Inspection Procedure 5: Audio Illuminations Does Not Work Normally: Notes
WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Before replacing the radio and CD player, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
Fig 1: Center Panel Unit Communication Circuit Diagram