Wired Headphone Sound Is Weak, Distorted, Volume Does Not Change, Or There Is No Sound

Rear Entertainment System Symptom Troubleshooting - Wired headphone sound is weak, distorted, volume does not change, or there is no sound

Wired headphone sound is weak, distorted, volume does not change, or there is no sound

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- You need to switch the audio unit REAR PWR button on for the rear display, remote controls, and sound to operate.
- Check the headphone battery condition.

1. Substitute a known-good wired headphone set, and recheck.

Does the symptom go away?

YES -

Original wired headphone set is faulty.�

NO -

Go to step 2.

2. Plug the wired headphones into the other ports of the RES auxiliary jack assembly to check their condition.

Do all the ports have the same symptom?

YES -

Go to step 3.

NO -

Replace the RES auxiliary jack assembly RES Auxiliary Jack Assembly Replacement.�

3. Check that the wired headphone jack is properly connected.

Is the headphone jack connected properly?

YES -

Go to step 4.

NO -

Reconnect the wired headphone connector, and recheck.�

4. Disconnect audio unit connector F (28P) and the RES auxiliary jack assembly 14P connector.

5. Check for continuity between body ground and audio unit connector F (28P) according to the table.









Is there continuity?

YES -

There is a short in the wire(s) between the audio unit and the RES auxiliary jack assembly. Replace the affected shielded harness.�

NO -

Go to step 6.

6. Check for continuity between the terminal of audio unit connector F (28P) according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio unit and the RES auxiliary jack assembly. Replace the affected shielded harness.�

NO -

Go to step 7.

7. Check for continuity between audio unit connector F (28P) and RES auxiliary jack assembly 14P connector according to the table.













Is there continuity?

YES -

Replace the RES auxiliary jack assembly RES Auxiliary Jack Assembly Replacement.�

NO -

There is an open in the wire(s) between the audio unit and the RES auxiliary jack assembly. Replace the affected shielded harness.�