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How can you tell if it's obd1 or obd2 ECU?
https://www.thejdm.com/forum/viewtopic.php?f=52&t=4760		 Page 1 of 1
Author:  sfc [ September 29, 2005 ]
Post subject:  How can you tell if it's obd1 or obd2 ECU?
Just wondering how you can tell the difference. Are they visually different? Is there a serial number somewhere that you can tlel from? Trying to figure out whether this fucker is obd1 or obd2. This all stems from my IACV... the one I ordered is supposedly the part from an OBD1 car...

So I'm thinking, either someone had to re-wire for obd1... or I dunno, just trying to figure out my CEL shit still.
Author:  Sean @ NDF [ September 29, 2005 ]
Post subject: 
check it out

http://www.obdii.com/connector.html
Author:  sfc [ September 29, 2005 ]
Post subject: 
doesn't really help. No pics, no item numbers for civics :/ Thanks for trying though, e for effort.
Author:  Secret Squirrel [ September 29, 2005 ]
Post subject: 
smash it with a hammer....





SS
Author:  Nikku [ September 29, 2005 ]
Post subject: 
Image ODB-1

Image ODB-2

the plug styles is way differet, now telling the difference between ODB-2a and ODB-2b is near impossible without tracing wires
Author:  sfc [ September 29, 2005 ]
Post subject: 
wow, mine is really a bastard child. The "plugs" if you will, look like the second picture, but the 3 left plug holes are the only ones with pins, the right most slot is empty. Go figure that one out?? I'm assuming it's obd-1 then?
Author:  Nikku [ September 29, 2005 ]
Post subject: 
sfc wrote:wow, mine is really a bastard child. The "plugs" if you will, look like the second picture, but the 3 left plug holes are the only ones with pins, the right most slot is empty. Go figure that one out?? I'm assuming it's obd-1 then?
woopsie i was wrong, sounds like OBD-2b
Image
Author:  munster [ September 29, 2005 ]
Post subject: 
Temp...sticky those pinouts in another thread. :up:

Katman rox.
Author:  Sean @ NDF [ September 29, 2005 ]
Post subject: 
werd, katman is good. Sorry for my first post, it was a very hurried one
Author:  Nikku [ September 30, 2005 ]
Post subject: 
munster wrote:Temp...sticky those pinouts in another thread. :up:

Katman rox.
yessah he does, i will sticky it in the engine tech forum in a bit :D
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