RB25 Neo TPS reset/relearn

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Stick
Posts: 34
Joined: Mon Apr 23, 2012 6:44 pm
Location: Brisbane

RB25 Neo TPS reset/relearn

Postby Stick » Tue Jul 17, 2018 9:45 pm

Hi all,

Anyone know how to reset the Neo TPS? Ive seached the interwebs and cannot find anything solid.

I can only set mine to 0.30v, anything over and it ups the revs to 2000rpm, adjusting the IACV does nothing. Also peaks at WOT at 3.63v. Obviously its out of nissan spec of 0.45 - 4.2v. Ive tried disconnecting the battery overnight, doing the key cycle 10 times thing.. nothing.

Anyone with any knowledge, please let me know!

Thanks

Matt
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Re: RB25 Neo TPS reset/relearn

Postby Matt » Wed Jul 18, 2018 6:46 am

Does the ECU see your 'start switch' input?

Stick
Posts: 34
Joined: Mon Apr 23, 2012 6:44 pm
Location: Brisbane

Re: RB25 Neo TPS reset/relearn

Postby Stick » Wed Jul 18, 2018 1:34 pm

No, it appears that it doesnt/

What is the "Start Switch" input related to?

Matt
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Re: RB25 Neo TPS reset/relearn

Postby Matt » Thu Jul 19, 2018 9:33 am

When you 'start' the car the signal goes from the 'start' switch to the ECU (which should light this indicator)

It makes the ECU look at the TPS to work out idle position, as well as use start fuel and timing maps etc

Stick
Posts: 34
Joined: Mon Apr 23, 2012 6:44 pm
Location: Brisbane

Re: RB25 Neo TPS reset/relearn

Postby Stick » Thu Jul 19, 2018 1:26 pm

The start switch being the key?

Would you know what pin on ECU it should go to on the neo?

And if it does see the "start switch", does that mean it zeros the TPS position as closed, so to speak?

Matt
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Re: RB25 Neo TPS reset/relearn

Postby Matt » Fri Jul 20, 2018 10:17 am

Yes. Please check NEO service manual

Stick
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Location: Brisbane

Re: RB25 Neo TPS reset/relearn

Postby Stick » Mon Jul 23, 2018 1:46 pm

What happens if i am seeing the "start signal" in the consult viewer?

Matt
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Re: RB25 Neo TPS reset/relearn

Postby Matt » Mon Jul 23, 2018 9:33 pm

I am not sure what the problem would be then. TPS learn uses start signal to perform learning

Stick
Posts: 34
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Location: Brisbane

Re: RB25 Neo TPS reset/relearn

Postby Stick » Wed Jul 25, 2018 9:40 pm

Hmm, confusing.

Thanks Matt

Stick
Posts: 34
Joined: Mon Apr 23, 2012 6:44 pm
Location: Brisbane

Re: RB25 Neo TPS reset/relearn

Postby Stick » Wed Oct 24, 2018 2:12 pm

Hi Matt,

Could the neutral switch not being connected be causing this problem? i have tried every possible scenario to get the TPS to reset, but no luck. Im thinking outside the box, and maybe ecu needs to see neutral to perform the learning.

Matt
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Re: RB25 Neo TPS reset/relearn

Postby Matt » Thu Oct 25, 2018 11:38 am

Potentially. Try wiring the line from the ECU to sensor ground and see if that helps


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