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03-12-2009, 10:50 PM | #1 |
Scooby Newbie
Member#: 152711
Join Date: Jun 2007
Location: PDX
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Swapped: A/T -> 5MT 2005 2.5RS, one small problem
So, I have almost complete success now in my swap of a 2002 2.5RS sedan 5MT into my 2005 2.5RS wagon. (Two transmission rebuilds later...)
So far, about 700 miles - after this weekend we'll have 1100 miles on the swap. Successes: Transmission and clutch mechanically work great (after center diff, case, and transfer shaft swap) No fluid leaks of any kid (had to replace front axle seals) ABS system works fine, no issues Reverse lights are wired and work as expected Speed sensor is wired and functional Ignition system is properly wired with clutch switch However, I am still reading a P0600 Code with my scanner, and there is a solid check engine light and a flashing cruise control light. The cruise control system does not currently work. Luckily, the car runs fine, but I would like to fix this problem and regain my cruise control for commutes. I understand that the P0600 code is for a Serial Communications Error, basically the ECM can't find the TCM and isn't pleased. Looking at the ECM pinouts for the drive by wire 2005 SOHC engine, there doesn't appear to be the pin that tells the computer if it is a manual or an automatic, which I believe is common in previous Subarus. Anyone know what I need to do to convince my ECM that there isn't an automatic trans any more? Looked briefly at the ROMS for the ECM, and I think the manual and auto are identical. I think that if I get a Tactrix cable, I can permanently disable the check engine light, but I don't think that will get me back the cruise control. Any advice would be greatly appreciated! Cheers!
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03-12-2009, 11:55 PM | #2 |
Scooby Specialist
Member#: 101865
Join Date: Nov 2005
Chapter/Region:
NWIC
Location: Covington, WA
Vehicle:88 GL-10 STi silver |
i am having a simular problem with a 97 auto to 5mt. but its a P1127 or a P1227... same problem trans id code.
can someone help??? -=Suberdave=- www.suberdave.com |
03-17-2009, 06:04 PM | #3 |
Scooby Newbie
Member#: 152711
Join Date: Jun 2007
Location: PDX
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Anyone have any actual input?
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09-08-2009, 12:50 PM | #4 |
Scooby Newbie
Member#: 211094
Join Date: May 2009
Chapter/Region:
MWSOC
Location: in my house
Vehicle:03 WRX Wagon rotated holset Hx35!!! |
i thought i heard that u need to disconnect a ground that tells it wheter its auto or manual
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09-08-2009, 01:24 PM | #5 |
Scooby Newbie
Member#: 152711
Join Date: Jun 2007
Location: PDX
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Thanks, but I think that is only the case on the pre-2005's.
There doesn't seem to be any pin out for this on the 2005 ECM, which happens to be different from the earlier ones. 05 was the first year for DBW on the 2.5 NA, as well as the 32-bit system. If you know which pin it is, and what year ECUs it applies to, post it up. |
09-11-2009, 09:57 AM | #6 |
Scooby Specialist
Member#: 6178
Join Date: Apr 2001
Chapter/Region:
MAIC
Location: Singletracks
Vehicle:98 GM67 2 whls > 4 whls |
Can you source a manual ECU for your model year? That may be the difference. Maybe find someone who is willing to let you plug theirs in briefly to make sure that it will solve the problem and then source a manual ECU on your own.
As for tricking the ECU, if you knew what it was looking for from the TCU (+12v, wave form, ground) that would help. Could you wire the TCU in temporarily in order to find out? |
09-11-2009, 11:43 PM | #7 |
Scooby Guru
Member#: 159682
Join Date: Sep 2007
Chapter/Region:
NESIC
Location: Maine
Vehicle:1995 WRX 2015 F150 |
I am thinking you need to reflash your ECU with a 5 speed ROM. 2005 is the first year of reflashable 2.5 NA cars right?
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09-12-2009, 11:26 PM | #8 |
Scooby Newbie
Member#: 211094
Join Date: May 2009
Chapter/Region:
MWSOC
Location: in my house
Vehicle:03 WRX Wagon rotated holset Hx35!!! |
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09-13-2009, 08:22 AM | #9 | |
Scooby Guru
Member#: 159682
Join Date: Sep 2007
Chapter/Region:
NESIC
Location: Maine
Vehicle:1995 WRX 2015 F150 |
Quote:
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09-13-2009, 09:59 AM | #10 | |
Scooby Newbie
Member#: 152711
Join Date: Jun 2007
Location: PDX
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Quote:
If you look at ROMs, as soon as a given model picked up the 32bit ECU (at the same time, picking up drive-by-wire throttle pedal) the separate A/t and M/t ROMS become one. I have confirmed that my map includes both auto and manual tables. (Via tactrix connection). Also, any of the sites that you can download the maps from have only one, which works for both auto and manual. So, this 32-bit ECU doesn't seem to be able to be tricked by an external wire, and are not ROM-specific either. So that leaves a physical hardware difference, inside the case... Unless I'm missing something. |
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09-15-2009, 11:57 AM | #11 |
Scooby Newbie
Member#: 218383
Join Date: Jul 2009
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small question - diff swaping?
i am looking into the option of swaping my a/t to m/t, and after several service shops they told me i need to swap the rear diff also. is this true?
my Impreza is 2003 GX 2.0L AWD non turbo automatic. |
09-15-2009, 12:30 PM | #12 | |
Scooby Newbie
Member#: 152711
Join Date: Jun 2007
Location: PDX
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Quote:
Back on topic. |
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