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: With stereo amplifier
     
     
     
The failure is duplicated, go to step 2.
     
NO: Without stereo amplifier
     
     
     
The failure is duplicated, go to step 5.
2.
Determine possible failure area (speaker lines, others):

Determine possible failure area (speaker lines, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

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

?3.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Stereo amplifier connector A (18P): 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 ?*1
About 3.2 ?*2
No. 9
No. 10
About 4 ?*1
About 3.2 ?*2
No. 12
No. 13
About 4 ?
No. 14
No. 15
About 3.2 ?
No. 16
No. 17
About 3.2 ?
*1: Connect rear door speaker connector and disconnect rear tweeter connector.
*2: Disconnect rear door speaker connector and connect rear tweeter connector.

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).?
     
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
     
     
     
5.
Determine possible failure area (speaker lines, others):

Determine possible failure area (speaker lines, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Audio-navigation unit connector A (24P) (with navigation)
Audio unit connector A (24P) (without navigation)
Left front tweeter 2P connector
Right front tweeter 2P connector
Left rear tweeter 2P connector
Right rear tweeter 2P connector

?3.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio-navigation unit connector A (24P) (with navigation): disconnected
Audio unit connector A (24P) (without navigation): 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-navigation unit connector A (24P) (with navigation)

Audio unit connector A (24P) (without navigation)
Test point 2:
Audio-navigation unit connector A (24P) (with navigation)

Audio unit connector A (24P) (without navigation)
Resistance
No. 5
No. 6
About 4 ?*1
About 3.2 ?*2
No. 7
No. 8
About 4 ?*1
About 3.2 ?*2
No. 15
No. 16
About 4 ?*1
About 3.2 ?*2
No. 17
No. 18
About 4 ?*1
About 3.2 ?*2
*1: Connect door speaker connector and disconnect tweeter connector.
*2: Disconnect door speaker connector and connect tweeter connector.

Is the resistance OK?

     
YES: With navigation
     
     
     
     
YES: Without navigation
     
     
     
     
NO
     
     
     
Go to step 6.
6.
Speaker check:

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

Is the speaker OK?

     
YES
     
     
     
Repair an open in the wire.?
     
NO