Electrical Noise Test

Do this test to check for electrical noise being induced into the audio system.

NOTE:  Electrical noise may be caused by outside sources that cannot be handled by the audio system. Make sure you remove any cell phones and/or turn off any aftermarket devices before beginning this test.

1. Insert the audio Diagnostic CD (07AAZ-SDBA100) into the audio-navigation unit or the audio unit.

2. Play track No. 4 (digital zero) at a normal, or slightly higher than normal, volume level.

3. Operate any electrical device that may create electrical noise in the audio system, including starting the engine, operating the power door locks, turning on the rear window defroster, etc.

4. Play track No. 5 (near digital zero) at a normal, or slightly higher than normal, volume level.

5. Operate any electrical device that may create electrical noise in the audio system, including starting the engine, operating the power door locks, turning on the rear window defroster, etc.

6. Play track No. 6 (SNR) at a normal, or slightly higher than normal, volume level.Operate any electrical device that may create electrical noise in the audio system, including starting the engine, operating the power door locks, turning on the rear window defroster, etc.

• If no abnormal noise is heard, go to Individual Speaker Test.
• If the noise is present only during the SNR track, replace the audio-navigation unit or the audio unit.
• If the noise is heard during the digital zero or near digital zero track, check for:
• • -

    Poor ground for audio-navigation unit or audio unit, engine or battery cable

  • -

    Pinched or shorted speaker wire

  • -

    Faulty audio-navigation unit or audio unit

  • -

    Faulty stereo amplifier

  • -

    Aftermarket devices or aftermarket window tint

  • -

    Other faulty components causing excessive electrical noise (ignition coils, alternator, door lock actuators, etc.). Disconnect or remove any suspect components, and then replay the tracks that were originally noisy. If the noise goes away, check the component and its circuit