Which Ecu Do I Have?

[rondofj]

Hi fellas,

I am goin to do a Nistune soon to my R34GT-T, upon opening the ECU cover this morning, I found that it has JECS written on the ECU, so I am wondering is that a Stagea one or what?? Please see pics.

Does the ECU look tinkered (dunno what previous owner did) or stock??

thanks,

Ron

[The Dan]

Unisia Jecs is the company that makes most of the electronic parts for your car.

Looks factory but someone has added something to it at some stage....possibly a SAFC or a Rev/Speed meter os something similar

[rondofj]

You could be right, my car doesnt rev to 7000rpm, but instead it cuts to around 6800rpm, could the SAFC or rev/speed meter be the reason for this??

There are no physical meters/ gauges in my car apart from the aftermarket boost gauge, so you saying the SAFC or whatever was removed?? What makes u say somethings been added at some stage?

cheers

Ron

[The Dan]

Whatever it is looks like it's still connected. Those bullet terminals aren't factory fitted

[rondofj]

And I forgot, it has a turbo timer with multi-functions - speed / 0-400m / timer etc, its some weird model that I cant figure out how to operate..does this link to the ecu?

[rondofj]

thanks man - i will trace those green n white wires to see where they go

[rondofj]

anone else's opinion ?? is my ECU stock?

cheers

[KiwiRS4T]

R34 and S2 Stagea share the neo engine and ecus are almost identical. Guess you could check with Nissan Fast.

[wolverine]

It isn't going to matter much if it is an S2 stagea ECU or R34 as the Nistune type 4 board will work in either.

[rondofj]

sweet.........

[The Dan]

anone else's opinion ?? is my ECU stock?

cheers

I thought I already mentioned it was standard

[rondofj]

Actually its not standard, its a stagea ECU according to Matt from Nistune - I know they are almost identical to the r34ecu, but Matt said its a stagea one - quote :

'ECU is from a S2 Stagea 0V812 (JECS)

If this is installed in an R34 GTT then for some reason the original ECU has

been swapped. Is the car auto or manual? Stagea are auto'

[rondofj]

Car is manual by the way

[wolverine]

There are manual S2 stageas, ie the RS4S as well as auto models.

The R34 GT-t PowerFC works fine on the RS4S with the exception of the traction control which is not present on the S2 stagea AWD models.

[QWK32]

thats a S2 Auto stagea ecu. mine is the same part number. also the reason why your rev limit is lower than expected, the Stagea's rev limit is 6600rpm compared to a manual R34's of 6900rpm (values from a standard rom). As wolverine said it wont be a problem if your planning on installing nistune, they are both type 4 boards, the only thing you wont have is traction control. you could ask Matt if its possible to load a R34 base image to the nistuned stagea ecu and have everything work as normal.

[rondofj]

thanks Josh, u have solved my rev limit problems! Now I know why it only revs to 6600-6800rpms - the GTT goes to 7000rpms.

Ordered the Nistune and asked Matt to load the ER34 base map, so hopefully that problem is gone when tuned. He said its ok to

load the R34 maps onto the stagea ecu, and now I also know why I dont have traction control..

Faarrk who was the idiot out of the 3 or so past owners who put the stagea ecu in my car..!!