You are absolutely right. even whenever i discussed it with professionals (i.e Honda dealer, engineer), they gave me HIT & TRIAL formula. they even don't have any procedure to diagnose the actual fault. the so called scanner every time tells the faulty temperature torque sensor whatever the fault is something else. they change all parts one by one... its your luck when faulty part changes.
after changing the sensor 5 times and changing all grips of wiring, i am not sure about the actual fault.
i believe, if there is torque sensor installed in steering, then we should not forget about steering performance. may be steering is getting more torque to move and sensor is indicating this issue and our so called engineers are just replacing the sensors as the money is not their headache!!!!!!.