away from a rest position the pcm 12 executes in accord with conventional powertrain control practice a series of powertrain control algorithms to control the powertrain 10 in response to the series of conventional powertrain sensed parameters included in the set of routines to control the powertrain is the routine of fig2 which is executed when a vehicle operator applies power to the system including the powertrain control module 12 and the powertrain 10 such as when the operator rotates the vehicle ignition key to its 34 on 34 position the routine of fig2 is entered upon such power up of the system at a step 50 and proceeds to a step 52 to carry out a conventional initialization process which includes such generally known processes as setting data pointers counters and storage values to initial values such as to zero for use in powertrain control routines executed by the pcm 12 after the initialization step 52 the routine of fig2 proceeds to a step 54 to enable interrupts used in the powertrain control of the present embodiment the enabled interrupts may include event and time based interrupts as are generally understood in the art upon occurrence of any of the enabled interrupts the system is configured to vector control to predetermined interrupt service routines to properly service the interrupts and to return control after the interrupts.