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Old 04-01-2013, 04:33 AM   #1
danci1973
Scooby Newbie
 
Member#: 19018
Join Date: May 2002
Location: Maribor, Slovenia
Vehicle:
1995 Legacy Wagon
Silver

Default Replacement ECU question - A/T vs. M/T

My car recently developed a P0607 (link to my post about it) issue and reading through many forums and posts it seems sometimes the cause was the ECU going south.

If I was 100% sure that was my case too, I'd just get a new ECU and be done with it. But since it's not 100% and a new ECU costs serious money, I'm on the lookout for a used one.

I could only find two on eBay right now and one seems to be a perfect fit - the donor car is almost exactly like mine - except it's a RHD. However, the seller doesn't ship to my country and he still didn't respond to my question about it.

The other one is from a sedan that had an automatic transmission - while my car is a wagon with dual-range manual gearbox...

My car VIN: JF1BP5LM46G
The donor car VIN: JF1BL5LS56G

I also asked a local dealer to check the part number for the ECU (or UNIT ASSEMBLY - E.G.I. CONTROL) based on the VIN and my car's part # is 22611AK772 while the donor car's part # is 22611AK771 (even though the photo of the donor ECU clearly shows the 22611AK772)...

So I basically have two questions:

A - Should the donor ECU work normally in my car?

B - Can I have two ECU's 'mated' to my immobiliser so I can swap back and forth as I please?


Thanks,

Danilo
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Old 04-02-2013, 08:11 AM   #2
Cathexis
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Member#: 335445
Join Date: Oct 2012
Chapter/Region: MAIC
Location: Ashland, VA
Vehicle:
2012 WRX - BLK STIG
Stg. 2 - 287whp/317wtq.

Default

A) don't know.

B) yes, the immobilizer is just a 4 digit code that can be changed with any tuning software.
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Old 04-02-2013, 08:54 AM   #3
endrswrd
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Member#: 323908
Join Date: Jun 2012
Chapter/Region: MWSOC
Location: Dayton Ohio
Vehicle:
2013 BRZ ltd
ISM

Default

You would need help getting the memory space defined for open source tuning to modify the immobilzer code. Once defined it should work just like Evo ECUs(where you can override the immobilizer or effectively disable it). You would need to define and record the immobilizer code from your old ECU, and put that into the new ECU. I dont know if you will want to use an AT ecu in your MT car though. That doesnt seem like a smart move but that is just based on speculation.

You may have better luck asking in the subaru conversion area as well.
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Old 04-02-2013, 08:14 PM   #4
arangov3
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a- yes but after you get your immobilizer to work you have to understand that AT fuel maps are different then MT because of the transmissions 1 less gear

b-yes(what they said^)
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Old 04-03-2013, 04:13 AM   #5
danci1973
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Member#: 19018
Join Date: May 2002
Location: Maribor, Slovenia
Vehicle:
1995 Legacy Wagon
Silver

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Quote:
Originally Posted by arangov3 View Post
a- yes but after you get your immobilizer to work you have to understand that AT fuel maps are different then MT because of the transmissions 1 less gear

b-yes(what they said^)
Thank you all.

So - if Tactrix manages to get the OpenPort 2.0 / EcuFlash working with my ECU (which they promised it does) I'm good to go with the AT ECU and re-flash it with the ROM of my current MT ECU.

Sweet.

D.

PS: The P0607 mysteriously cleared itself - about 2 hours after checking all the wires between the TB and ECU it just went away.
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