A method for manufacturing a tunnel junction magnetoresistive sensor having improved magnetic performance and reliability. Critical code is registered for invocation of a critical execution manager in the event of an interruption to the critical code. The scanning device may also generate a texture map for the three dimensional model. The positioning member 23 is capable of positioning the light guide member 9 with respect to a planar direction thereof. A method of assisting the vehicle suspension, steering, and braking systems is also disclosed.