No Sound Is Heard From Speaker(s) (Display Is Normal)

No sound is heard from speaker(s) (display is normal)

NOTE:
- Check that the volume button is not set to min level.
- Set the fader and balance positions to the center.
- Before performing symptom troubleshooting, do the power switch will not turn ON troubleshooting.
- For vehicles with a factory installed audio unit, do the self-diagnostic function, speaker check to help isolate the faulty speaker.
- Some models do not have rear speaker (s).

1. Check to see if there are specific speaker(s) that have no sound.

Are there specific speaker(s) with no sound?

YES - Go to step 2.

NO - If all speaker(s) are inoperative, Go to step 6.

2. Turn the ignition switch OFF.
3. Check the speaker(s) with no sound for damage.

Is there any damage?

YES - Substitute the speaker(s) and recheck.

NO - Go to step 4.

4. Remove the speaker(s) with no sound, and disconnect the connector.
5. Check the speaker 2P connector for a loose or poor connection.

Reconnect the speaker 2P connector and recheck the symptom; does it still fail?

YES - Go to step 6.

NO - There was a poor connection; verify that the loose or poor connection is fixed.

6. Disconnect speaker 2P connector.
7. Measure the resistance between the No. 1 and No. 2 terminals of the speaker connector.

Is there about 40 ohms?

YES - Go to step 8.

NO - Faulty speaker (s).

8. Remove the audio unit. Disconnect the audio unit connector A (17P).




9. With all speaker(s) connected, check the resistance between the following terminals of the audio unit connector A (17P) according to the table.

Is there about 4 ohms?

YES - Go to step 10.

NO - Repair open in the wire between the audio unit and the speaker.

10. Disconnect the speaker 2P connector.




11. Check for continuity between body ground and audio unit connector A (17P) terminals No. 2,3, 7, 8, 11,12, 15 and 16 individually.

Is there continuity?

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

NO - Substitute a known - good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit.