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Diagnostics communication

Diagnostics communication



In the Saab 9-5, all control modules are connected to a bus with the exception of the ABS and SRS. The bus is divided into a P-bus (Powertrain Bus) and an I-bus (Instrument Bus). Both buses are connected to the main instrument (MIU). The buses are electrically isolated.

The diagnostics tool is not directly connected to a bus, but communicates with DICE, one of the control modules connected to the I-bus and thus has access to all control modules connected to a bus.

All information sent out by a control module is available to all other control modules connected to the bus. The MIU ensures that the information which is available on one bus is also available on the other.

For further information regarding bus and diagnostics communication, refer to Diagnostics communication .