Radio (IRC)

The radio is the radio unit seen in the instrument panel of the vehicle, and contains the tape player and the in-dash CD player. The radio receives inputs from Class 2 serial data (power mode, date/time, personalization, chime request, etc.), from the antenna module, and from the interior light dimming circuit. The radio provides output to the radio amplifier (audio, equalization, volume), to the antenna module (power, enable command, signal strength), and to the CD changer (operating commands). The radio uses its input information to generate an output signal which is sent to the radio amplifier. The front panel radio controls can be divided into two groups. Volume and equalization information is created when the volume, balance, fade and tone controls are adjusted. This information is sent to the radio amplifier via Class 2 message, where the equalization is performed. The other front panel button instructions are processed in the radio itself. (Exception: if equipped with a CD changer, operating instructions are transmitted to the changer, where they are performed.) The scan tool has the capability of monitoring the radio switch states, and displaying them. However, checking for proper switch operation does not guarantee that the function is working properly, but only that it is getting the proper command from the switch.

For a description of the RPO Code(s) shown in this image/article refer to the RPO Code List found at Vehicle/Application ID RPO Codes