Audio System Symptom Troubleshooting - Auxiliary input sound is low or cannot be heard
Auxiliary input sound is low or cannot be heard
NOTE:
Check the vehicle 12 volt battery condition first.
Set the fader and the balance positions to the center.
Use auxiliary stereo cables with 3.5 mm ends only.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Connect an auxiliary accessory to the auxiliary input jack.

?3.
Turn on the audio system, and press the CD/AUX button to select the AUX mode.

?4.
Check the auxiliary audio source sound.

Is the sound normal?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Determine possible failure area (auxiliary audio accessory, others):

Determine possible failure area (auxiliary audio accessory, others)
?1.
Substitute a known-good auxiliary audio accessory and/or auxiliary stereo cable, and recheck.

Is the sound normal?

     
YES
     
     
     
Original auxiliary audio accessory or auxiliary stereo cable is faulty.?
     
NO
     
     
     
The failure is duplicated, go to step 3.
3.
Auxiliary jack check (substitution):

Auxiliary jack check (substitution)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Substitute a known-good auxiliary jack (audio panel), and recheck.

Does the symptom go away?

     
YES
     
     
     
Replace the original auxiliary jack (audio panel).?
     
NO