NHTSA ID Number: 10161816
Manufacturer Communication Number: 15-240-19R
This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimize efficiency while addressing the following customer concerns:
Symptom 1: No audio output is heard but, the volume level displayed changes when turning the knob
Symptom 2: Audio volume increases to maximum intermittently without turning the knob
Symptom 3: A buzzing, screeching or crackling-type sound is heard coming through the speakers
Symptom 4: Loss of audio output after turning the head unit off and back on again in a short amount of time
Symptom 6: No response from the volume control knob.