Volume does not change

WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Set the fader and balance positions to the center.

Listen for sound from the speakers.
Is the sound normal?
1. YES - Go to step 2.
2. NO - Go to audio system sound is weak or distorted, or no sound is heard from speakers (see NO SOUND IS HEARD FROM SPEAKERS (DISPLAY IS NORMAL) ).
Operate the volume knob to see if the volume changes.
Does the volume change?
1. YES - Operation is normal.
2. NO - Replace the audio unit.