Post by
4xq »
https://forums.nicoclub.com/4xq-u207684.html
Fri Nov 14, 2014 12:46 pm
I have not done a swap with a jdm engine, so I probably cannot help with the actual wiring, but yep, you have to have the crankshaft position sensor hooked up and sending a signal to the ecm.
Here's a little blurb off another website:
Missing Crank Signal
If the crank sensor completely fails, the computer can no longer calculate engine speed. When this occurs, the ignition system and the fuel system shut down causing the engine to crank and not start or to stall if the engine is running.