Volume does not change (with navigation)

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
Check the connectors for poor connections or loose terminals.
Set the fader and balance positions to the center.
If the volume button does not change volume with the audio remote switch on the steering wheel, go to audio remote switch does not work properly (see AUDIO REMOTE SWITCH DOES NOT WORK PROPERLY (WITH NAVIGATION) ).

Turn the ignition switch to ON (II).
Turn on the audio-navigation unit and check for sound in each mode. (AM, FM, USB, and CD)
Is the sound normal?

YES -go to step 3.

NO -Go to audio system sound is weak or distorted (see AUDIO SYSTEM SOUND IS WEAK OR DISTORTED (DISPLAY IS NORMAL) ), or no sound is heard from the speaker(s) (see NO SOUND IS HEARD FROM THE SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION) ).
Operate the volume knob to see if the volume changes.
Does the volume change?

YES -Operation is normal.

NO -
- With navigation: Replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
- Without navigation: Replace the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).