03 software in 02 hardware?

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03 software in 02 hardware?

Postby Hitokiri » Mon Mar 06, 2006 11:03 pm

has anyone tried it?

flashing a 03 rom image into 02 hardware???

I remember hearing that there was speculation that the hardware was the same... but has anyone tried it???

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Postby Kha0S » Tue Mar 07, 2006 3:50 am

SOA flashes the same CalIDs into both years of ECU.

All of the AF41x and AF42x ECUs appear to have the same hardware.
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Location: MY02 USDM WRX / Nashua, NH

Postby intrawrx » Tue Mar 07, 2006 4:42 pm

I've seen an 03 WRX (in aus) that been flashed with what ecuexplorer deems as a UK 01/02 image. (***tek rom)

It seems interesting to me that they did that..
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Postby cboles » Tue Mar 07, 2006 6:59 pm

I heard that an '03 WRX ECU in an '02 car/harness will complain about some missing sensor. I would imagine that moving the '03 firmware to an '02 ECU in a '02 car could produce similar problems...
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Postby intrawrx » Tue Mar 07, 2006 8:02 pm

Well the full story is that the ECU was a from an 04 STI WRX then had ***TEK 3. The board was then sold to an 03 STI WRX owner who then had it installed into his car and maintained by a workshop who sells ***TEK.

I was able to plug in and have a look around and ecuexplorer ID'ed the ecu as 01/02 UK...

weird huh.
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Postby calvinc » Mon Aug 28, 2006 10:34 pm

if ecuExplorer shows it as the MY01/02 EURO WRX/STI then it most likely has their mapswitch rom on it. the EURO base is able to work on 99% of MY01->MY04 cars (AUS/SA/EURO) that want mapswitch. it will not work on the MY05 models that came with DCCD though.

STI mapswitch base - AG820 (A4RN1xxx)
WRX mapswitch base - AF531 (A4SE900D)

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Postby dorrington » Tue May 01, 2007 4:11 pm

On a similar note, I have an 02 WRX that somehow ended up with an 03 ECU. It's looking for the fuel tank sensor and the DTC cycle won't complete for it. The CEL, however, is turned off via enginuity.

Could I flash an '02 ROM onto the 03 ECU and would everything be OK?
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Postby Jon [in CT] » Tue May 01, 2007 6:23 pm

dorrington wrote:Could I flash an '02 ROM onto the 03 ECU and would everything be OK?
Yes, if you're talking about US market ECUs.
Jon [in CT]
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Postby ctracing04 » Thu Jul 17, 2008 6:16 am

I dont knwo if this helps. I have an 03 wrx. I pulled the rom down and it was 4sdg10c. It also said I had an 02 wrx..etc.

I went ahead and flashed it with the 03 a4t300L or something like that from xpttunning , Free map, Car runs with it. I do have knock at high rpm but i think I just have to tune it.
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