i got a 1990 integra so its obd0 but i bought an abd1 ecu conversion harness and distributor obd1 harness and its ran fine for months but now my cel is on and the ecu doesnt have a light on it like the obd0 does and i dont got the plug that you short out to get the codes like on a obd1 car so how do i check the codes? and i dont got a machine to plug into the obd port so do i just plug the obd0 back in with the obd0 dizzy? and check the codes on the obd0 ecu? but my cars turbo with tons of mods so im guessing that would just make more codes if i do that right?

 

Sooo you got a conversion harness but still running the obd0 ecu? you still need "short out" the plug, except instead of the eld on the ecu the check engine light will flah

Edit: the plug should be there, unless the previous owner removed it. (you would still be able to find the two wires tho)

 

I had my friend checked mine for me last time...you should try search a little more...he used 1speaker wire about 2 ft in length and plug it into the port and your suppose to read the cel by how many times the cel logo blinks...and it blinks slow to fast depending on the cel you have...I don't know what this method is called that's why I said to search ah bit more...

 

On the passenger side, remove the kick panel at the floor. Behind it is your ecu and a jumper plug (aka the service connector).

it has two wires and the plug is blue i think?? you cant miss it any way. insert a paper clip to both terminals then read the flashes in dash.
1 sec flash = 10
half secound flash = 1

 

no im runnin an obd1 ecu. ive done the plug check on a 99 civic si the plug was green under the heater core thing on the passenger side. i found one on mine with 2 wires but i think it is the one for adjusting timing what colors are the wires that go into the ecu plug that i need to jump?

 

Then just use the paper clip trick. There should only be one connector (grey I think)

 

no that's the one man.. i havnt done it for awhile but i think there is three plug's
and the only one with two wires is the connector which u hav found

im not sure what the other two are for???

mayb someone out there does lol