Project: ECU Database

Well, I'm really reep into the Accord ECU's now and I realised that the're close to NO information shared about our cars concerning the ECU.

I dedided to start this thread so we can build a nice database about our car's ECU.

Here's how it will work

Get any 3rd gen Accord ECU that hasn't been posted here. Scan it and post it here.

You just have to name the file according tothe ECU number printed on the side. Then, give a brief description of where it came from.

Here's what I got:

PJ0-A03 201. Accord SE-i 1989 Canadian Manual
PH3-0732 Accord 2.0si 88-89 JDM Auto
PH3 Accord 2.0si 86-87 JDM (I need more info from thegreatdane about this one)

I scanned the ECU's I got with my scanner set at 150 DPI. You can also use a camera with a MACRO function. What's important is that we acually see the board and the markings on the MCU.

Thanks for your time.

Once this is done, The next level will be ECU tuning :D

i have a pjo from a usdm 88-89 lxi, and a p75 from a 94+ ls (teg).

I'll edit this post and put up pictures once i get home from work.

The ecu that I scanned is an '86-'87 (JDM='85-'86) auto 37820-PH3-043 (-0431 if you go by the part nr. sticker). Date: 86.10.03

I wanted to get the ecu scanned with my scanner, but it resulted in a really dark picture???, so I took it with a digital camera.

This is a EDM A20A4 no EGR and no O2 sensor
the number is 37820-PJ0-604
the car was 89 EXi
http://www.pieszczoh.republika.pl/37820-PJ0-604-1.JPG
http://www.pieszczoh.republika.pl/37820-PJ0-604-2.JPG
http://www.pieszczoh.republika.pl/37820-PJ0-604-3.JPG

:-)

oh man i would love one of those!

one thing i've noticed about the usdm ecus is that '86-'88 are smaller than '89. the '89 ecu is longer like the jdm ecus you scanned.

here's a link to a picture of another edm ecu without egr or o2: http://www.marklamond.co.uk/ecu-data...04/pj0-604.htm

what the hell is he talking about where it says, "Base mixture is set via a potentiometer in control box in engine compartment." ?

i've got some pics, i just need to find a way to upload them. my average pic is about 3mb and i don't think photobucket will let me put something that big.

i was wrong about the '89 being longer. it looks like all the kl emission ecus are that size. another thing i noticed is the '88 and '89 kl ecus use OKI processors instead of the matsushita.

pj0, 88-89 lxi, 0bd0
http://memimage.cardomain.net/member...14_93_full.jpg

p75, 94+ integra LS, obd1
http://memimage.cardomain.net/member...14_92_full.jpg

02 rsx-s, k-pro tuned, obd2(?)
http://memimage.cardomain.net/member...14_94_full.jpg

Yep, so that's the ecu collection. You're welcome if it helps, sorry if it doesnt :)
http://memimage.cardomain.net/member...14_95_full.jpg:rockon:
http://memimage.cardomain.net/member...14_96_full.jpg

WOW!!!!

That PJ0 ECU looks like it's OKI 8XC154 based.

Do you have any close-up pictures of it?

It doesn't look like it's made by Matsushita or but by Densigiken instead. This is VERY interesting!!! It even has an external ROM.

We're getting closer to what I'm looking for!!!

ok im at a loss...im no ecu tech nerd so what are the differences you guys are looking for? and what are the advantages of one vs the others?

excuse the noobness...i just want to know

Yeah, it has Oki written all over it. But, it IS made by denshigken.
More pics, as requested:
*edit* i tried using a different pic site last night...guess i'm going back to cardomain...*

http://memimage.cardomain.net/member...14_97_full.jpg
http://memimage.cardomain.net/member...14_98_full.jpg
http://memimage.cardomain.net/member...14_99_full.jpg
http://memimage.cardomain.net/member...4_100_full.jpg
http://memimage.cardomain.net/member...4_101_full.jpg
http://memimage.cardomain.net/member...4_102_full.jpg
http://memimage.cardomain.net/member...4_103_full.jpg

My camera doesnt do high res stuff, and apparently my scanner doesnt, either. I dont get how you guys get such clear shots

....

Hmmm. This is definetly the ECU I'm looking for :p It has an external ROM and a TTL Connector. I wonder how many 3rd gens were built with this ECU. This one is DEFINETLY chippable with other fuel maps and tunable to some extend.

I got my hi res stuff with my scanner, that's all. It's an old Epson 610 but it works great.

How much do you want for that ECU? :p j/k

Honestly, this definetly needs to be investigated.

I bought it from Bitesize or something, from ebay. This one was in good condition, and really cheap. Make me an offer, i already have an ecu. If it'll help you, or the site, then i'll gladly give it up.

Carrot, can you point out on his pics where you are seeing the external ROM and TTL connector? Also, what makes you think this is chippable?

Getready, please post any/all numbers that are on the outside of the ECU to show what type it is (PJ-0, Y-1 etc.). Also, is it for a manual, or automatic, and what model/year?
Thanks.

I'll give you what i've got:

i bought it off ebay from a member on this board named BITESIZE. The ecu is, from what i understand, a manual 88-89 usdm lxi. under the barcode, it has the number 37820-pj0-l022. Under that, there's a KL . Under that, there's the number 312-110590. For one of the plug outlets, it has the number 312-110590 l20 stamped on it.

Well, reason I ask is that I have a manual '89 LXi, but my PJ-0 ECU looks completely different. Here it is:
[IMG]http://img78.imageshack.us/img78/788/pj014ly.th.jpg[/IMG]

As you can see, it is completely different. Wonder why?

Yeah Rob, this one is made by matsushita. It have that same one here and still can't do anything with it. It has no external ROM or connector.

The OKI ECU is much more vesratile.

On this picture you can see everything.

http://memimage.cardomain.net/member...4_101_full.jpg

The 28 pin IC is the actual ROM. To the right, you have the OKI 80C154 MCU. The 24 pin IC is the RAM.

Just below the OKI MCU, you have the TTL connector (CN3)

I can desolder the ROM, read it in my chip burner and see where the fuel tables are. I wonder how they look like. Will they be similar to the PH3 or the PM6 ?

There's only one way to know :D

This is cool, i thought i had a normal ecu. But i looked at all the pics, and it looked way different from the other pj0s mentioned.

Cartoman i have a stock Rom out of a usa PK2 MT Ecu if you need let me know.

Yeah, anything that is similar to our ECU will be profitable.

I need to get my hands on an OKI PJ0 now :p

from my junkyard research, all of the kl (california emissions) '88-'89 ecus have the OKIs and say denshigiken on the top right of the board.

the only ka ecu i have is from an '88 lx-i, and it is the smaller size with the matsushita.

Hmmm California ECU's might gain some value soon. I definetly want one of those just to look at them. I can't beleive no one thought about this before. Those Matsushita units just suck (so far).

Since the PJ0 has no control over the ignition, the fuel tables will be pretty straightforward I guess.

Cailfornia ECU 37820-PK2-6684 L-MT http://memimage.cardomain.net/member...7_153_full.jpg http://memimage.cardomain.net/member...7_154_full.jpg