Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

In-depth informations about EA82 ECUs


  • Please log in to reply
31 replies to this topic

#26 stickedy

stickedy

    USMB is life!

  • Members
  • 178 posts
  • Kronach/Bavaria/Germany

Posted 02 July 2007 - 04:08 PM

So, my buddy managed to solve the problem! This Transistor was damaged:

Posted Image

It's original a NPN transistor, type NEC 2SC2719, and this type isn't in production any more since several years. But you can just use a more common type with the same or better technical datas, so my buddy choosed a BD139 as replacement.

This is a very standard type and available from nearly every semiconductor company, for example Texas Instruments, STM, Motorola/Freescale, Fairchild, Siemens, Philips and so on. Here are a few datasheets for BD139: http://www.alldatash...earchword=BD139
Anf here is a document which describes the original one: http://www.datasheet...article=3746501

As you can see, the BD139 is far better, but because it's such a common part, it's really cheap. One piece cost about 0.50 US$ here in Germany. The replacement is easy, you can do it with basic soldering knowledge.

So, the ECU now works fine as it should! I write an article for the USRM in within the next hours!

AND: My problems regarding acceleration are gone!! So it seems that the ECUs interchangeable to some degree and the engine should run, but it runs bad. The test drive was a real pleasure :)

#27 Cougar

Cougar

    Elite Master of the Subaru

  • Members
  • 6,340 posts
  • Anchorage

Posted 02 July 2007 - 11:28 PM

Thanks for the update. That is the same exact thing that happened to mine though I had a different model ECU. Glad you got it corrected. This will help some others that have the same problem.

Can you tell us what the Q number is of the transistor? You can't see what the number is in the pictures.

#28 stickedy

stickedy

    USMB is life!

  • Members
  • 178 posts
  • Kronach/Bavaria/Germany

Posted 04 July 2007 - 05:35 AM

Of course: It's Q701! I forgot to mention it...

I made the article: http://www.ultimates...ead.php?t=76906

I hope this will help other people, too

#29 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 19,889 posts
  • WV

Posted 04 July 2007 - 11:14 AM

that is awesome! thanks for posting all of that information. based on the all that i've read and we've talked off-line i can almost gaurantee this is my issue as well with mine. thanks! that is a fantastic write up! i'm an electronic idiot and it all made perfect sense! thanks again.

#30 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,240 posts
  • Corvallis, OR PNW

Posted 04 July 2007 - 04:43 PM

Sweet man! This is a hugely valuable addition to the USRM

#31 TPain

TPain

    USMB Regular

  • Members
  • PipPipPip
  • 79 posts
  • WA

Posted 04 March 2012 - 01:58 PM

Do you have a pic of where that transistor is located? I'm having the same problem with my ECM.

#32 stickedy

stickedy

    USMB is life!

  • Members
  • 178 posts
  • Kronach/Bavaria/Germany

Posted 04 March 2012 - 02:28 PM

Just follow the link to the USRM (http://www.ultimates...ead.php?t=76906) and download the attached file "ECU_repair.zip". Extract that ZIP file and you'll find a PNG picture wichich shows Q701!

The number is printed on the circuit board, so you should find it.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users