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Testing the TPS
As a result of another thread involving a faulty throttle position sensor, a possible handy man method of reliable fault finding has come to mind, but experimentation is required.
As many will be aware the TPS comprises a potentiometer consisting off a conductive plastic resistive element around which traverses a wiping contact. Dirt on the surface can interrupt contact, as can a faulty element or inadequate pressure on the contact. It can be difficult to detect intermittent contact as the wiper is turned, due there being little time to register a measurement as the wiper passes over a faulty area. The response time of a typical ohmmeter or voltmeter is inadequate. A meter with a bar graph or an oscilloscope is required. The handyman does not normally have access to this sort of gear. Most will have been annoyed by audio gear which has a noisy volume control. Has the penny dropped ?????!!!!! Hook up the TPS with a capacitor of a few mfds in series with a torch cell and stick the output across the input of an audio amplifier. There are three connections to the TPS, which appears to used in a voltage divider configeration. Terminals 1 and 3, (4k 0hms) should be connected across the amp. input and 1 and 2 or 2 and 3, to the capacitor in series with the torch cell. Anything will do, guitar amp, walkman add on, whatever. In fact high impedance headphones should work. Turn the TPS and listen to the music ?! A nice rushing sound as the unit is turned will be good music. Nasty static will be bad news. This is simply an idea at this stage and requires experiment by a keen member who has a TPS on hand. I feel that the effort would be worthwhile. Any takers ?.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 04-24-2006 at 09:45 PM. Reason: Sentence added. |
#2
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I dont wanna
maybe someone other then me will do it. I just checked mine with the voltometer on ohms and slowly ran it up to5.0 from 0.0 or 1.0 (cant remember)anyways I think there is actually a write up of how to check the TPS in the how to somewhere. After I cleaned it it moved smoothly up and down, no jumping which might trick the TCU into thinking the gas was suddenly, and quickly moving, and turning on the power mode.
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1989 Subaru XT6 130k 1992 Subaru SVX 120k 1993 Ford Probe 30mpg 213k 1989 Subaru XT6 150k All good and running |
#3
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Quote:
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#4
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I still dont wanna so poo!
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1989 Subaru XT6 130k 1992 Subaru SVX 120k 1993 Ford Probe 30mpg 213k 1989 Subaru XT6 150k All good and running |
#5
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#6
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 04-28-2006 at 04:42 PM. Reason: Error |
#7
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torch cell = Flashlight Battery Would you suggest 1.5 volt, 6 volt, 12 volt? Do we need to be concerned about the voltage path, Positive vs. Negative? Dan |
#8
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cyber cyber cyber space hello hello
is is anyone one out there there? I may do it, but I am not in any hurry as I dont believe this is my problem but seeing as how I have an extra one I might do it when I get some free time. Are you happy now?
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1989 Subaru XT6 130k 1992 Subaru SVX 120k 1993 Ford Probe 30mpg 213k 1989 Subaru XT6 150k All good and running |
#9
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Why the nasty sarcasm ?
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
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Its only sarcastic if you read it that way. I was trying to be funny I guess I failed I should have posted one of these next time I will!
And I know you werent posting directly to me. even though the world does revolve around me. I know I know I was just throwing in my own personal information, as I knew that you would know what I was talking about. And I dont believe Poo is a cuss word. I believe you and I are from two different worlds trevor, or at least two different sides of the same one!
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1989 Subaru XT6 130k 1992 Subaru SVX 120k 1993 Ford Probe 30mpg 213k 1989 Subaru XT6 150k All good and running Last edited by spinn360; 04-30-2006 at 04:19 PM. |
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Although we are on different sides of the world, I am sure we are both within the same one. Not a problem, not to worry and all is well. Cheers, Trevor *<)
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#12
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Great alls well that ends well
If your all good, then I'm all good. Sorry for any mistaken communication. Cheers - shawn
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1989 Subaru XT6 130k 1992 Subaru SVX 120k 1993 Ford Probe 30mpg 213k 1989 Subaru XT6 150k All good and running |
#13
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A few good meters were out of my range when I went looking a couple weeks ago so this method sounds interesting.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
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