TPS reading is backwards
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From: Earth
TPS reading is backwards
Ok so long story short my tps sensor is reading backwards. 4.5 volts closed .5 open. I read that this means that the green and yellow wires are backwards, so I switched them around and it’s still doing the same exact thing? How is this even possible? I replaced the tps sensor and it’s doing the same thing. I did l take out the engine harness and removed unnecessary wiring/ covered everything in expandable sleeving but I don’t see how that could be related.
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From: Earth
Re: TPS reading is backwards
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From: Flyover Country West Annex
Re: TPS reading is backwards
You depinnned both the yellow/white and green/white and switched their physical location in the plug, and nothing changed? Because that makes, well, absolutely no sense. Reversing the wires should reverse the behavior, and if there's a short somewhere then you shouldn't see the appropriate range at all.
If you're asking for a pin-for-pin trace of every wire in the harness, there isn't one. The are diagrams to be found in about 30 seconds on google, but you're going to have to match wire colors and probably think in 3 dimensions.
And just for giggles, it would be good to know what chassis, engine, and modifications are in play here- is it actually a stock 1990 EX or something else?
If you're asking for a pin-for-pin trace of every wire in the harness, there isn't one. The are diagrams to be found in about 30 seconds on google, but you're going to have to match wire colors and probably think in 3 dimensions.
And just for giggles, it would be good to know what chassis, engine, and modifications are in play here- is it actually a stock 1990 EX or something else?
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Joined: Sep 2002
Posts: 5,647
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From: colorado springs, co, usa
Re: TPS reading is backwards
do the wire colors match on both sides of the connection? sounds to me like you may have the MAP sensor connector plugged into the TPS
TPS colors - Yellow/White stripe, Green/White stripe, Red/Blue stripe
MAP colors - Yellow/Red stripe, Green/White stripe, White/No Stripe
TPS wires at ECU - Yellow/White - C13, Green/White - C12, Red/Blue - C7
Are you checking voltage between Red/Blue and Green/White?
TPS colors - Yellow/White stripe, Green/White stripe, Red/Blue stripe
MAP colors - Yellow/Red stripe, Green/White stripe, White/No Stripe
TPS wires at ECU - Yellow/White - C13, Green/White - C12, Red/Blue - C7
Are you checking voltage between Red/Blue and Green/White?
Thread Starter
Honda-Tech Member
Joined: Sep 2017
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From: Earth
Re: TPS reading is backwards
You depinnned both the yellow/white and green/white and switched their physical location in the plug, and nothing changed? Because that makes, well, absolutely no sense. Reversing the wires should reverse the behavior, and if there's a short somewhere then you shouldn't see the appropriate range at all.
If you're asking for a pin-for-pin trace of every wire in the harness, there isn't one. The are diagrams to be found in about 30 seconds on google, but you're going to have to match wire colors and probably think in 3 dimensions.
And just for giggles, it would be good to know what chassis, engine, and modifications are in play here- is it actually a stock 1990 EX or something else?
If you're asking for a pin-for-pin trace of every wire in the harness, there isn't one. The are diagrams to be found in about 30 seconds on google, but you're going to have to match wire colors and probably think in 3 dimensions.
And just for giggles, it would be good to know what chassis, engine, and modifications are in play here- is it actually a stock 1990 EX or something else?
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From: Earth
Re: TPS reading is backwards
The tps is definitely connected, like I mentioned it’s getting all the right voltages from every wire. I just don’t know if I’m checking the codes correctly. The original ecu has a light on it for checking codes, but with the mini me swap and a p28 ecu shouldn’t the cel flash? Or am I missing something?
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Joined: Feb 2019
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From: NC
Re: TPS reading is backwards
If you are jumping the service connector and get a solid CEL, then there is an issue with the ROM. So if your P28 is chipped, there could be an issue with the chip, the file on the chip, or some issue with the chip kit install. If its a stock ECU, then it's probably bad.
Thread Starter
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From: Earth
Re: TPS reading is backwards
If you are jumping the service connector and get a solid CEL, then there is an issue with the ROM. So if your P28 is chipped, there could be an issue with the chip, the file on the chip, or some issue with the chip kit install. If its a stock ECU, then it's probably bad.
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