hall effect switch

[letemlaf]

has anyone heard of a hall effect switch?

If so, i have a problem with my daily driven car, a holden calibra.

It will start fine, then for no reason the next time i go to start it just kicks over but nothing. Seems like im not getting a spark when it decides not to start.

I got into the ecu which says the hall effect switch is getting high voltage

[Bazelinez]

its a Calibra, that's the problem.

These have a pretty bad rep. Hall effect? never heard of it in mechanical terms... could be a bad igniter or simply your immobiliser playing up?

Sounds silly, but immobilisers sometimes cause more problems then you'd beleive.

Some immobilisers allow the car to turn over but not actually start, others stop everything.

[Ant]

Hall effect switch = a switch activated by a magnet, basically a chip version of a reed switch.

Not sure how the engine management in a Calibra works, but it could be something along the lines of the crank angle sensor (CAS) in a Skyline - the hall effect switch might detect rotation of the crank so that it know when to fire the injectors, spark plugs etc. If this isn't giving the correct signal the engine don't go!

Absolutely no idea where you'd find it though in a Calibra!

[letemlaf]

yeah its time to say goodbye i think.

I would like to fix the problem first so the new owner doesnt have the same problem.

If i can figure out why it has high voltage i will be able to fix the problem.

thanks guys!

[Ant]

yeah its time to say goodbye i think.

I would like to fix the problem first so the new owner doesnt have the same problem.

If i can figure out why it has high voltage i will be able to fix the problem.

thanks guys!

High voltage probably implies that its state isn't changing - ie the signal from it should pulse in response to the magnet attached to the crank or cam passing by it. At a guess either the sensor itself is dead, or the activating magnet is not working properly.

[letemlaf]

thanks Ant,

could that cause the car not to start?

[Ant]

Definitely - as far as the ECU is concerned the crank isn't turning (as it isn't getting a pulse from the sensor) therefore it won't fire the next plug and injector.