Audio System Sound Quality Diagnosis: Notes

Special Tools Required 

Diagnostic CD 07AAZ-SDBA100 

Use the following tests to check sound quality.

NOTE: 

• Before beginning the following tests, write down the bass, the treble, the fader and the balance settings, and then set them to their center positions for testing.
• Always verify the customer's complaint, and compare it a known-good vehicle of the same model and trim under the same conditions using the same inputs (iPod, USB device, etc.). If the complaint is the same on the known-good vehicle, it is a system characteristic.
• Also check that aftermarket speakers are not installed.