I'm kind of just a backyard variety wrench, but...
The resistance on the angle sensor pins for the yel/blu and grn/blu should vary smoothly as the angle sensor turns (4k-6k).
You can also do some checking on the wiring with an ohm meter. There should not be continuity between the blu/grn pin on the wiring harness and ground, or from the yel/blu pin and ground.
With the angle sensor plug off and the key on, you should have 4.7 to 5.3 volts on the blk/red wire.
Otherwise I think I'd have just replaced the angle sensor and see if that is the cure.
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