The invention provides a magneto-resistive effect device of the CPP structure, having a magneto-resistive effect unit, and a first shield layer and a second shield layer located and formed such that the magneto-resistive effect unit is sandwiched between them, with a sense current applied in a stacking direction. Each chrome line has a width that is less than the critical dimension, and each chrome line of the plurality of chrome lines is spaced apart less than the critical dimension. A cryogenic fluid is flowed through the grindable casing to form a freeze zone of frozen moisture adjacent the grindable casing having a second select diameter. A number of data streams associated with that portion of the interactive television feature are recorded. Further, the existence or non-existence of an operational abnormality of the EGR valve is also jointly determined based on a change in the intake pipe pressure when a valve opening request to the EGR valve is acquired.