No. 9 and No. 10 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 13.

13. 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. Replace the affected shielded harness.

NO -

Substitute a known-good HandsFreeLink control unit, and recheck. If the symptom goes away, replace the original HandsFreeLink control unit. If the symptom does not go away, replace the audio unit Audio Unit Removal/Installation.