IF YOU CONFIRM The audio display is blank, the unit appears to be turned off and none of the buttons or controls will respond. and Disconnecting then reconnecting the vehicle battery restores correct audio operation. ACTION Check the audio head unit software versions with the procedure on page 3. * If the head unit software versions are not the same as TABLE A, reprogram the audio system software with procedure on page 4. * If the head unit software versions are the same as in TABLE A, this bulletin does not apply. Refer to the Electronic Service Manual (ESM) AV - Audio, Visual & Navigation System for further diagnosis. Please see this bulletin for further details.
