Diesel Data: Automotive Repair

No Sound Is Heard From The Speaker(s) (Display Is Normal) (Without Navigation and Premium Audio)






Audio System Symptom Troubleshooting - No sound is heard from the speaker(s) (display is normal)

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

NOTE:
* Check the vehicle battery condition first Battery Test.
* Set the fader and the balance positions to the center.
* Before doing this troubleshooting, go to Audio unit power switch will not turn on (No information display and no sound) troubleshooting Audio Unit Power Switch Will Not Turn On (No Information Display And No Sound).
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

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

Is the sound OK in each mode?
-YES- Intermittent failure, the system is OK at this time. Check for loose connections at the audio unit and speaker(s).
-NO- The failure is duplicated in all modes, go to step 2.
-NO- Go to Poor AM or FM radio reception interference troubleshooting Poor AM or FM Radio Reception Or Interference (Without Navigation).
-NO- Go to USB input sound is low or cannot be heard troubleshooting USB Input Sound Is Low Or Can Not Be Heard (Without Navigation).
-NO- Go to Audio disc does not play troubleshooting Audio Disc Does Not Play.

2. Determine possible failure area (volume level, others):

Determine possible failure area (volume level, others)
-1. Check that the volume button is not set to the min level.

Is it at the MIN level?
-YES- Raise the volume level, and recheck the function.
-NO- Go to step 3.

3. Determine possible failure area (audio unit, others):

Determine possible failure area (audio unit, others)
-1. Do the Self-Diagnostic Function, and use the Speaker Check Mode Audio System Self-Diagnostic Function.

Did all speakers produce a tone?
-YES- Replace the audio unit Audio Unit Removal and Installation.
-NO- Go to step 4.

4. Shorted wire check (SPKR lines):

Shorted wire check (SPKR lines)
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.
NOTE: Eject all the discs before disconnecting the audio unit to prevent damaging the CD player's load mechanism.





-3. Check for continuity between these test points and body ground individually.














Is there continuity?
-YES- Repair a short to body ground in the wire(s) between the audio unit and the speaker(s).
-NO- Go to step 5.

5. Determine possible failure area (speaker, others) 1:

Determine possible failure area (speaker, others) 1
-1. Check the speaker(s) with no sound for any damage.

Is there any damage?
-YES- Replace the faulty front door speaker(s) Front Door Speaker Removal, Installation, and Test (4-door).
-YES- Replace the faulty rear speaker(s) Rear Speaker Removal, Installation, and Test (4-door).
-YES- Replace the faulty tweeter(s) Tweeter Removal and Installation.
-NO- Go to step 6.

6. Determine possible failure area (speaker, others) 2:

Determine possible failure area (speaker, others) 2
-1. Disconnect the following connector(s).





-2. Test the speaker(s):
* Front door speaker Front Door Speaker Removal, Installation, and Test (4-door)
* Rear speaker Rear Speaker Removal, Installation, and Test (4-door)
* Tweeter Tweeter Test

Is the speaker(s) OK?
-YES- Go to step 7.
-NO- Replace the faulty front door speaker(s) Front Door Speaker Removal, Installation, and Test (4-door).
-NO- Replace the faulty rear speaker(s) Rear Speaker Removal, Installation, and Test (4-door).
-NO- Replace the faulty tweeter(s) Tweeter Removal and Installation.

7. Open wire check (SPKR lines):

Open wire check (SPKR lines)
-1. Reconnect speaker connector(s).

-2. Measure the resistance between test points 1 and 2.














Is the resistance OK?
-YES- Go to step 8.
-YES- Replace the audio unit Audio Unit Removal and Installation.
-NO- Repair an open in the wire between the audio unit and the speaker(s).

8. Open wire check (FR SPKR (Tweeter) lines):

Open wire check (FR SPKR (Tweeter) lines)
-1. Disconnect the following connector.





-2. Connect terminals A and B with a jumper wire.

















-3. Check for continuity between test points 1 and 2.


















Is there continuity?
-YES- Replace the audio unit Audio Unit Removal and Installation.
-NO- Repair an open in the wire(s) between the audio unit and the tweeter.