(Jr Poster)

11/10/07 09:52 AM

OBD failed to communicate?

Have a 2000 SI with a recent swap to a B16b from a 2000 Type R purchased from HMotorsonline. Car runs like a champ, no ECU codes being thrown. Anyway, just tried to pass NJ state inspection and it failed OBD Communications. I do have the original B16a ECU(replaced it with the ECU that came with the motor) and my factory wiring harness was used for the swap. Any ideas? Should I put the original ECU back for inspection? Thanks in advance.

Import Tuner

(Post Master Sr)

11/11/07 01:07 PM

Re: OBD failed to communicate?

IF you put your original ECU back in the car, you'll probably get a CEL for the CKF sensor...
IF you do, you'll need to swap the oil pump and CKF sensor from the original B16...

I don't believe that JDM cars use the data link connector...

Slurp56

(Post Master Sr)

11/13/07 02:00 PM

Re: OBD failed to communicate?

Originally Posted By: Import Tuner

Correct, you will not be able to read info from the JDM ECU using the data link connector. I am unsure if this is because they do not use the DLC in Japan or it is a different protocol. You will need to put your original ECU back in the car, and as Donny said, hook up the CKF sensor.

NCSkylineR33

(Newbie)

03/25/08 07:56 PM

Re: OBD failed to communicate?

Even if you use the US ECU you will need to modify the harness you used. I did the exact same thing you did... I got a B16B off of HMO.com and put it in my 2000 Si, the stock U.S. ECU will communicate with emissions BUT you will still get a failure and need to modify that harness to bypass that sensor it's looking for that JDM motors/ECU's don't have.

If you take it to a knowledgable shop show them the code it is flashing they will know what to do. If not I can give you a number to a shop here that does the modification for $330. Will garuntee you to pass emissions with a JDM motor

NCSkylineR33

(Newbie)

03/25/08 07:57 PM

Re: OBD failed to communicate?

Originally Posted By: Import Tuner

I don't believe that JDM cars use the data link connector...

You are correct, no cars in Japan use data connectors, emissions is not tested in Japan

bahaba

(Newbie)

08/22/13 08:21 PM

Re: OBD failed to communicate?

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