9-3 SE Hatchback (9400) L4-2.0L Turbo (B205) HO (2000)
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System overview, brief description, cars with Trionic T7 engine management system
Two alternative engines, B205L and B205R with the Trionic T7 engine management system, have been added for MOO. This will make the bus system
nearly identical with that of the Viggen.
The bus enables large volumes of information to be exchanged between the control modules using only two lines. The bus is divided into the Powertrain
bus (P bus) and the Instrument bus (I bus).
As before, other petrol engine variants having a Motronic 2.10 or Trionic T5 engine management system have no bus connections. The two powertrain
systems, Trionic and TCM, need fast communication so that no delays will be noticeable, such as in connection with torque limitation when shifting.
The Trionic and TCM are connected to the P bus which has a data transfer rate ten times faster than the I bus.
The P bus and I bus are connected to the MIU. The MIU ensures that information available on one bus is also available on the other bus.
