DICE And All Systems Connected To The Bus Except The Diesel Engine Control Module: Notes

WARNING: This page is about a different car, the 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Diagnostics Circuit Diagram (DICE) (1 Of 3)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Diagnostics Circuit Diagram (DICE) (2 Of 3)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 3: Diagnostics Circuit Diagram (DICE) (3 Of 3)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

DICE is connected with a communication lead to the data link connector pin 7.

The diagnostic tool communicates digitally and serially with the DICE. Digitally means that the voltage difference between the lead and ground has only two values, in this case about 0 V and B+.

Serial means that the information is sent in "packets" which are transmitted one after the other in rapid succession.

Through its connection with DICE, the diagnostic tool has access to all the control modules on the bus.

If, for example, MIU is to be contacted, the diagnostic tool first calls DICE.

This means that DICE must be powered (awake) so that MIU can make contact.