About all you can do without an oscilliscope is to check its not open circuit,(cant remember what the resistance value should be) then with it connected to a multimeter on a millivolt scale pass the tip of a screwdriver quickly back and forth across the tip of the sensor - you should get a reading.This is not really a definitive test - you need the scope for that,and seeing as it wont start at all Testbook is no help either.(Testbook will freeze / crash as you crank the engine).
Have to say the most common cause of non start on a TD5 is low fuel pressure,the crank sensor is very reliable.
