Audio System Symptom Troubleshooting - Volume does not change
Volume does not change
NOTE: Set the fader and balance positions to the center.
  1. Listen for sound from the speakers.
Is the sound normal?
YES -
Go to Step 2 .
NO -
Go to audio system sound is weak or distorted, or no sound is heard from speakers. ■
  1. Operate the volume knob to see if the volume changes.
Does the volume change?
YES -
Operation is normal.■
NO -
Replace the audio unit.■