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):

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

?2.
Disconnect the following connectors.
Stereo amplifier connector A (18P)
Stereo amplifier connector B (8P)

?3.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Stereo amplifier connector A (18P): disconnected
 
Stereo amplifier connector B (8P): disconnected

Test point 1:
Stereo amplifier connector A (18P)
Test point 2:
Stereo amplifier connector A (18P)
Resistance
No. 2
No. 4
About 2 ?
No. 5
No. 6
About 4 ?
No. 7
No. 8
About 4 ?
No. 9
No. 10
About 4 ?
No. 11
No. 18
About 4 ?
No. 12
No. 13
About 4 ?
No. 14
No. 15
About 3.2 ?
No. 16
No. 17
About 3.2 ?

Test point 1:
Stereo amplifier connector B (8P)
Test point 2:
Stereo amplifier connector B (8P)
Resistance
No. 1
No. 2
About 4 ?
No. 3
No. 4
About 4 ?
No. 5
No. 6
About 3.2 ?
No. 7
No. 8
About 3.2 ?

Is the resistance OK?

     
YES
     
     
     
Go to step 4.
     
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 a faulty speaker wire(s) between the stereo amplifier and the speaker.?
     
NO
     
     
     
4.
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