System overview

System overview

System overview, operation, cars with Trionic T5 or Motronic engine management system

System overview, operation, cars with EDC 15 engine management system

System overview, bus-connected components, cars with Trionic T7 engine management system

1.	Trionic T7, engine management system (430b, 589b)

2.	TCM (Transmission Control Module) (502b)

3.	P bus (Powertrain bus)

4.	MIU (Main Instrument Unit) (540)

5.	I bus (Instrument bus)

6.	DICE (Dashboard Integrated Central Electronics) (628)

7.	SID (Saab Information Display) (541)

8.	Audio system, main unit (353)

9.	ACC, (Automatic Climate Control) (216)

10.	PSM, (Power Seat Memory), (357Dk)

11.	TWICE (Theft Warning Integrated Central Electronics) (632)

12.	STC, (Soft Top Control), (565)

13.	CDC (CD changer) (355)

System overview, bus-connected components, cars with EDC 15 engine management system

1.	EDC 15, (Electronic Diesel Control) (595)

2.	Diesel pump (598)

3.	P bus (Powertrain bus)

4.	MIU (Main Instrument Unit) (540)

5.	I bus (Instrument bus)

6.	DICE (Dashboard Integrated Central Electronics) (628)

7.	SID (Saab Information Display) (541)

8.	Audio system, main unit (353)

9.	ACC, (Automatic Climate Control) (216)

10.	PSM, (Power Seat Memory), (357Dk)

11.	TWICE (Theft Warning Integrated Central Electronics) (632)

12.	CDC (CD changer) (355)

System overview, bus-connected components, cars with Trionic T5 or Motronic engine management system

1.	MIU (Main Instrument Unit) (540)

2.	I bus (Instrument bus)

3.	DICE (Dashboard Integrated Central Electronics) (628)

4.	SID (Saab Information Display) (541)

5.	Audio system, main unit (353)

6.	ACC, (Automatic Climate Control) (216)

7.	PSM, (Power Seat Memory), (357Dk)

8.	TWICE (Theft Warning Integrated Central Electronics) (632)

9.	STC, (Soft Top Control), (565)

10.	CDC (CD changer) (355)

System overview, components connected to K lead

1.	DICE (Dashboard Integrated Central Electronics) (628)

2.	MIU (Main Instrument Unit) (540)

3.	Data link connector (H16-5/445)

4.	ABS (Anti-lock Brake System) (547)

5.	EDC 15, (Electronic Diesel Control) (595)

6.	Airbag (SRS) (331)

7.	DAH (Diesel Additional Heater) (597)

8.	TCM (Transmission Control Module) (502a). K line is only present on cars with Trionic T5 or Motronic engine management system

9.	Trionic T5, engine management system (430a/589a)

10.	Motronic 2.10.3, engine management system (505)

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 M00. 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.

System overview, brief description, cars with the EDC 15 engine management system

The two powertrain systems EDC 15 and the diesel pump are not connected to the I bus. These systems require much faster communication so that there are no noticeable delays, when EDC requests a new fuel mass per injection or a new injection angle.

Therefore, they are connected to a separate bus called the P bus (Powertrain Bus). Communication on the P bus is ten times faster than on the I bus.

The P bus is also connected to MIU. The MIU is responsible for making the information that is available on one of the buses also available on the other. The other powertrain systems, Trionic, Motronic and TCM, as well as the auxiliary heater for diesel engines, are not connected to the bus. Note also that EDC 15 has a separate K lead to the diagnostic tool.

All the other bus systems communicate with the diagnostic tool via DICE, one of the I bus control modules.

System overview, brief description, cars with a Trionic T5 or Motronic engine management system

Cars with a Trionic T5 or Motronic engine management system have no bus connection for the powertrain systems.

The powertrain systems (Trionic T5, Motronic and TCM) are connected by a line to the MIU. The MIU ensures that information is available on the I bus.

The bus enables a large volume of information to be exchanged between the control modules using only two lines.

All bus systems communicate with the diagnostics instrument via DICE, one of the I bus systems.