Audio System Symptom Troubleshooting - No sound is heard from the speaker(s) (display is normal)
No sound is heard from the speaker(s) (display is normal)
NOTE:
Check the vehicle 12 volt battery condition first.
Set the fader and the balance positions to the center.
Before doing this troubleshooting, go to Audio unit power switch will not turn on (No audio information display and no sound) troubleshooting.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

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

?2.
Turn on the audio unit, and check for sound in each mode (AM/FM, USB, and CD).

Is the sound OK in each mode?

     
YES
     
     
     
Intermittent failure, the system is OK at this time. Check for loose connections at the audio-navigation unit and speaker(s).?
     
NO: No sound is heard in all modes
     
     
     
The failure is duplicated in all modes, go to step 2.
     
NO: No sound is heard in AM/FM mode
     
     
     
     
NO: No sound is heard in USB mode
     
     
     
     
NO: No sound is heard in CD mode
     
     
     
2.
Determine possible failure area (volume level, others):

Determine possible failure area (volume level, others)
?1.
Check that the volume knob is not set to the MIN level.

Is it at the MIN level?

     
YES
     
     
     
Raise the volume level, and recheck the function.?
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (audio unit, others):

Determine possible failure area (audio unit, others)
?1.
Do the Self-Diagnostic Function, and use the speaker check mode.

Did all speakers produce a tone?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Shorted wire check (SPKR lines):

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

?2.
Disconnect the following connector.
NOTE: Eject the disc before disconnecting the audio unit to prevent damaging the CD player's load mechanism.

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. 15
No. 16
No. 19
No. 20
No. 5
No. 6
No. 9
No. 10

Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire(s) between the audio unit and the speaker(s).?
     
NO
     
     
     
The SPKR wires are not shorted to ground. Go to step 5.
5.
Determine possible failure area (speaker, others) 1:

Determine possible failure area (speaker, others) 1
?1.
Check the speaker(s) with no sound for any damage.

Is there any damage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 6.
6.
Determine possible failure area (speaker, others) 2:

Determine possible failure area (speaker, others) 2
?1.
Test the speaker(s).

Is the speaker(s) OK?

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
7.
Open wire check (SPKR lines):

Open wire check (SPKR lines)
?1.
Reconnect the front door speaker 2P connector(s) and the rear door speaker 2P connector(s).

?2.
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. 15
No. 16
About 4 ?
No. 19
No. 20
About 4 ?
No. 5
No. 6
About 4 ?
No. 9
No. 10
About 4 ?

Is the resistance OK?

     
YES: Without tweeter
     
     
     
     
YES: With tweeter
     
     
     
Go to step 8.
     
NO
     
     
     
Repair an open in the wire between the audio unit and the speaker(s).?
8.
Open wire check (FR SPKR (Tweeter) lines):

Open wire check (FR SPKR (Tweeter) lines)
?1.
Connect terminals A and B with jumper wires.


?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio unit connector A (24P): disconnected
 
Left (Right) front door speaker 2P connector: disconnected
 
Audio unit connector A (24P) No. 15 and No. 16: jumped
 
Audio unit connector A (24P) No. 19 and No. 20: jumped
Test point 1
Left tweeter 2P connector No. 1
Test point 2
Left tweeter 2P connector No. 2

Test point 1
Right tweeter 2P connector No. 1
Test point 2
Right tweeter 2P connector No. 2



Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s) between the audio unit and the tweeter.?