one of my k11,s had a bent ecu pin or something, because it lost the crank signal if the ecu plug was pushed fully in square, and i had to tilt the plug a bit crooked
you need this type of obd lead
https://www.micra.org.uk/threads/tost-the-official-spam-thread.53370/page-63#post-651217
and its easy to confuse the smaller dizzy plug with one of the coolant temp sensor plugs