Yup, the first two docs show a vr cam sensor. They even show the waveform to remove any doubt. But all the Bosch cam sensors I've seen have been Hall, as mentioned in the last doc.
Can you just test it? Voltmeter, or ideally a scope, connected across the 2 pins of the sensor. Then wave a piece of steel past the sensor tip. If A voltage is generated iit's vr. If not, the sensor is a hall, or its broken.
Long time lurker, slow learner.
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Re: Long time lurker, slow learner.
Cheers, Brady
Audi 4kq MS1E,
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Audi 4kq MS1E,
Audi Quattro, 034 IIc
Audi 200qa20v
Audi 5ktqa
Datsun 240Z
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Re: Long time lurker, slow learner.
"A two wire Hall effect THEORY from another forum - has anyone heard of such a thing?"
I don't know about automotive ones, but they are certainly available for industrial applications.
I don't know about automotive ones, but they are certainly available for industrial applications.
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Re: Long time lurker, slow learner.
A two wire Hall effect sensor would most likely be using the body as the third (ground) wire.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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Re: Long time lurker, slow learner.
No, they don't use the case as a "third wire", they are true 2-wire. Kind of like a current-loop system. I'll look for info, I think Allegro makes some chips and Turck the assemblies.
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Re: Long time lurker, slow learner.
The Allegro A1244 is a 2-wire Hall device. (Note that it has three leads, but one is "NC")