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When cranking, the trigger is not recognized
The output of the crank sensor is normal because it is recognized by the normal ECU.
I don't think it's recognized due to a logic problem with the LINK ECU.
I would like you to verify it once again.

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It would be better to attach the triggerscope file as it contains info about where the decoding is failing.  

But from your picture, I would say the most likely problem is the spike that you have in the middle of some teeth.  This looks like perhaps a wiring problem causing electrical noise getting into the trigger signal.  

Try another trigger scope with the ignition system/coil disconnected to see if that fixes the spike.  




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