Volume Does Not Change

Volume does not change

NOTE:
- Check the vehicle battery condition first.
- Check the connectors for poor connections or loose terminals.
- Set the fader and balance positions to the center.

1. Turn the ignition switch to ON (II),
2. Turn on the audio unit and check for sound in each mode (AM, FM, XM, and CD).

Is the sound normal?

YES - Go to step 3.

NO - Go to Sound Quality Diagnosis Sound Quality Diagnosis or no sound is heard from speaker(s) with premium audio system, without premium audio system.

3. Operate the volume knob to see if the volume changes.

Does the volume change?

YES - Operation is normal.

NO - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the audio unit.