Audio System Symptom Troubleshooting - No sound is heard from all the speakers (display is normal)
No sound is heard from all the speakers (display is normal)
NOTE:
Check the vehicle 12 volt battery condition first.
Before doing this troubleshooting, go to Audio unit power will not turn on (No information display) troubleshooting.
Check the connectors for poor connections or loose terminals.
1.
Operation check:

Operation check
?1.
Turn the vehicle to the ON mode.

?2.
Check that the volume level is not set to the MIN level.

Is it at the MIN level?

     
YES
     
     
     
Raise the volume level, and recheck the function.?
     
NO: Display audio type (USA and Canada production)
     
     
     
Go to step 4.
     
NO: Display audio type (except USA and Canada production)
     
     
     
Go to step 2.
     
NO: Color audio type
     
     
     
Go to step 4.
2.
Audio system check:

Audio system check
?1.
Check if the center display unit keeps indicating audio mute indication.

Is audio mute indication displayed?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 4.
3.
Open wire check (ACC line):

Open wire check (ACC line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Audio unit connector A (24P)

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Audio unit connector A (24P): disconnected
Test point 1
Audio unit connector A (24P) No. 13
Test point 2
Body ground

Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire.?
4.
Problem verification:

Problem verification
?1.
Go into the System Diagnostic Mode, and use the speaker check mode.

Did all speakers produce a tone?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for loose connections at the audio unit and speakers. If the tone is weak or distorted, go to Audio system sound is weak or distorted (display is normal) troubleshooting.?
     
NO
     
     
     
The failure is duplicated, go to step 5.
5.
Shorted wire check (SPKR lines) 1:

Shorted wire check (SPKR lines) 1
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Audio unit connector A (24P)

?3.
Check for continuity between these test points and body ground individually.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector A (24P): disconnected

Connector
Terminal
Audio unit connector A (24P)
No. 5
No. 6
No. 7
No. 8
No. 15
No. 16
No. 17
No. 18

Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire(s).?
     
NO
     
     
     
The SPKR wires are not shorted to ground. Go to step 6.
6.
Shorted wire check (SPKR lines) 2:

Shorted wire check (SPKR lines) 2
?1.
Measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector A (24P): 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
     
     
     
     
NO
     
     
     
Repair a short in the wires.?