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Question about Wiring Connection in Camshaft Position Sensor Repair

TiboPit 14718 10
Best answers LABEL_AI_GENERATED

What is the third wire on a camshaft position sensor, and where should it be connected after repair?

The third wire is ground/screen, tied to mass rather than to a signal pin [#16248571][#16249356] One reply noted that the original connection was likely made with conductive epoxy, not a normal soldered joint [#16248621] The sensor in question was identified as a BMW M50B20 part, and another reply warned that because of engine vibration a repaired connection may not hold up well [#16249525][#16248694] It was also pointed out that this does not look like a Hall sensor; it is described as having two coil outputs with the third wire as the cable shield connected to ground [#16249356] A replacement sensor was recommended over a repair for reliability [#16248694]
AI summary based on the discussion. May contain errors.
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  • #1 16248527
    TiboPit
    Level 7  
    Posts: 27
    Rate: 11
    The camshaft position sensor fell on me. Out of curiosity, I undressed. The wiring of the wires to the sensor was damaged. As far as I know where to sell yellow and black, I have doubts about the third wire. I suspect that it has to be tangent with the permanent magnet of the sensor. There are blue spots on it, like glue that was supposed to hold the cord. After plastic housing somehow I do not see another option, but I would rather make sure. Can anyone say anything?
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  • #2 16248571
    zibi581
    Level 22  
    Posts: 449
    Help: 36
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    The third wire is mass.
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  • #3 16248581
    TiboPit
    Level 7  
    Posts: 27
    Rate: 11
    Exactly ..., when soldering to the magnet it comes in to mass ... It's connected to the sensor housing by the magnet ... So I understand that I thought well ... I wonder why it was not soldered ... Tin with flux elegantly entered on magnet
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  • #4 16248621
    zibi581
    Level 22  
    Posts: 449
    Help: 36
    Rate: 174
    The fact that the tin has entered does not mean that it is the right combination, that's why it was glued with an epoxy conductive adhesive.
  • #5 16248674
    TiboPit
    Level 7  
    Posts: 27
    Rate: 11
    The meter comes out ok ... I wonder if it will work ...
  • #6 16248694
    zibi581
    Level 22  
    Posts: 449
    Help: 36
    Rate: 174
    Will it not be better if you buy a new one, there are big vibrations in operation, it may not last, and in the end it is some kind of papranina.
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  • #7 16248752
    TiboPit
    Level 7  
    Posts: 27
    Rate: 11
    It's just out of pure curiosity ... It will definitely be a new one. Thanks for confirming. Such a hall sensor could break inside?
  • #8 16248812
    ociz
    VIP Meritorious for electroda.pl  
    Posts: 15844
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    What car is it from? He does not look like a hall at all.
  • #9 16249356
    carrot
    Moderator of Cars  
    Posts: 8501
    Help: 1315
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    This is not an inductive hall sensor, it has 2 coil outputs, 3 is a cable screen connected to the ground
  • #10 16249525
    TiboPit
    Level 7  
    Posts: 27
    Rate: 11
    BMW, engine M50B20
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around the wiring connection of a camshaft position sensor after it was damaged. The user inquires about the function of a third wire, suspecting it connects to the sensor's permanent magnet. Responses clarify that the third wire serves as a ground connection, and there are concerns about the reliability of soldering versus using conductive adhesive. The user expresses curiosity about the sensor's functionality and mentions the specific vehicle model, a BMW with an M50B20 engine. Additional insights indicate that the sensor is not a Hall effect type but rather has coil outputs, with the third wire acting as a cable screen connected to ground.
AI summary based on the discussion. May contain errors.
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