9-3 Arc/Aero (9440) L4-2.0L Turbo (2.0 T) (2004)
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The control module that is the source of a specific type of information modifies the information as necessary each time it passes. The other control
modules are free to receive and use any relevant messages.
The O-bus has a data rate of 25 Mbit/s. This large capacity means that audio data can be sent in real-time between a playback device or radio receiver
and the amplifiers. The P-bus and I-bus are both connected to the ICM. The ICM relays information between the electrical buses and the O-bus.
None of the modules on the O-bus have a +15 lead. All the modules wake up when they receive a light pulse and remain awake so long as a module is
communicating. Pressing a button on the ICM is the most reliable way to wake the bus immediately.
