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Old 11-12-2018, 09:53 AM   #26
D-Rodman
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Quote:
Originally Posted by shirako View Post
The wiring related to the crank pos. Sensor and the cam position sensor are wired differently between usdm and jdm.

Even if you change for a jdm wrx ecu you will need to rewire the gray connector, b21.
It should be wired like the third picture:

green/red/black/white


I have a 2004 jdm wrx ecu in spare if you want.



On what year motor do you have to reorganize those wires ? Iíve installed 3 jdm motors and never had to change any wires. Curious.
I also know a Forester ecu can work as I have one running my 05 Saabaru right now. Canít remember with certainty but the best way to figure it out is to cross reference the ecu number and find out what it is designed to run.
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Old 11-12-2018, 10:19 AM   #27
shirako
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Quote:
Originally Posted by D-Rodman View Post
On what year motor do you have to reorganize those wires ? Iíve installed 3 jdm motors and never had to change any wires. Curious.
I also know a Forester ecu can work as I have one running my 05 Saabaru right now. Canít remember with certainty but the best way to figure it out is to cross reference the ecu number and find out what it is designed to run.
Any jdm ej205/207 with 16 bit ecu. You can check on a usdm wrx harness with a multimeter and check for Continuity, you will notice that the crank sens and the cam sensor are inverted. No crank/cam signal, no start!

Last edited by shirako; 11-12-2018 at 10:52 AM.
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Old 11-12-2018, 10:53 AM   #28
D-Rodman
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Default Two different jdm ecuís havenít worked, Iím stumped

Strange, Iíve never touched those wires on my swaps, one has been running for 5 years, another for 2 years and the other has been running for a year, I donít push them, they fire right up.
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Old 11-12-2018, 11:02 AM   #29
shirako
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Quote:
Originally Posted by D-Rodman View Post
Strange, Iíve never touched those wires on my swaps, one has been running for two years, the other has been running for a year, I donít push them, they fire right up.
The location of cam and crank sensor on usdm and jdm ecu are the same. But the engine harness are different. If you keep your usdm engine harness i think your good, but if you use a jdm engine harness, like jdm wrx or sti v7/v9 you will need to do this manipulation.

I suggest, for this issue, to do a Continuity test from ecu plug to sensor connector. If you have cam/crank signal and it wont start, you will need to check elsewhere.
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Old 11-12-2018, 11:13 AM   #30
D-Rodman
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Default Two different jdm ecuís havenít worked, Iím stumped

Not trying to give you a hard time, simply trying to make sure information here stays accurate. My swaps:
2002 wrx wagon with jdm ej207 ver 8, (out of 2004 STi)drop in, add avcs wire kit and boom, fired right up, still running no issues.
2005 Saabaru, jdm ej207 ver 7, (out of 2001 STi)drop in, add avcs wire kit and boom, fired right up, still running no issues.
2005 Saabaru, jdm ej205 (out of 05 wrx), drop in, add avcs wire kit and boom, fired right up, still running no issues.
All running on original wiring and the jdm engine harness the motors came with.

Never had to mess around with the wires you are talking about, something doesnít add up.
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Old 11-12-2018, 11:30 AM   #31
shirako
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Quote:
Originally Posted by D-Rodman View Post
Not trying to give you a hard time, simply trying to make sure information here stays accurate. My swaps:
2002 wrx wagon with jdm ej207 ver 8, (out of 2004 STi)drop in, add avcs wire kit and boom, fired right up, still running no issues.
2005 Saabaru, jdm ej207 ver 7, (out of 2001 STi)drop in, add avcs wire kit and boom, fired right up, still running no issues.
2005 Saabaru, jdm ej205 (out of 05 wrx), drop in, add avcs wire kit and boom, fired right up, still running no issues.
All running on original wiring and the jdm engine harness the motors came with.

Never had to mess around with the wires you are talking about, something doesnít add up.
Yes, the info need to be accurate! I dont want to hijack this thread, just want to give an input if it can solve that issue.

I cant find the engine wiring harness diagram for an 02 wrx... You will see the wiring config. In b20 gray connector are different. I had this issue when i swapped my hybrid motor (ej257 with ej207 heads, wrx usdm engine harness with jdm ecu 16bit)

As i said, make a Continuity test before making any change. We will see from there whats going on with this issue.
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Old 11-12-2018, 04:41 PM   #32
trueno92
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not sure if the pin swap that is being mentioned is always necessary, i only say this based on the experience of my recent engine swap.

CHASSIS:
USDM 2002 WRX

ENGINE:
JDM EJ205 v9
TGV+AVCS,

ECU:
JDM V7 wrx ecu ending in 471 (20k/GGA wagon possibly)

Chassis harness stayed USDM

Engine harness is JDM

it plugged in, and worked, as long as cam and crank sensors are the newer style (not red/orange), should be fine.
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Old 11-12-2018, 07:02 PM   #33
CarmelValleyWRX
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all i had to do was plug in the ecu and it started right up on a stock car. but i am running all USDM harness on the engine and chassis with AVCS wiring overlaid on the USDM.
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Old 11-12-2018, 10:08 PM   #34
D-Rodman
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Default Two different jdm ecuís havenít worked, Iím stumped

Never have I seen anybody have to swap those wires on a jdm ej205 or ej207 installation on to 02-05 usdm wrx. The ej207 info thread is full of real information on 02-05 usdm body cars and jdm ej207 v7 v8 and v9, there is no mention of said wiring discrepancy. His experience is unique in that respect from everything Iíve read or experienced myself on my 3 jdm swaps. Iím curious what year usdm car he was working on. Also, he is talking about a ej257 hybrid with ej207 heads.
In any case, as to the original post here, it is strange that his motor fired up with the original usdm ecu but not with the jdm ecu.

Last edited by D-Rodman; 11-12-2018 at 10:19 PM.
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Old 11-12-2018, 10:25 PM   #35
D-Rodman
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Default Two different jdm ecuís havenít worked, Iím stumped

Quote:
Originally Posted by Peaches02 View Post
Iíve got their AVCS Wiring kit and that guide but the only one that kind of pertains to the problem is the last tip. Itís a v7 ecu though, havenít heard of anyone having this problem.


Yes, but your car situation does sound a lot like that last point on the AVCS wiring instructions. Even if your ecu is from a ver 7 itís worth testing as described on the instructions. Test the injectors.
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Old 11-12-2018, 10:37 PM   #36
shirako
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Quote:
Originally Posted by D-Rodman View Post
Iím curious what year usdm car he was working on. Also, he is talking about a ej257 hybrid with ej207 heads.
In any case, as to the original post here, it is strange that his motor fired up with the original usdm ecu but not with the jdm ecu.
I got a wrx 04 usdm full harness with avcs add on with 02 sti jdm ecu and another 05 wrx ecu.

OP, track your wiring as i said. You can start a car without avcs and rear cam sensor. Its a cranking/no start condition. When you have that, you need to check if your sensors create sinwave from crank and cam signal. After theses condition are met, you will have injector pulse on cylinder number 1.

Check with a noid light on injector cyl. Number 1 if you have a light pulse. If you have injector pulse, you have a problem elsewhere.

If not, ecu did not get crank and cam signal.

Let us know!
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Old 11-12-2018, 11:13 PM   #37
CarmelValleyWRX
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if your CEL is not on when key is on then your ECU is not working at all and you should not bother checking injectors or crank signals and all that.
BTW people were mentioning the ecu controlling the starter... this is not true the starter circuit is very simple and does not need the ecu at all.
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Old 11-13-2018, 12:41 AM   #38
trueno92
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Didn't The op come back saying he was shipped 32bjt forester xt ecus?
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Old 11-13-2018, 12:42 AM   #39
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Quote:
Originally Posted by CarmelValleyWRX View Post
if your CEL is not on when key is on then your ECU is not working at all and you should not bother checking injectors or crank signals and all that.
BTW people were mentioning the ecu controlling the starter... this is not true the starter circuit is very simple and does not need the ecu at all.
it does if there is an immobilizer involved
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Old 11-17-2018, 01:03 PM   #40
Peaches02
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Yeehaw we got power to the jdm ecu boys! 3rd timeís the charm and the new ecu that I sent works. I guess thatís just how my luck is.

Now the confusing part. I have no idea why the first two wouldnít connect. First one was unmarked, only labeled Ďv7í. Second one was out of a jdm SG5 labeled 2G 22611ag572. I could be completely wrong and I know we addressed this earlier in the thread but the ecu info indcates that it is a 16bit dbc unit. That one didnít work either. They both could be, by some weird chance, bricked. Thatís all I can think.

3rd ecu I was sent is also out of a jdm SG5. Labeled D5 22611ak000. This one works! I decided to try this one that was sent to me before I spent $300-400 on an 02-03 jdm ecu. The car runs and sounds good, no codes thrown.

The car is now up and running on the full jdm 205 avcs setup. Still waiting on my power steering lines to show up but sheís off to tuning here shortly.

Thanks for everyoneís input! Really helpful actually getting real responses rather than just winging it.
P.s. sorry about not providing any photos for easier reference. I was having a hard time linking them on my iPhone
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Old 11-17-2018, 01:18 PM   #41
CarmelValleyWRX
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Quote:
Originally Posted by trueno92 View Post
it does if there is an immobilizer involved
true but USDM wrx does not have immobilizers until 06+ the 05- is good old fashioned starter circuit.



good you got it running! now the challenge of tuning in AVCS so it actually improves performance. AVCS has been a big PITA for me to learn to tune. still working on it. there are so many different OEM cam maps and pro tuners are VERY secretive about their methods.
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Old 11-17-2018, 05:44 PM   #42
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Quote:
Originally Posted by CarmelValleyWRX View Post
true but USDM wrx does not have immobilizers until 06+ the 05- is good old fashioned starter circuit.



good you got it running! now the challenge of tuning in AVCS so it actually improves performance. AVCS has been a big PITA for me to learn to tune. still working on it. there are so many different OEM cam maps and pro tuners are VERY secretive about their methods.
I was talking to my tuner and he says thereís a possible chance that he wonít be able to download and read the rom. Any idea why that would be? The car is up and running fine, donít know why he wouldnít be able to communicate with the ecu.
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Old 11-17-2018, 09:59 PM   #43
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Congratulations, and just to clarify, you didnít have to do anything to the wires Shirako was talking about, correct ?
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Old 11-17-2018, 10:31 PM   #44
CarmelValleyWRX
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Quote:
Originally Posted by Peaches02 View Post
I was talking to my tuner and he says thereís a possible chance that he wonít be able to download and read the rom. Any idea why that would be? The car is up and running fine, donít know why he wouldnít be able to communicate with the ecu.
open source should be able to communicate..?
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Old Yesterday, 12:52 AM   #45
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double post...
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