Tps Values

[Ramigojag 19 1 Cars]

I know this has been covered in stickies I've read them and that's how I knew what to do in the first place.

 

I took my TPS off the car probed pin 18 and 2 and get a constant infinite ohms reading no matter where I move the spindle to, which makes me think the idle contact position is broken.

 

Prob pins 18 and 3 and I get infinite at one end and as I turn the spindle it moves over to about 0.06 thereabouts.

 

I ordered a 2nd hand replacement from 205nuts on eBay which I thought were quite reputable. Probed it tonight and it does exactly the same as my old one. So before I return it I wanted to confirm that I'm testing it right and those values im seeing are those of a failed TPS.

 

According to here and the Haynes I'm right nut would like clarification

 

Thanks

[welshpug 1,661]

well, I'll just be repeating what haynes and other posts on here have said

 

for the idle switch its easier to test with the switch still fitted so the return spring closes the microswitch, WOT is just a contact.

[Ramigojag 19 1 Cars]

I'll try fitting it again to test the idle switch then

[jackherer 543]

You can hear the idle switch click when it operates so if you're not seeing a circuit between any of the pins that comes and goes when you click it you have a broken switch.

[Ramigojag 19 1 Cars]

I can hear it click when it's fitted but I took it off to test it because my multimeter is abit awkward and it was a pain to test in situ. I get a change in the reading at the WOT contact but none for the idle.

 

As welshpug said I'll try it fitted didn't get chance tonight, too busy stripping down the power steering pump on the girlfriends mini

[Anthony 1,003]

Easiest way to test is using the audible continuity/diode test function on the multimeter if it has one.

 

Two of the pins should make a circuit with the throttle closed and the switch "clicked" and two pins should make a circuit as the throttle nears wide open (no click on this). Between these two, all the pins will be open circuit.

 

Don't confuse the throttle switch fitted to 8v's and 1.9 Mi16's with a proper potentiometer TPS as found on most fuel injection engines - the later changes resistance as you open the throttle and you would test using the resistance/ohms feature on the multimeter.

[Ramigojag 19 1 Cars]

Easiest way to test is using the audible continuity/diode test function on the multimeter if it has one.

 

Two of the pins should make a circuit with the throttle closed and the switch "clicked" and two pins should make a circuit as the throttle nears wide open (no click on this). Between these two, all the pins will be open circuit.

 

Don't confuse the throttle switch fitted to 8v's and 1.9 Mi16's with a proper potentiometer TPS as found on most fuel injection engines - the later changes resistance as you open the throttle and you would test using the resistance/ohms feature on the multimeter.

I understand that, but mine and the replacement one I got both just constantly read infinite Ohms or open circuit.