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Old 07-14-2012, 10:32 AM   #1
Mosting3
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Default STI JDM Version 7 swap, Inverted NPS for a working AVCS?

Hello,
A Question:
I have a full Version 7 JDM STI swap (ECU, Harness, Engine, Transmission).
to let the AVCS work, i have heard that we need to invert the Neutral switch.
my current readings:
value = 1 @ neutral
Value = 0 @ gear
Is this right? read subaru fixed the issue on Ver.9,, can't really know.
Isn't inverting the NPS is right when having US transmission with JDM Engine?!
Thanks in advance.
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Old 07-14-2012, 11:07 AM   #2
tintnsound
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Version 7 will work with USDM 2004 STI 6mt NSS. They reversed in 2005/6 STI
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Old 07-14-2012, 11:10 AM   #3
tintnsound
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2004 STI NSS is closed in gear - ground. Part number. 32008AA091

2005 STI and up is closed in neutral part number 32008AA160
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Old 07-14-2012, 11:32 AM   #4
fastnoypi
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if you have the matching ecu and transmission you should be all set if the NSS is intact. Just add the AVCS wires.
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Old 07-14-2012, 02:10 PM   #5
Mosting3
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I think you misunderstood me, what am saying is that i have the Ver.7 JDM Transmission!so no need to install USDM one.
To let the AVCS work properly, shall i invert the functionality of the neutral switch?
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Old 07-14-2012, 08:32 PM   #6
tintnsound
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As long as you have the V7 ECM to match the V7 trans you will be fine. Double check the ECM and transmission part numbers. When I bought my V8 drivetrain they mistakenly gave me a V7 ECM So I had to change my NSS. If you have to change the NSS the part numbers above are the USDM part numbers that will work with the JDM trans.
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Old 07-14-2012, 08:39 PM   #7
Fierysun
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Let's say I have a EJ207 v9 (and ecu) mated to a 05 USDM 6MT. Will i still need to change the NSS?
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Old 07-14-2012, 09:33 PM   #8
lukeskywrx
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What MAF? -Speed Density!

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Quote:
Originally Posted by Fierysun View Post
Let's say I have a EJ207 v9 (and ecu) mated to a 05 USDM 6MT. Will i still need to change the NSS?
No you should not they are both set as inverted, I have this combo.
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Old 07-15-2012, 04:28 AM   #9
Mosting3
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Quote:
Originally Posted by tintnsound View Post
As long as you have the V7 ECM to match the V7 trans you will be fine. Double check the ECM and transmission part numbers. When I bought my V8 drivetrain they mistakenly gave me a V7 ECM So I had to change my NSS. If you have to change the NSS the part numbers above are the USDM part numbers that will work with the JDM trans.
I think i might have this issue, my engine is EJ207DW4, which is 2002 Ver.7 and the ECU is 03 JDM STI, but i couldn't check the Transmission.
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Old 07-15-2012, 11:32 AM   #10
tintnsound
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Quote:
Originally Posted by Mosting3 View Post
I think i might have this issue, my engine is EJ207DW4, which is 2002 Ver.7 and the ECU is 03 JDM STI, but i couldn't check the Transmission.
I would physically check the NSS with a multimeter. If your drivetrain is already in the car, The NSS is on the top of the trans about 3/4 of the way back towards the shifter. The harness runs down the drivers side of the transmission, it is a two pin plug (I think it's white). If you have the right NSS it will be closed in gear and open in neutral. Hopefully you have the right one. It is a real PIA to change it,, but it can be done without completely removing the trans.
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Old 07-15-2012, 11:36 AM   #11
tintnsound
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2005 for both JDM and USDM seems to be the year the NSS inverted. I don't know for sure on the JDM 6mt maybe someone else could chime in on this.
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Old 07-15-2012, 08:23 PM   #12
lukeskywrx
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What MAF? -Speed Density!

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Quote:
Originally Posted by tintnsound View Post
2005 for both JDM and USDM seems to be the year the NSS inverted. I don't know for sure on the JDM 6mt maybe someone else could chime in on this.
There is a little fuzziness as to when they switch things in Japan, seems to be a half a year earlier than in the US and sometimes happens at the end of the prior production year.

I am happy that I can just select the proper signal in the rom, just one checkbox.
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Old 07-21-2012, 08:48 PM   #13
Mr.Bug_02
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ok i have a similar question, i have a 2002 WRX with a v9 swap, i did wire the AVCS harness and i am running the 2003 v8 ecm... is my stock wrx 5 speed NSS correct? im using RomRaider when i'm in neutral it says 6 when in gear it says 1, but i noticed when logging if i'm in 2nd it says 3rd but then switches to 2nd when at WOT... this is bugging me to much
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Old 07-22-2012, 12:16 AM   #14
lukeskywrx
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What MAF? -Speed Density!

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Copy your gear determination ratios over from your 5-speed WRX rom and put them into this table on the JDM rom
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Old 07-22-2012, 02:25 AM   #15
Mosting3
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Yeserday i have check my NPS logging using romraider logger, when doing WOT, i have noticed there is a chance that Neutral Position Switch = 1 while am on gear and therefor the AVCS wasn't working!
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Old 07-23-2012, 12:47 PM   #16
Mr.Bug_02
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Quote:
Originally Posted by Mosting3 View Post
Yeserday i have check my NPS logging using romraider logger, when doing WOT, i have noticed there is a chance that Neutral Position Switch = 1 while am on gear and therefor the AVCS wasn't working!
i believe this is happening to me as well, mu car does not seem to pick up as well as everyone has told me it should
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