9-3 Arc/Aero (9440) L4-2.0L Turbo (2.0 T) (2004)
Part 2
The following are monitored:
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Internal control module faults
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Analog inputs
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Digital inputs
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Outputs
Internal control module faults
Upon starting, the processor (CPU) checks that the check sum is the right one for the ROM. This value is written to the RAM and then read back again to
check that the value is the same as the original one.
During operation, a check is carried out to ensure that the program executes certain routines.
See diagnostic trouble code P0601 for Trionic 8 by way of example.