Nistune Forums

Hey Matt I learnrd some things about the following platforms that should have perhaps some attention brought to them:

1994-1997 B14 SR20DE
These ECU's join both pin 41 and 45 as the "Camshaft Posistion Sensors (Posistion Signal)".




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1994-1996 P10 SR20DE ECU
1998-1999 B14 SR20DE ECU
1999 P11 SR20DE ECU
These ECU's only have pin 41 as "Camshaft Posistion Sensor (Posistion Signal)".




So the issue is anyone using a 1994-1997 B14 ECU on the following platforms is going to run into a wiring issue because these cars lack the extra wiring in there harness for the extra Camshaft Posistion Sensors (Posistion Signal) required for a B14 ECU.
1994-1996 P10
1998-1999 B14
1999 P11

Now I know this thread is old and I remember asking you if it is possible for you to do my 99 ECU a while back and the answer was no not yet, perhaps was this an issue when you bench test these ECU's?

I know that using a 94-97 B14 ECU on a 99 P11 and 98-99 B14 has a miss at idle and just doesnt feel right however though the car is drivable but you can tell somehting isn't right.

Just some food for though, there is many more differences to I can share in my findings with regaurd to wiring but im not expert in electronics but somehting tells me the electrical architecture on the 94-97 B14 ECU is different than the 94-96 P10, 99 P11 and 98-99 B14.

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.

This is the pinout of a 99 P11 ECU (probably the most complete correct pinout you'll find on teh web period).



Heres is a 1994-1997 B14 ECU pinout:






There is plenty more to come.

Hey Matt I discovered a few things using different address file on my 1999 USDM P11 SR20DE BIN file.

Using a WP11 SR20VE ADR on a 1999 USDM P11 SR20DE BIN









Using a ER34 RB25DET ADR on a 1999 USDM P11 SR20DE BIN






Some of these look like they could be legitiment dont know if you could go through I check/ verify them.

Hey Matt think I stumbled accross something I dont know if this is new or old but please have a look at it, maybe this will help with the P11 ECU I dont know, look all japanese to me lol



http://www.sergey89.ru/files/Nissan/P10%20&%20P11/ECU/

Hey Matt think I stumbled accross something I dont know if this is new or old but please have a look at it, maybe this will help with the P11 ECU I dont know, look all japanese to me lol

Its the schematics for a ROM type daughterboard for these models. They use address/data multiplexing via the ALE line