Hybrid / Engine Swaps Discussions about non-stock engine swaps into Honda cars. This is not a forum for hybrid gas/electric cars.

Diagnostic tool not working on JDM ECU

Thread Tools
 
Search this Thread
 
Old Feb 19, 2009 | 09:00 AM
  #1  
619GSR's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2008
Posts: 11
Likes: 0
From: CA, USA
Default Diagnostic tool not working on JDM ECU

Hi I'm swapping a JDM H22A and trani into my DC2 integra.

My main question is can a Snap-On diagnostic tool or any other diag tool work on a JDM ECU?

My mechanic has the car right now and says he can't communicate with the JDM ECU, he mentioned something about not having the VIN number? So what's the problem here?

I also have a USDM 99 prelude ECU and he tried that one and the car cranks but never turns over (I'm assuming something is wired wrong)

Any help or info would be great guys I'm trying to get this thing back on the road ASAP.
THANKS
Reply
Old Feb 19, 2009 | 12:52 PM
  #2  
slomofo's Avatar
GDD Member
20 Year Member
iTrader: (1)
 
Joined: Jun 2002
Posts: 299
Likes: 5
From: SL,UT
Default Re: Diagnostic tool not working on JDM ECU

1. Your mechanic is an idiot using a Snap-On MT2500 Scanner. This scanner requires that you enter a few different parts of the VIN number so that it chooses the correct engine information. Any dumbass can figure out how to scroll through and select 97 Honda Prelude 2.2L VTEC DOHC, but your mechanic needs the VIN because scrolling is beyond his capabilities.

2. JDM Honda ECUs don't connect to American diagnostic equipment, so even if your mechanic wasn't a retard, he still wouldn't be able to connect.


Edit: If your car is OBDI, then tell him to enter 95 Honda Accord EX MT w/AC 2.2L VTEC.
Here's a random number pulled from google: 1HGCD7167SA039857
Give him that VIN number and tell him to use it.
Reply
Old Feb 19, 2009 | 02:28 PM
  #3  
Turbowa's Avatar
Member
 
Joined: Feb 2004
Posts: 1,326
Likes: 2
From: Casa Grande, AZ
Default Re: Diagnostic tool not working on JDM ECU

Your car will never start with the 99 ecu. There is a built in immobilizer in the ecu that you can't get around. If the ecu is OBD-II and is trully a JDM ecu then you can jump the terminals in the OBD scan port to get the generic code.
Reply
Old Feb 19, 2009 | 04:23 PM
  #4  
slomofo's Avatar
GDD Member
20 Year Member
iTrader: (1)
 
Joined: Jun 2002
Posts: 299
Likes: 5
From: SL,UT
Default Re: Diagnostic tool not working on JDM ECU

Originally Posted by Turbowa
Your car will never start with the 99 ecu. There is a built in immobilizer in the ecu that you can't get around. If the ecu is OBD-II and is trully a JDM ecu then you can jump the terminals in the OBD scan port to get the generic code.

Oh contraire mon frère, immobilizer is in the ECU. If you desolder the 26 pins for the immobilizer, the car will start.
Reply
Old Feb 19, 2009 | 04:27 PM
  #5  
Jas9848's Avatar
Honda-Tech Member
iTrader: (2)
 
Joined: Jul 2003
Posts: 769
Likes: 0
From: MD
Default Re: Diagnostic tool not working on JDM ECU

jdm ecu's dont have immobilizers last time i checked and the protocols are different between the two countries
Reply
Old Feb 19, 2009 | 04:29 PM
  #6  
slomofo's Avatar
GDD Member
20 Year Member
iTrader: (1)
 
Joined: Jun 2002
Posts: 299
Likes: 5
From: SL,UT
Default Re: Diagnostic tool not working on JDM ECU

Originally Posted by Jas9848
jdm ecu's dont have immobilizers last time i checked and the protocols are different between the two countries

We were talking about the USDM ECU.
Reply
Old Feb 19, 2009 | 05:19 PM
  #7  
619GSR's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2008
Posts: 11
Likes: 0
From: CA, USA
Default Re: Diagnostic tool not working on JDM ECU

Ya he is a dumb ***, long story..

Thanks for your help guys I figured he was just ****ing up with the scanner, ya I've heard about the immobilizer I'll check into that. I'll relay the remarks to my mechanic ;0
Reply
Old Feb 20, 2009 | 09:27 AM
  #8  
619GSR's Avatar
Thread Starter
Junior Member
 
Joined: Jun 2008
Posts: 11
Likes: 0
From: CA, USA
Default Re: Diagnostic tool not working on JDM ECU

AHhh the immobilizer can be take out tell me more about the location on this inside of the ecu what does it look like?
Reply
Old Feb 20, 2009 | 04:16 PM
  #9  
slomofo's Avatar
GDD Member
20 Year Member
iTrader: (1)
 
Joined: Jun 2002
Posts: 299
Likes: 5
From: SL,UT
Default Re: Diagnostic tool not working on JDM ECU

http://www.codecard.lt/immo/honda/ho...r/prod_37.html
Reply
Old Feb 20, 2009 | 04:21 PM
  #10  
Turbowa's Avatar
Member
 
Joined: Feb 2004
Posts: 1,326
Likes: 2
From: Casa Grande, AZ
Default Re: Diagnostic tool not working on JDM ECU

Originally Posted by slomofo
Oh contraire mon frère, immobilizer is in the ECU. If you desolder the 26 pins for the immobilizer, the car will start.
I stand corrected. I had no idea this could redally be done. I read about this a couple of years ago but never found hard evadence of it being done. Also thanks for the link at.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Gr33nBBean
Honda Prelude
3
Sep 29, 2008 07:03 AM
will@strd
Honda Prelude
5
Jan 13, 2006 06:48 AM
danxdan
Tech / Misc
3
Apr 18, 2005 04:15 AM
www.HondaWerx.com
Hybrid / Engine Swaps
2
Nov 24, 2002 11:18 PM




All times are GMT -8. The time now is 04:34 AM.