Honda OBD0 - OBD1 - OBD2A - OBD2B ecu differences.


rvm

rvm

admin
Staff member
Joined
Apr 15, 2006
Messages
10,708
Car(s)
EK9/Civic
Hello,

Well all my questions started when i was trying to get and apexi power fc + commander for my car.

The apexi power fc that i found for my car was compatible with Honda Integra Type R 95 - 2001 and 97 - 98 (august) EK9 Honda Civic Type R.

I was very confused, because the Computer for 98 Sept - 00 EK9 Honda Civic Type R, was like 600 $ + more expensive. The Apexi Power Fc + Commander goes for around 700 $ + shipping.

On hondas 1991 + the ecus are found at the passenger footwell.

First of all, lets see a pictures that explain the physical differences between OBD0, ODB1, OBD2A, OBD2B.

attachment.php


From up to down order.

OBDII b 98 Sept - 00 Honda Civics
 OBDII a ECU 96 - 98 (August) Hondas Civic and 95 - 2001 Integras
OBD I ECU 92 - 95 Hondas
OBD 0 88 - 91 Hondas


Well after searching over the internet, i decided to see for myself my ecu. I wrote this little tutorial. My car is a 1999 Honda Civic Type R

First remove the 3 screws you find on this plastic cover, 2 are made of plastic and 1 a meta screw. See the red circles.

attachment.php


After removing this plastic panel, you will see the ecu

attachment.php


As you can see my 1999 honda civic type r ecu is a obd2b

attachment.php


attachment.php


This means that for me to setup a apexi power fc + commander ecu, i will have to buy a conversion harness / ecu jumper from obd2b to obd2a.

I found one! hehehe

attachment.php


You can get one from http://phearable.net for like 150 - 160 $ shipped.

Right now i have a stock motor, so i decided to buy a chipped ecu from phearable. Maybe by the end of this year i decide to buy a apexi power fc + commander. :D

I hope you find this usefull, since i didnt't find it anywhere else.
 

Attachments

Nice information mate, i thought that the 98-00 ek9s where also obd2a, :(
 
and thus why im so glad when i go for power fc i can just get an obd1 and plug it in lol - tho tbh ive not seen an obd1 power fc but they must exist.

as my b16b is from a 2000 ek9 thus obd2b and as you say the power fc's are like twice the price of the 2a's :(

Chris_Gee
 
Chris_Gee said:
and thus why im so glad when i go for power fc i can just get an obd1 and plug it in lol - tho tbh ive not seen an obd1 power fc but they must exist.

as my b16b is from a 2000 ek9 thus obd2b and as you say the power fc's are like twice the price of the 2a's :(

Chris_Gee
Click to expand...
I didn't found 92-95 civic's apexi power fc in japan aftermarket parts sellers. I read on another forum, 1 guy in the US, had one, on his 95 civic, but with a obd1 to obd2a conversion harness :confused:
 
Will that harness fit in behind the plastic ecu cover...
 
Hey man!!, I think you just saved me from alot of frustration!! I'm getting soo confused I have a VTEC d16y8 head for my NON-VTEC d16a6 block. The head is off a 99' Honda Civic EX, and has been nothing but confusing, when I had my crappy d15b1 in the bay I successfully converted to MPFI set-up. So, in turn I'm treating it as a 1989' Honda CRX Si. But now comes the tricky part (to me atleast!), I need to wire the VTEC for my d16y8 head and buy a Jumper Harness. I just bought a P28 ECU by accident on eBay.ca for $40, can I use that ECU in conjunction with my d16y8 swap?. EXTREMELY CONFUSED. I hope you can guide me through this mess!!. Thanks for ANYYY replies!!!!!!.:):):)

P.S. I might be rebuilding the head to "Stage 3" skunk2 set-up, but we'll talk about that later:P


rvm said:
Yep!

check out this thread:

http://www.ek9.org/forum/resource-a...-type-r-obd2b-obd2a-ecu-installation-how.html

:drive:
Click to expand...
 
hoping someone can clear this up for me...
Why do people go for remaps seem to always need an obd1 ecu?
What are the actual differences between the ecu's? (more processing power hence more sockets???)
If i were to remap a OBD2B car what would be the ways of doing this?

I only ask as i am completely usless when it comes to electrical components and its always something i've been curious about! TA!
 
elchunk said:
hoping someone can clear this up for me...
Why do people go for remaps seem to always need an obd1 ecu?
What are the actual differences between the ecu's? (more processing power hence more sockets???)
If i were to remap a OBD2B car what would be the ways of doing this?

I only ask as i am completely usless when it comes to electrical components and its always something i've been curious about! TA!
Click to expand...

Because you can't socket a obd2 ecu to read from a external rom(chip) whereas with the obd1 ecu's you can. The motherboard and processor are different in a obd2 ecu and I believe the coding itself is different so a whole other kettle of fish to deal with
 
You must log in or register to reply here.
Back
Top