Anyone scoped the wheel speed sensor for speedometer on MY99 classic?
10 May 2010, 03:52 PM
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Anyone scoped the wheel speed sensor for speedometer on MY99 classic?
Hi all 
Has anyone scoped the VSS feed into the instrument cluster on a MY99 vehicle? Eg the line which you cut to put a kph>mph converter into.
I'm curious to know what the signal is, eg pattern, peaks, frequency and/or duty-cycle..
Any info greatly appreciated..
Cheers
Has anyone scoped the VSS feed into the instrument cluster on a MY99 vehicle? Eg the line which you cut to put a kph>mph converter into.
I'm curious to know what the signal is, eg pattern, peaks, frequency and/or duty-cycle..
Any info greatly appreciated..
Cheers
12 May 2010, 07:31 PM
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no, but i would imagine its a short pulse ie logic 1 as the speed sensor is a proximity sensor (hall effect), located in the gearbox looking at some kind of flag, maybe off the final drive.
12 May 2010, 07:35 PM
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Right, wasn't sure if it was inductive or hall effect. That simplifies things somewhat! I'll have a play with the func gen on a spare set of clocks i've got here. Thanks for your help.
12 May 2010, 08:17 PM
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Just done a bit of revision and it should be a uniform square wave - hall effect into wikipedia ..
Why do you want to know this ?
There is a chip you can buy to solder behind clocks to convert kph to mph you know ?
Why do you want to know this ?
There is a chip you can buy to solder behind clocks to convert kph to mph you know ?
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