JDM V9 STi Swap into WRX

ottawarex · 10-27-2008, 08:17 AM

I have swapped a Version 9 JDM STi motor/drivetrain into a 2004 WRX and have run into a few issues.

After doing the swap, we used a V7 ECU to see if the motor was ok. Motor fired up, but went into a safe mode (IAM 0). Switched to a V8 ECU and IAM stays at 8, but the revs drop to 1300RPM and the car seems to dump a ton of fuel.

I wired up the immobilizer, cluster, integrated unit, and steering column (Didn't wire in the keyless system). The blinking "key" on the cluster disappears when the key is in the on position, suggesting the immobilizer isn't stopping the car from starting. But the fuel pump doesn't turn on.

Also, we noticed that the fuel pump relay wire (which is also connected to ignition) is switched to E5 on the V9 ECU vs E14 on the USDM ECU (or vice versa, don't have my notes with me).

Has anyone else attempted this? There may be more wires that have switched positions on the ECU? My next step is to trace pin for pin on the V9 harness.

Thanks for any suggestions.

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Hyper · 10-27-2008, 09:21 AM

can't help you with the immobilizer thing

however as far as the harness goes, it is the same as V8, and so are the ECU pins
the only difference is the neutral position switch which is inverted, which means that you need V9 ECU to make your AVCS work
there are ways around it, but I highly recomend using the proper ECU

ottawarex · 10-27-2008, 09:26 AM

Thanks Hyper. Is there a way to use the V9 ECU without the immobilizer?

Hyper · 10-27-2008, 04:57 PM

I was unaware JDM STI had immobilizers in the first place

what is the ECU id?

also, how do you know you have an actualy V9 driveline?

ottawarex · 10-27-2008, 05:09 PM

Thanks. The engine code and chassis code both suggest its a 2005 JDM STi.

There is an immobilizer for sure (wired it in) and has the immobilizer key.

I can get the ecu code tomorrow. Any suggestions?

We for sure found 2 extra wires to add that ran from the immobilizer to the ecu and the main fuel pump relay goes to another pin on the JDM harness.

Thanks for the help.

Quote:

Originally Posted by Hyper

I was unaware JDM STI had immobilizers in the first place

what is the ECU id?

also, how do you know you have an actualy V9 driveline?

ottawarex · 10-27-2008, 07:25 PM

Here's the info on the strut tower:
GH-GDB
GDB-032815
GDBE4EH ZLC
B20 EJ207DW7CR
51E TY856WB6KA

On the ECU:
22611AJ810
112200-8801

Thanks again.

Hyper · 10-28-2008, 04:12 AM

yeah, ecu points to V9

I've never wired immobilized cars so I don't even know what to tell you here... one thing I would try, if you have ALL bits from the car and you swapped them over which carry the immobilizer code (cluster, harness, ecu, key) then I'd dig out USDM wiring diagrams and try to see how the thing is working and trace the extra wires

alternatively, I'd run V8 ECU and change the neutral position switch in the tranny on the older version
you are saying IAM is 8 - what gas are you putting into it? do you have any CELs? is the car pinging?

ottawarex · 10-28-2008, 07:36 AM

The immobilizer is wired as the 06 USDM STi, except the 2 pins that go to the ECU are in a different location. We traced all the wires physically and with a multimeter to check where they go, and in most cases, removed the wire from end to end, and added it to the USDM harness.

IAM is at 8 meaning the default value on reset. The gas is Canadian 94 octane. There is no pinging, but the car hasn't been driven yet. All this info is when using a V7 ECU with a V8 map on it.

The CEL turned on, but there was no code. When I added a wire from the black engine plug to the ECU, the car runs at a pretty high idle with no CEL until about 5 minutes of idle. At which point revs drop to 1300RPM, IAM shows 8, Injector Duty shows 0%, AirFuel Learning shows 23-24%. The CEL comes on, but again, no code.

I don't have a V8 ECU to try unfortunately. Anything else I can try? Next step is to trace pin for pin!

Hyper · 10-28-2008, 09:46 AM

wait... am I reading this right

you have a MY04 USDM WRX, you are dropping there JDM V9 driveline, using USDM harness and V7 ECU with V8 map on it???

ottawarex · 10-28-2008, 10:26 AM

Thats correct. We have the V9 ECU but it needs the immobilizer.

Currently the V9 ECU is plugged in, but the fuel pump doesn't turn on (yet it does with V7 ECU). Basically looking for diagrams to determine all the pin changes from V7/V8 to V9, as we have already found a few differences.

But to bypass the immobilizer and still use the V9 ECU would be great!

silentt · 10-28-2008, 12:49 PM

Quote:

Originally Posted by ottawarex

Thats correct. We have the V9 ECU but it needs the immobilizer.

Currently the V9 ECU is plugged in, but the fuel pump doesn't turn on (yet it does with V7 ECU). Basically looking for diagrams to determine all the pin changes from V7/V8 to V9, as we have already found a few differences.

But to bypass the immobilizer and still use the V9 ECU would be great!

There is no bypassing of the immobilizer on the USDM cars without repinning for an 04 ECU or using a standalone so I'm willing to bet it's the same for the JDM.

ottawarex · 10-28-2008, 02:07 PM

Thanks silentt. At this point, I believe I have to check each pin on the V9 harness, as there must be more differences with this ECU over the V7/V8 JDM and USDM.

ottawarex · 10-29-2008, 07:54 AM

Traced the harness pin for pin again. Only a few wires are added, and 2 wires switch places.

So this must be an immobilizer issue. Since the key blinks on the cluster without the key, and disappears with it, I think it suggests that the key is correct.

2 wires were added from the immobilizer to the ECU. I think that I may have the immobilizer installed incorrectly because other than the 2 wires direct to the ECU, the other wires are piggybacked onto existing wires. I would think the immobilizer should receive a wire and then spit out the appropriate signal rather than just tapping into wires.

Any suggestions about the immobilizer / integrated unit ?

10-27-2008, 08:17 AM	#1
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	JDM V9 STi Swap into WRX I have swapped a Version 9 JDM STi motor/drivetrain into a 2004 WRX and have run into a few issues. After doing the swap, we used a V7 ECU to see if the motor was ok. Motor fired up, but went into a safe mode (IAM 0). Switched to a V8 ECU and IAM stays at 8, but the revs drop to 1300RPM and the car seems to dump a ton of fuel. I wired up the immobilizer, cluster, integrated unit, and steering column (Didn't wire in the keyless system). The blinking "key" on the cluster disappears when the key is in the on position, suggesting the immobilizer isn't stopping the car from starting. But the fuel pump doesn't turn on. Also, we noticed that the fuel pump relay wire (which is also connected to ignition) is switched to E5 on the V9 ECU vs E14 on the USDM ECU (or vice versa, don't have my notes with me). Has anyone else attempted this? There may be more wires that have switched positions on the ECU? My next step is to trace pin for pin on the V9 harness. Thanks for any suggestions. * Registered users of the site do not see these ads.

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10-27-2008, 09:21 AM	#2
Hyper Scooby Guru Member#: 15822 Join Date: Feb 2002 Location: MOCKBA Vehicle: 1999 WRB GM6 2.12cc V9 Type RA	can't help you with the immobilizer thing however as far as the harness goes, it is the same as V8, and so are the ECU pins the only difference is the neutral position switch which is inverted, which means that you need V9 ECU to make your AVCS work there are ways around it, but I highly recomend using the proper ECU

10-27-2008, 09:26 AM	#3
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	Thanks Hyper. Is there a way to use the V9 ECU without the immobilizer?

10-27-2008, 04:57 PM	#4
Hyper Scooby Guru Member#: 15822 Join Date: Feb 2002 Location: MOCKBA Vehicle: 1999 WRB GM6 2.12cc V9 Type RA	I was unaware JDM STI had immobilizers in the first place what is the ECU id? also, how do you know you have an actualy V9 driveline?

10-27-2008, 07:25 PM	#6
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	Here's the info on the strut tower: GH-GDB GDB-032815 GDBE4EH ZLC B20 EJ207DW7CR 51E TY856WB6KA On the ECU: 22611AJ810 112200-8801 Thanks again.

10-28-2008, 04:12 AM	#7
Hyper Scooby Guru Member#: 15822 Join Date: Feb 2002 Location: MOCKBA Vehicle: 1999 WRB GM6 2.12cc V9 Type RA	yeah, ecu points to V9 I've never wired immobilized cars so I don't even know what to tell you here... one thing I would try, if you have ALL bits from the car and you swapped them over which carry the immobilizer code (cluster, harness, ecu, key) then I'd dig out USDM wiring diagrams and try to see how the thing is working and trace the extra wires alternatively, I'd run V8 ECU and change the neutral position switch in the tranny on the older version you are saying IAM is 8 - what gas are you putting into it? do you have any CELs? is the car pinging?

10-28-2008, 07:36 AM	#8
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	The immobilizer is wired as the 06 USDM STi, except the 2 pins that go to the ECU are in a different location. We traced all the wires physically and with a multimeter to check where they go, and in most cases, removed the wire from end to end, and added it to the USDM harness. IAM is at 8 meaning the default value on reset. The gas is Canadian 94 octane. There is no pinging, but the car hasn't been driven yet. All this info is when using a V7 ECU with a V8 map on it. The CEL turned on, but there was no code. When I added a wire from the black engine plug to the ECU, the car runs at a pretty high idle with no CEL until about 5 minutes of idle. At which point revs drop to 1300RPM, IAM shows 8, Injector Duty shows 0%, AirFuel Learning shows 23-24%. The CEL comes on, but again, no code. I don't have a V8 ECU to try unfortunately. Anything else I can try? Next step is to trace pin for pin!

10-28-2008, 09:46 AM	#9
Hyper Scooby Guru Member#: 15822 Join Date: Feb 2002 Location: MOCKBA Vehicle: 1999 WRB GM6 2.12cc V9 Type RA	wait... am I reading this right you have a MY04 USDM WRX, you are dropping there JDM V9 driveline, using USDM harness and V7 ECU with V8 map on it???

10-28-2008, 10:26 AM	#10
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	Thats correct. We have the V9 ECU but it needs the immobilizer. Currently the V9 ECU is plugged in, but the fuel pump doesn't turn on (yet it does with V7 ECU). Basically looking for diagrams to determine all the pin changes from V7/V8 to V9, as we have already found a few differences. But to bypass the immobilizer and still use the V9 ECU would be great!

10-28-2008, 02:07 PM	#12
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	Thanks silentt. At this point, I believe I have to check each pin on the V9 harness, as there must be more differences with this ECU over the V7/V8 JDM and USDM.

10-29-2008, 07:54 AM	#13
ottawarex Scooby Newbie Member#: 111248 Join Date: Mar 2006 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2004 WRX PSM	Traced the harness pin for pin again. Only a few wires are added, and 2 wires switch places. So this must be an immobilizer issue. Since the key blinks on the cluster without the key, and disappears with it, I think it suggests that the key is correct. 2 wires were added from the immobilizer to the ECU. I think that I may have the immobilizer installed incorrectly because other than the 2 wires direct to the ECU, the other wires are piggybacked onto existing wires. I would think the immobilizer should receive a wire and then spit out the appropriate signal rather than just tapping into wires. Any suggestions about the immobilizer / integrated unit ?