All audible warnings are generated by the radio and radio
amplifier. All such warnings are provided to the radio via messages on the
Class 2 serial data line. The Class 2 messages, which produce the required
chimes, are controlled by several modules as follows:
| • | The Key in Ignition Chime Class 2 messages are controlled by the
Instrument Panel Integration Module (IPM). |
| • | The Lamps On Chime messages are controlled by the Dash Integration
Module (DIM). |
| • | The Fasten Belts Chime messages are controlled by the instrument
cluster (IPC). |
| • | The Turn Signal On Chime messages are controlled by the IPC. |
| • | The various warning condition chimes such as Oil Low Pressure
Warning Chime Class 2 messages are sent by the IPC. Each of these has an associated
DIC message and/or IPC Indicator. |
