How can you tell if it's obd1 or obd2 ECU?

sfc · Post by **sfc** » September 29, 2005

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.

Post by **Sean @ NDF** » September 29, 2005

check it out

http://www.obdii.com/connector.html

sfc · Post by **sfc** » September 29, 2005

doesn't really help. No pics, no item numbers for civics :/ Thanks for trying though, e for effort.

Secret Squirrel · Post by **Secret Squirrel** » September 29, 2005

smash it with a hammer....

SS

Post by **Nikku** » September 29, 2005

ODB-1

ODB-2

the plug styles is way differet, now telling the difference between ODB-2a and ODB-2b is near impossible without tracing wires

sfc · Post by **sfc** » September 29, 2005

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?

Post by **Nikku** » September 29, 2005

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

munster · Post by **munster** » September 29, 2005

Temp...sticky those pinouts in another thread.

Katman rox.

Post by **Sean @ NDF** » September 29, 2005

werd, katman is good. Sorry for my first post, it was a very hurried one

Post by **Nikku** » September 30, 2005

munster wrote:Temp...sticky those pinouts in another thread.

Katman rox.

yessah he does, i will sticky it in the engine tech forum in a bit