if you put it on to ohms like a headphone shape symbol
follow the wire for the crank position sensor iirc it comes up near the rad there should be a conector that the wire comes into a 2 pin one
seperate the conector and put the test meter on the 2 pins thats going to the cps
then get some1 to turn over the car and you watch the meter see if it moves
see if you get a reading
basicly you have to work from 1st bit to last bit
why did you change the ecu?