Audio System Symptom Troubleshooting - Audio system sound is weak or distorted (display is normal)
Audio system sound is weak or distorted (display is normal)
NOTE:
Check the vehicle 12 volt battery condition first.
Check the connectors for poor connections or loose terminals.
1.
Problem verification 1:

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

?2.
Go into the System Diagnostic Mode, and use the speaker check mode.

Is there tone from the speakers, and is the tone quality normal in each cannel?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Speaker visual check:

Speaker visual check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove the speaker that is duplicating the failure, and check the speaker for any damage.

Is there any damage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (audio-navigation unit, others):

Determine possible failure area (audio-navigation unit, others)
?1.
Disconnect the following connectors.
Audio-navigation unit connector A (24P)
Left tweeter 2P connector
Right tweeter 2P connector

?2.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio-navigation unit connector A (24P): disconnected
 
Left tweeter 2P connector: disconnected
 
Right tweeter 2P connector: disconnected

Test point 1:
Audio-navigation unit connector A (24P)
Test point 2:
Audio-navigation unit connector A (24P)
Resistance
No. 15
No. 16
About 4 ?
No. 17
No. 18
About 4 ?
No. 5
No. 6
About 4 ?
No. 7
No. 8
About 4 ?

Is the resistance OK?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Speaker check:

Speaker check
?1.
Test the speaker(s) on the faulty speaker lines.

Is the speaker(s) OK?

     
YES
     
     
     
Repair an open or high resistance in the wire(s).?
     
NO
     
     
     
5.
Problem verification 2:

Problem verification 2
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Left front door speaker 2P connector
Right front door speaker 2P connector

?3.
Turn the vehicle to the ON mode.

?4.
Go into the System Diagnostic Mode, and use the speaker check mode.

Is there tone from the tweeters, and is the tone quality normal in each cannel?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for loose connections at the audio-navigation unit and speakers.?
     
NO
     
     
     
The failure is duplicated, go to step 6.
6.
Tweeter visual check:

Tweeter visual check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove the tweeter that is duplicating the failure, and check the tweeter for any damage.

Is there any damage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 7.
7.
Tweeter check:

Tweeter check
?1.
Test the tweeter.

Is the tweeter OK?

     
YES
     
     
     
Repair an open or high resistance in the wire(s).?
     
NO