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:

Problem verification
?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 channel?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Open wire check (speaker lines) 1:

Open wire check (speaker lines) 1
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Audio unit connector A (24P)
Left front tweeter 2P connector (display audio type)
Right front tweeter 2P connector (display audio type)
Left rear tweeter 2P connector (display audio type)
Right rear tweeter 2P connector (display audio type)

?3.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector A (24P): disconnected
 
Left front tweeter 2P connector: disconnected
 
Right front tweeter 2P connector: disconnected
 
Left rear tweeter 2P connector: disconnected
 
Right rear tweeter 2P connector: disconnected

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

Is the resistance OK?

     
YES: Display audio type
     
     
     
Go to step 4.
     
YES: Color audio type
     
     
     
Go to step 6.
     
NO
     
     
     
Go to step 3.
3.
Speaker check:

Speaker check
?1.
Test the speaker on the faulty speaker lines.

Is the speaker OK?

     
YES
     
     
     
Repair an open in the wire between the audio unit and the speaker.?
     
NO
     
     
     
4.
Open wire check (speaker lines) 2:

Open wire check (speaker lines) 2
?1.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector A (24P): disconnected
 
Left front tweeter 2P connector: disconnected
 
Right front tweeter 2P connector: disconnected
 
Left rear tweeter 2P connector: disconnected
 
Right rear tweeter 2P connector: disconnected

Speaker
Test point 1:
Tweeter 2P connector
Test point 2:
Tweeter 2P connector
Resistance
Left front tweeter
No. 1
No. 2
About 4 ?
Right front tweeter
No. 1
No. 2
About 4 ?
Left rear tweeter
No. 1
No. 2
About 4 ?
Right rear tweeter
No. 1
No. 2
About 4 ?


Is the resistance OK?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Repair an open in the wire between the speaker and the tweeter.?
5.
Tweeter check:

Tweeter check
?1.
Test the tweeter.

Is the tweeter OK?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
6.
Speaker visual check:

Speaker visual check
?1.
Remove the speaker that is duplicating the failure, and check the speaker for any damage.

Is there any damage?

     
YES
     
     
     
     
NO