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Bringing this thread back! So After reading it and doing my own research I bought a Toyota TPS pn#89452-14050. I just put it on the car and as soon as I plugged in the TPS readout on my microtech pings up to 99% and no amount of adjusting gets it down! you can get 0% I guess if it is adjust right back to nothing but as soon as the TPS moves 99%. So was this unit in fact not compatible with the 20B? it looks identical inside and out. spins the right way .. everything??
Anyone help please.
Can I have another Toyota part number that is straight bolt on and plug in if this is the wrong one please. it seems around the years being talked about in this post there are a number of different versions. Some rotate backwards, some the fingers are 90degs out etc. Would really like to know if I got the right unit but was sold a dudd or it is in fact the wrong unit?
Thank you
Lee
Preload? As in with slight pressure on the TPS mechanism. Pretty sure I did. Even of I hadn't would touching the throttle not have the same effect? Tps readout stayed at 99% no matter what? Is that Toyota number definitely good to go with? I winder if the pin out is different even though it looks like the exact same unit? Would like to verify before I return it as faulty in case it is just me being dim. I have had the 20b one off and on a few times and not had any issue dialing it back in. Other than the tendency for the readout to wonder over time or as the engine bay gets warmed up.
Cheers
Where and how do I check that please and what should I be expecting to see. Cannot find any pinouts o line that specifically state they are for this Toyota ups but other Toyota TPS. Look likes pinout is different for what I can find for the 20b.. *****. I don't really want to start chopping and changing wiring about in case I have to swap back to a proper 20b unit. Can anyone post a Toyota part number for a tps known to be plug and play on a Cosmo throttle body please.
thank you
What's in the microtech instructions? Pin out for a 20B? I meant I cannot find a pin out for the Toyota one to cross check it... That said I just looked at the microtech manual just now and that is different pinout to the picture I saw posted for a 20B TPS earlier! So how did you conclude I need to swap the ground (3 to 4) around? Have you found a pinout for the Toyota one. and would no ground net a 99% signal all the time? Could Is it possible to actually take the pin out of the TPS plug and put it back in a different position easily?If there I presume there will be no pin or wire in the 'not used' position. As such if by any wild chance one of my automotive plug terminals fits the TPS plug could I loop the ground to both spots so either TPS will work or does that 'not used' need to remain open. I didn't really want to start messing with plugs and wires but if I can easily enough swap the pin or add a ground I will give it a whirl. Cheers for info.
Hi Banzai, Can you give any advice for getting the female terminals out of the the TPS plug? Are the retaining tabs at the sides or top or bottom? Will I need a super thin blade or needle? If you have done it before it would just give me a bot f a head start if you can offer some advice! Cheers.
I really need to try this or sort a new TPS module. it is driving me mad.. Wonders all over the place at idle!
Okay.. Unless I am missing something my 20b TPS is wired wrong? If it is how on earth is it sort of working? My only issue with it is the slightly wo der I get with it. Appears earth might not be great as I cannot get continuity from the plug to the chassis? I assume I should be able to? See pictures below. You can see I have the following. Black/red wire goes to ECU blue. Looks like this has been swapped from the green/red wire at some point which is now spare/unused. Brown/black goes to ECU brown and brown white to ECU grey. Nothing like the diagram above? How is it working at all. Shall I move all to the right place and make sure I have ground continuity and see what happens? Worried I will fry something if I get power going to the wrong place?! Can someone also confirm pinout images ate looking at TPS sensor so from the back of the plug?
thanks.
Thought I would post my findings to close the matter. So first point to note is my odd wiring is correct. The 20B TPS diagram on the Microtech instructions is wrong! I am told there are two types of TPS used on 20B? So I found the other diagram and it all checked out. I then found my earth was bad which is probably the main cause of my problems but that remains to be seen. So after re-doing all the wire joints and figure how to get the pins out of the plug using an old hair clip I thought I would try my Toyota TPS wired as the microtech instructions showed. it kind of works! So in my microtech with a bit of preload on the installed TPS to zero out the TPS reading I have the adjustment set at about 22%. I plugged in the Toyota one off the throttle body and the readout shot to 50% I found I had to increase my adjustment value to 55% or around there to zero out the reading. Which to me seems a bit odd? It seemed to show a full range readout up to 99% when rotating around by hand. Just seems odd it has to be so far compensated in the ECU? I even tried the other unused wire just in case it was a narrow and wide band TPS signal or something? but that just didn't work at all. Just stuck at 50%?
Anyone got any thoughts or input.. Debating if I keep this TPS as a spare or not. Pending how my seems to hold up after a rewire!
Thought I would post my findings to close the matter. So first point to note is my odd wiring is correct. The 20B TPS diagram on the Microtech instructions is wrong! I am told there are two types of TPS used on 20B? So I found the other diagram and it all checked out. I then found my earth was bad which is probably the main cause of my problems but that remains to be seen. So after re-doing all the wire joints and figure how to get the pins out of the plug using an old hair clip I thought I would try my Toyota TPS wired as the microtech instructions showed. it kind of works! So in my microtech with a bit of preload on the installed TPS to zero out the TPS reading I have the adjustment set at about 22%. I plugged in the Toyota one off the throttle body and the readout shot to 50% I found I had to increase my adjustment value to 55% or around there to zero out the reading. Which to me seems a bit odd? It seemed to show a full range readout up to 99% when rotating around by hand. Just seems odd it has to be so far compensated in the ECU? I even tried the other unused wire just in case it was a narrow and wide band TPS signal or something? but that just didn't work at all. Just stuck at 50%?
Anyone got any thoughts or input.. Debating if I keep this TPS as a spare or not. Pending how my seems to hold up after a rewire!
The idle circuit on the Toyota is different then the 20B and 13 BRE. Because of this it is not an in range at idle. My 13 BRE won’t go into fuel cut and consequently shoots many flames.
Last edited by Barry Bordes; 10-11-20 at 03:53 PM.
Reason: Wordy
08-24-17, 02:32 PM
