9-5 Aero (9600) L4-2.3L Turbo (2.3HOT) (2004)
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Check first that the control module is awake. The ESP and AHL warning lamps are tested by the control module directly after the ignition is
switched on. If the control module is awake, the fault is probably localised to the lead between the data link connector and the control module.
If Trionic receives no communication from the ESP for 3 seconds during operation, DTC P1625 is set.
Other Systems
Other Systems
All other systems are connected to a bus and communicate with each other via the bus. The DICE is connected by a communications lead to pin 7 of the
data link connector.
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 contact with the DICE, the diagnostic tool has access to all control modules that are connected to a bus.
If, for example, the TCM is contacted, the diagnostic tool will first call the DICE and request diagnostics communication with the TCM. The DICE
passes along the diagnostic tool's request on the I bus, following which the MIU forwards the diagnostics communication request to the P bus and the
TCM.
This means that both the DICE and the MIU must be supplied with current (awakened) before the TCM can be contacted.
