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Old 10-21-2019, 04:50 PM   #1
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Allison MD3060 Throttle Position Sensor

Getting a d,21,23 code on the Allison trans of my 1993 American Eagle.

When I ohm out the TPS, I am getting just shy of 15,000 ohms across A-C, and on A-B, I am getting 5,000 ohms at rest, and 15,00 ohms at WOT with linkage connected. Disconnected, the at rest goes down to 2,000 ohms. Allison manual says this should be 500 ohms. Is this a bad TPS? Can it be cleaned/repaired or does it need to be replaced?

Any help is appreciated.

1993 American Eagle
Spartan MM/Cummins 6TA8.3
2015 Jeep Wrangler JKU toad
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Old 10-21-2019, 06:38 PM   #2
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I have successfully cleaned a TPS but ending up replacing it shortly after. The element wears out which caused the bad readings to begin with. And mine weren't as far off as yours seem to be. With the readings you're showing, I think it's time for a new TPS.

'02 Winnebago Journey DL, DSDP, 36' of fun.

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Old 10-21-2019, 11:04 PM   #3
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I agree, however the actual numbers are not quite as important as the uniform rise and fall of the numbers as the rheostat travels from one extreme to the other.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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