Polaris have a Electronic Throttle Control (ETC) system is designed to stop the engine of an ATV in the event of a stuck throttle mechanism. The ETC switch is mounted inside the throttle block assembly. the problem it has is when the throttle mechanism (cable tension is lost), the switch contacts close, grounding out CDI black wire to ground, which prevents ignition spark. This is the same as turning the key or engine stop switch "OFF". Check the throttle to make sure it only has no more than 1/8" of play in the thumb lever.
Also disconnect the black wire at the CDI module to isolate the ignition from the kill system. Check for spark.
The pulse coil output needs to be tested the best test is a peak voltage meter. the pulse coil has a red, black wires the peak voltage should be 3.3 Volts DC.
if you do not have a peak voltage meter you can check the Ohms reading. the pulse coil is 360 to 410 ohms. also the check black to ground and it should have no continuity
The exciter coil has a brown and yellow wires the peak voltage should be 34 Volts DC.
the exciter coil ohms reading is 5.4 to 7.3 ohms. also the check brown to ground should be 0 ohms resistance
the wires for the can be found at the Coil/CDI unit.
if any of the readings are out of specs the component is bad.