ExactlySo, if I have this right, between your comments and what I have read about Zener diodes, this is how the non HISS immobilizer works:
For a normative key start, as in not being hot wired:
There is a parallel feed to the ICU that is looking for reduced voltage as exists after the Zener Diode that is below the lock core.
The feed into the ECU is by the Pink wire.
If the bike is being hotwired, there won't be that reduced voltage input into the ECU, which then executes internally to prevent the bike from being able to turned over, fuel to be pumped, or ignition to occur.
Comments please, from anyone that has any.
I'm assuming the 3.6v portion of the rating is how much voltage reduction it provides.So I bought a multipack with like 300 for 10$ on Amazon in 30 different voltages. I used a 3.6v 1w zener diode
Yea whatever the voltage rating of the diode is what will be cut off of your battery voltage. Also it is worth noting that they are directional. So there's a black line on one side to indicate anode or cathode (I'm not sure which is which off the top of my head but if one way doesn't work flip it.) The battery voltage is oddly only reduced if it goes the right directionI'm assuming the 3.6v portion of the rating is how much voltage reduction it provides.