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 will not turn on (No 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.
Go into the System Diagnostic Mode or the Self-Diagnostic Function, 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 2.
2.
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

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

With Normal Audio
Connector
Terminal
Audio unit connector A (24P)
No. 5
No. 6
No. 9
No. 10
No. 15
No. 16
No. 19
No. 20

Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire(s).?
     
NO