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OBDI or OBDII?


g2094
10-31-2001, 05:22 AM
I have a 1994 G20 and was wondering how do I tell if it's an OBDI or OBDII?

Anyone have a list somewhere?

johnny
10-31-2001, 05:28 AM
OBDI, I'm thinking, but don't quote me...

Moppie
10-31-2001, 05:41 AM
As a general rule OBD II wasnt introduced untill 1995.
However it depends as to what model year your car fits into, and what Nissan was doing in 94.

I would say its OBD I.
But I would also wait for some of the g20 nuts to get here to find out for sure.

P10DET
10-31-2001, 06:56 AM
Originally posted by g2094
I have a 1994 G20 and was wondering how do I tell if it's an OBDI or OBDII?

Anyone have a list somewhere?

I'm pretty sure it's OBD-I. The '94 Sentra SE-R is OBD-I.

g2094
10-31-2001, 08:58 AM
Saw a post from FlossinPrimera...

OBD I is for G20s up through the 1993.5 model year, the 94+ G20s are OBD II

Is this correct? Can anyone confirm this?

Just wanted to make sure also so.

Thanks.

NismoPC
10-31-2001, 09:56 AM
Doesn't the OBD-I have only one O2 sensor? and the OBD-II have two?

If that is true, you can use that as a determining factor to which one your car has.

I am probably completely wrong, but I thought I heard that somewhere once.

Moppie
10-31-2001, 03:36 PM
Originally posted by NismoPC
Doesn't the OBD-I have only one O2 sensor? and the OBD-II have two?

If that is true, you can use that as a determining factor to which one your car has.


On most japanese cars I've seen this is a good determining factor.
However I know of at least one that are OBD I and use two O2 sensors.
I know there is something on the ECU itself that will tell you, but I have no idea its actualy say's "OBD I" or if its incorperated into the ECU number.

Try a search for OBD 1 and see what you find.
I believe there is a site called www.OBDII.com or something similar.

P10DET
11-01-2001, 12:27 AM
Originally posted by NismoPC
Doesn't the OBD-I have only one O2 sensor? and the OBD-II have two?

Ah! Good point. This is certainly true for the SR20. Very astute.

NismoPC
11-01-2001, 08:01 AM
Originally posted by P10DET


Ah! Good point. This is certainly true for the SR20. Very astute.

Why thank you! :D

CanadianG
11-03-2001, 07:03 PM
OBD means????
and the I or II diferentiates how??

Jay!
11-03-2001, 07:09 PM
Originally posted by CanadianG
OBD means????On-Board Diagnostic. :D Someone else can get the second part. ;)

rickp
11-08-2001, 10:05 AM
Does anyone know where I can get PC software for my 96 G20? I have an interface device for PC to ISO9141 serial communication.

T4 Primera
11-10-2001, 02:41 AM
Originally posted by rickp
Does anyone know where I can get PC software for my 96 G20? I have an interface device for PC to ISO9141 serial communication. Check this out:
http://www.ghg.net/dharrison/obdscan.html

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