The HFL Messages and Voice Prompts Cannot Be Heard or Are Weak (With Navigation)

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

The HFL messages and voice prompts cannot be heard or are weak (with navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- The HFL telephone sound comes from the front speakers, and the HFL voice prompts come from the center speaker.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Check that the audio system is operating normally and the speaker sound levels from different audio sources (AM/FM, XM, USB, CD or DVD, navigation, etc.).

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) (display is normal) troubleshooting No Sound Is Heard From The Speaker(s) (Display Is Normal) (With Navigation).

3. Do the HFL Self-Diagnostic Function.

Do you hear the message "The hands free system is OK"?

YES -

Intermittent failure, the system is OK at this time.

NO -

Go to step 4.

4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

5. Connect the HDS to the DLC.

6. Turn the ignition switch to ON (II), or press the engine start/ stop button to select the ON mode.

7. Check for DTCs with the HDS.

Are there any DTCs indicated?

YES -

Troubleshoot the indicated DTC(s).

NO -

Go to step 8.

8. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

9. Do the HFL Switch Test HFL Switch Test.

Is the switch OK?

YES -

Go to step 10.

NO -

Replace the audio remote, HFL-navigation voice control switch Overhaul.

10. Disconnect audio-navigation unit connector B (24P) and the HandsFreeLink control unit 28P connector.

11. Check for continuity between HandsFreeLink control unit 28P connector terminals No. 11 and No. 25 and audio-navigation unit connector B (24P) terminals No. 5 and No. 16 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-navigation unit. Replace the affected shielded harness.

12. Check for continuity between body ground and audio-navigation unit connector B (24P) terminals No. 5 and No. 16 individually.





Is there continuity?

YES -

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

NO -

Go to step 13.

13. Check for continuity between the terminals of audio-navigation unit connector B (24P) 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-navigation unit. Replace the affected shielded harness.

NO -

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