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Discussion Starter #1 (Edited)
This guide is to be able to allow the 99 P11 guys who have bought and chipped a Nistune 94-97 B14 ECU or plan to in the future also applies to 98-99 B14 guys.

This is going to be an on going guide but i'll start it off with a picture with instructions.

Decided to re-host these since im working on a P11 right now and having to go over these things once again so enjoy, damn photobucket killed the game

To try and sum it up here's what you gotta do for running a P10 ECU

Move pin 28 (AIT sensor) P11 harness to pin 63 position for P10/B14 ECU and eliminate the EVAP wire (Green/Red) cap it off not used anymore

Move pin 110 (RHO2 sensor HEATER) p11 harness to pin 108 position for P10/B14 ECU and eliminate EVAP wire (Purple/white) cap it off not used anymore

Splice into pin 118 (ECM Ground) P11 harness to pin 111 position for P10/B14 to become RHO2 Sensor Ground

Swap your 99 P11 lowport throttle body for a P10/B14 Highport throttle body and sensor (no you cannot just swap sensors)

They are physically different where the sensors attach to the throttle body and the sensors are electrically different











 

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Discussion Starter #3 (Edited)
From the excel chart I made below you can deduce what pins you can eliminate and/rearrange from your engine harness if you have a 1999 P11 and use an earlier OBDII P10,B14 ECU for purpuses of tunning i.e. sending your ECU out to get nistuned or whatever, I think you will find this helpful.

 

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I love this thread.
 

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Rare Wheels Save Lives
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Charlie, I just wanted to confirm that position 15 on your current diagram is correct. I have one of your old diagrams that compared the 94-96 P10 to the 99 P11 pinouts and the position on the A/C relay is 15 for both P10 and P11 vs the one above where P10 is at 16 and P11 is at 15.
 

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Discussion Starter #12
Charlie, I just wanted to confirm that position 15 on your current diagram is correct. I have one of your old diagrams that compared the 94-96 P10 to the 99 P11 pinouts and the position on the A/C relay is 15 for both P10 and P11 vs the one above where P10 is at 16 and P11 is at 15.
Yea, these ones are correct now because I personally took these pinouts and colors from the actual cars and not just from online sources which can be incorrect as some of them are, so I confirmed all of these before I posted this up but that is not to say im perfect but.....im 99.9% sure you will find no mistakes.

The 94-97 B14 and 94-96 P10 wire colors are from M/T vehicles hence why the so many empty spaces.

The 99 P11 wire color and pins are from my own personal car which has an automatic harness, hence why you see some automatic pins on there but I went ahead and greyed them out because you wont need to use those if you use a M/T ECU.
 

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Discussion Starter #13 (Edited)
One Mistake of the title row 2 (B14 94-97 ECU) pin 45 should read (position signal) not reference signal.

Other than that I can confirm that this pinout works perfect when followed 100% when using a B14 ECU.

Its important that you disable sensors not used especially the MAP sensor as this will draw down power feed to TPS for some reason and you wont see over 4v at WOT so do that.
 

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Discussion Starter #14 (Edited)
P10 ECU USER'S

A quick guide on what to re-pin on your 1999 P11 harness to work with a P10 ECU, (also de-pin anything not being used which isn't covered below but use the guide up top to easily figure that out).

remove pin 9 from p11 harness and tape off

move pin 28 of p11 harness to pin 63 and tape off pin 28

move pin 110 of p11 harness to pin 108 and tape off pin 108

Splice into pin 118 of p11 harness to add a ground to pin 111
 

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P10 ECU USER'S

A quick guide on what to re-pin on your 1999 P11 harness to work with a P10 ECU, (also de-pin anything not being used which isn't covered below but use the guide up top to easily figure that out).

remove pin 9 from p11 harness and tape off

move pin 16 of p11 harness to pin 15

move pin 28 of p11 harness to pin 63 and tape off pin 28

move pin 110 of p11 harness to pin 108 and tape off pin 108

move pin 118 of p11 harness to pin 111
is this for a 93-93.5 or 94-96 p10 ecu? or does it matter?
 

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'Luke'
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Damn this is GOOD info !
 
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