9-3 Coupe (9400) L4-2.0L Turbo (B204) (1999)
EON is a function which automatically updates the current RDS station for best reception. This means that if for example RDS reception of a station is
updated during a journey, other RDS stations will also be updated for best reception at the same time.
REG (Regional)
REG is a function which can be used to receive only a pre-programmed local radio station, i.e. to lock onto a local radio station without RDS changing
the station due to better signal quality.
Important
This Service Manual does not cover the normal operation of the audio system. Detailed information on its operation is given in the Owner's Manual.
Speed-Dependent Volume
Speed-dependent Volume
Automatic volume control which is controlled by the car's speed to compensate for background noise which occurs when the car is moving. The function
is active at speeds over 60 km/h.
Function
The main instrument unit (MIU) receives a speed signal from the ABS. The MIU sends the information out on the bus where it can be read by the main
unit to control the volume. The level is raised as the speed increases, and lowered as the speed decreases.
Main Unit, Audio System 1
Main Unit, Audio System 1