Theory Of Operation
WARNING: This page is about a different car, the 2014 Fiat 500e. However, it is still accessible from the selected car via links, so may be relevant.
The (X51) Left Rear Audio (+) circuit and the (X57) Left Rear Audio (-) circuit are outputs of the Radio. The Radio controls and monitors these circuits for a concern.
For a detailed description of the Audio System, refer to DESCRIPTION .
For additional information regarding the operation of the Audio System, refer to OPERATION .