Hall effect sensor diagnosis

[Cap'n Carageous]

What symptoms does a bad sensor have? Can it affect normal driving above 1.4Khr?

Originally posted by Cap'n Carageous
[B Can it affect normal driving above 1.4Khr? [/B]

1.4 thousand hour? wuzt this?

[kerry]

I've installed a couple of Pertronix hall effect electronic ignitions on older point systems. I am under (the possibly mistaken impression) that when they fail, it is complete failure and the vehicle won't run. I would like clarification on failure modes if I am wrong.

[tecqboy]

A Hall effect device is just a solid state switch. It is essentially a transistor which conducts (On) in the presence of a strong magnetic field. So, like any silicon device, it generally fails completely, if it fails at all. But, intermittent operation might occur is the magnetic field is marginally not strong enough to completely saturate the switch. The field strength is controlled by the distance between the magnet and the switch. So, if possible, move the device and the magnet closer together. Tod

[95300YDT-A]

Cap'n Carageous,

What car are we talking about ?
On my 1990 W124 TD turbo the Hall sensor serves only to transmit the speed of the car ( read on top of the speedocable right behind the instrument cluster ) to the Tempomat cruise control. So if your Tempomat is not working correctly...you know where to start !
Depending of the age of the car, the outboard temperature reading is also coupled to the Hall sensor so it will not indicate a wrong temp when you are not driving .
If you don't have one ore both of these items there will be no Hall sensor because ther is no need of it !

Danny