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#1
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tps voltage
I bought the subaru rx from rebecca and was curious as to the tps voltage was the same as the svx .5 volts ? the rx was sick and needed the coolant temp sensor replaced and was informed that the tps was out of range so was wondering if the voltage was the same so i can reset it.
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William |
#3
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When you said TPS voltage
Did you mean TPS reports?
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#4
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yes it is its universal with all most every car... should be between .45-.55 .5 optimum
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- John ASE certified Master Tech W/ X1 Twin City Fleet repair, St. Paul, MN need work done? Have tools will travel
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#5
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I have recently set the TPS all the way one way in the slots. The ECU compensates for it, no problem. The learning circuit in the ECU does the compensation.
The TPS is prone to wear if you drive a lot with your gas foot in the same place each time. This wears a spot in the TPS resistor contacts. Not good for the TCU since it depends on the TPS reading. I say about 130K miles of highway driven wear them out. Moving it all the way in the slots has it work on a spot that is not worn at all. In normal driving the TPS hardly moves at all so it is pretty easy to put a wear spot in it. There is other setting information on this site that says to use 2.0 volts for setting and that depends on what two pins out of the three you connect to. If it's bad I will move the position and try that first as that little TPS is costly. I have also had some strange problems on a 1.8 Impreza where the TPS was bad. No CEL or other indicators. The TPS on the 1.8 impreza and SVX look the same. Take care of that SVX John
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#6
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Quote:
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- John ASE certified Master Tech W/ X1 Twin City Fleet repair, St. Paul, MN need work done? Have tools will travel
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#7
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If the TPS is worn to the point whereby contact, or the conductive plastic resistance element is faulty, there will be any error in the signal regardless of how you set it the adjustment. This "learning stuff" is confusing and can not be applied in this instance. In point of fact by setting the unit incorrectly, you will have compounded two errors.
Please quote the reference you have found published referring to 2.0 volts.
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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! |
#8
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thank you for all the info. YES the little square tps is $322 so if it can be reset and/ or cleaned this was my hope. I was unaware that it could be moved and the computer would learn it.
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William |
#9
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Quote:
Before you do anything, go here and read all about it. http://www.subaru-svx.net/photos/files/How-To/14293.pdf
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 02-20-2008 at 01:28 AM. |
#10
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Oh yes I agree this is not what is considered correct and took a long time for me to try this and guess what? Well all I can tell you is that it is working just fine!! No effect on the MPG either.
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#11
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Quote:
I may have that 2.0 volts wrong but I will look around. Don't forget there are three wires and they do not read the same.
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#12
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Quote:
This last time I turned it all the way with the engine off. So gues what? No change in idle speed, no CEL, no change in MPG and the tranmission is shifting better since it's off the wear spot.
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#13
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The TPS is prone to wearing out. Periodic cleaning BEFORE it wears is a better way to keep it lubricated and not wear. Just like that speed sensor in the tranny. Take care of that SVX, John
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#14
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Quote:
A change in the controlled medium is sensed, the result measured to be fed back to the adjusting mechanism. A change is signalled and the result again measured and fed back. The process continues until equilibrium is reached and medium stabilised at the desired parameter. I guess this system of feed back and response, can be likened to learning, in a vague sort of manner. The idle speed is determined by the ECU on the basis of sensing engine RPM and correcting other parameters in order to adjust same. The ECU has learned nothing, it is simply operating normally and made an adjustment to counter a changed input. It has reacted in the same way as it does in countering a change in other factors. After the alteration suggested, the overall signal voltage from the ECU has been altered from optimum and regardless of placebo, and functions relating to the TPS will have been altered.
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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$hit! Last edited by Trevor; 02-20-2008 at 04:39 PM. Reason: Addition |
#15
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Quote:
Lubrication as such should not be attempted. The electrical surfaces should not be contaminated with oil, as this comprises an insulation against electricity. An electrical cleaning agent must be used. Once clean, the surface of conductive plastic is inherently friction free. Any debris will prevent proper contact with the conductive plastic surfaces, thus upsetting the resistance at specific points during rotation. Whatever, there can be general wear and tear effecting optimum performance, which will require replacement at some point.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
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