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VStar650CL »
https://forums.nicoclub.com/vstar650cl-u299034.html
Sat Oct 16, 2021 5:29 am
Three wire sensors (Hall Effect types) produce square waves at either a 5V or 12V rail voltage (most late model N/I engines use 5V). N/I engines generally have a 32-minus-4 format on the crankshaft where there are two packets of 16 teeth with two 2-tooth index gaps for each revolution of the crank. Because of the index gaps and the mechanical asymmetry of the teeth, it's difficult to tell anything meaningful from a multimeter. You'll usually get something that's a bit less than half the sensor's rail voltage, but that will only tell you the sensor isn't stone dead. It won't clue you to a sensor that's missing teeth. You really need a scope to see what's going on when a CKP or CMP sensor is misbehaving but not dead.