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 sound1. 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 auxiliary jack assembly to check their condition.
Do all the ports have the same symptom?
YES - Go to step 3.
NO - Faulty auxiliary jack assembly.
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 the function.
4. Disconnect the auxiliary jack assembly 16P connector and audio unit connector D (40P).
5. Check for continuity between the audio unit connector D (40P) and body ground according to the table. Then check the same terminals for continuity to the harness shield terminal D13.
Is there continuity?
YES - Repair short in the wire between the audio unit and the auxiliary jack assembly. Replace the appropriate shielded harness.
NO - Go to step 6.
6. Check for continuity between the audio unit connector D (40P) and auxiliary jack assembly 16P connector according to the table.
Is there continuity?
YES - Faulty auxiliary jack assembly.
NO - Repair open in the wire between the audio unit and the auxiliary jack assembly. Replace the appropriate shielded harness.