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There are seemingly three fixed resistors - call them Ra, Rb, Rc inside the TPS... These are in simple series between pins 1 & 2 - thats why that value doesn't change. The variable resistor exists between pin 3 of the TPS and the point between Rb and Rc.
I've quickly tried to do some simultaneous equations and solve for the internal values, but my brain is fried tonight. If anyone else wants a go - work away...
Resistance across 2&3 in idle position is 0.75-1.3 kohm which then increases to approx 3.6kohm at full throttle.
Looking at the small print in the manual - it actually says the MAXIMUM should be 3.6kohm so my prior post was a bit misleading there. Sorry 'bout that.
Looking at the small print in the manual - it actually says the MAXIMUM should be 3.6kohm so my prior post was a bit misleading there. Sorry 'bout that.
Paul
Mine only goes to 2650 ohms at WOT and 4.6 v
I have tried adjusting the position but can not get any more out of it .
Do you think this could be the problem with vag com not getting WOT code ?
The other thing that makes me think the throttle pot is dead is that I get 10100 code just as I come off idle just for a slit second when the throttle is only open I tiny bit.
But no matter how slow I move the throttle with a multimeter on it I don't get any resistance or voltage jumps, I even got a analogue multimeter so I new I was not missing anything with the sample rate of my cheep DMM and still nothing.
Is there anything else that you know of that could be making the ecu not give the WOT code in vag com ?
You are welcome to try my spare TPS if you wish to compare it on your car. If it turns out to be root cause, then just send it back when you get a new one.
You are welcome to try my spare TPS if you wish to compare it on your car. If it turns out to be root cause, then just send it back when you get a new one.
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