Phase Test

Do this test to confirm proper speaker phasing.

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

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

3. The voice should sound centered and focused when it indicates it is in-phase

4. The voice should sound diffused, and have less bass when it indicates it is out of phase.

If the voice changes from in-phase to out of phase as indicated by the prompt, the phasing is correct. Go to Electrical Noise Test.
If the voice always sounds out of phase, phasing is not correct. Check for:
- Shorted speaker wire
- Faulty audio-navigation unit or audio unit
- Faulty stereo amplifier
- Shorted speaker
- Open in speaker wire
- Loose connection or poor pin fit
- Aftermarket audio components like amplifiers, speakers, etc.