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alekseymenkov

How To Learn Tps In Stock Ecu

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Hey guys,

I have a problem with my skyline R34 rb25det neo MT :(

I adjust TPS sensor to 0.5V (like in manual), but in consalt, flag "Closed TPS" is OFF.

How to learn TPS?

I hear, there is a way of 5 times turn a key to IGN, and back to OFF position.

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Duncan    719

I'm not certain for R34, but on R32 there is a separate throttle closed switch, it doesn't use the TPS output. in any case the stock ECU wouldn't be adjustable.

Have you tested at what voltage/adjustment the throttle switch closes?

BTW what are you trying to fix?

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alekseymenkov    0
  • Topic Author
  • I find a way to adjust the TPS!

    First, you need to calibrate base idle to 600 rpm.

    Next, you need to adjust the ignition timing to 15 degrees.

    At last, rotate TPS to 0.5V, like an manual, and do following:

    Key to IGN -> wait 5 sec -> Key to OFF -> wait 5 sec -> Key to IGN -> wait 5 sec -> Key to OFF -> wait 5 sec -> key to IGN -> check "TPS closed" flag in Consult. It will be ON!

    You need to do 5 turn of key, or more with 5 seconds waiting.

    Duncan, I want to calibrate all sensors to stock values (like in manual) :)

    Before, my TPS closed at 0.42V.

    f8de5e9409a54d5c914a7e5d266e4855.jpg

    Edited by alekseymenkov

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    ob1    1

    i know this is a thread revival, but i (think) i have the same issue i.e. i cant get my ecu to understand the correct voltage to turn on the "throttle closed" flag, which is causing very high idle.  Can anyone else comment on how this learning procedure is supposed to work?  Turning the ignition on and off 5 times did nothing for me.  Consult is reporting that the throttle closed flag is only coming on at around 0.2v, which is too low to be in spec.

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    ob1    1

    well i fixed it.  The 5 x on/off trick is what is necessary on a GTT to reset the ECU's threshold for "closed" throttle TPS voltage, HOWEVER, you must also meet the pre-requisite sensor conditions before starting.  For me, i had to wiggle my gear lever a little until the Neutral Indicator came on solid in NisDataScan, then the 5 x on/off worked.  My neutral switch must be on the way out.

    I have also read (but cant confirm) you have to:

    - be stationary (der!).

    - have the coolant temp above a certain temp.

    - have the battery voltage above a certain level.

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