Volume Does Not Change

Audio System Symptom Troubleshooting - Volume does not change (with navigation)

Volume does not change (with navigation)

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- Set the fader and balance positions to the center.

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

2. Turn on the audio-navigation unit, and check for sound in each mode (AM, FM, XM, and CD).

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 speaker(s) No Sound Is Heard From the Speaker(s) (Display Is Normal).�

3. Operate the volume knob to see if the volume changes.

Does the volume change?

YES -

Operation is normal.�

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. Disconnect the audio switch panel 24P connector and audio-navigation unit connector F (12P).

6. Check for continuity between the audio-navigation switch panel 24P connector terminals No. 5 and No. 12 and audio-navigation unit connector F (12P) terminals No. 1 and No. 13 respectively.





Is there continuity?

YES -

Go to step 7.

NO -

There is an open in the wire(s) between the audio-navigation unit and the audio-navigation switch panel. Replace the affected shielded harness.�

7. Check for continuity between the audio-navigation switch panel 24P connector and body ground according to the table.









Is there continuity?

YES -

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

NO -

Go to step 8.

8. Check for continuity between the terminals of audio-navigation switch panel 24P connector according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio-navigation unit and the audio-navigation switch panel. Replace the affected shielded harness.�

NO -

Substitute a known-good audio-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom-indication goes away, replace the original audio-navigation unit. If the symptom is still present, substitute a known-good audio-navigation switch panel Audio-Navigation Switch Panel Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation switch panel.�