how can you tell obd1 or obd2
 

if u found a KA24de with no clue of year
and on engin hardness how can you tell if it is obd2 or obd1

this ka is obd1 or obd2?
what are they in the yellow?
http://i236.photobucket.com/albums/f...foot/fghfh.jpg

blue clip ecu harnesses are odbI , white clip are obd II for starters,

on odbII engines theres alot of emissions stuff, and i think odbII have internal coil inside the distributor as opposed to external coil.

im guessing this engine is odbII because of all the emissions crap, and you have a 3 wire o2 sensor, where as my odbI ka had a single wire o2 sensor.

yours is obdII you have a 3 wire o2

ok thank u
this is not my car
but my car is 88 s13 swap ka24de (obd2 from what u telling me) but with obd1 hardness and ecu will this have any effect with the engine


and what is the small box in the upper yellow circle because my is missing that thing

Incorrect. Please don't spread misinformation. Blue sockets are used on S13s, white sockets on S14s, it has nothing to do with OBD.

For the coil, all S13s use an external coil, S14s use an internal coil. Again, nothing to do with OBD. Nothing.

Finally, late 95 autos used a 3wire O2 sensor but were still OBD-I, as all 95 models are OBD-I. So again you're incorrect.

See above, that is not the only determining factor. However you're correct that the engine is OBD-II due to the EVAP purge valve solenoid and plug on the front of the intake for the EVAP purge valve.

There is no such thing as an 1988 S13. They began production in 1989. It does not matter what engine, ECU, or harness you have, as long as it meets 1989 DOT/EPA mandates (it dies, it's newer) and it runs/drives fine, you're ok. Whoever put the engine in got it from a 96+ up car and didn't swap the intake manifold I assume, so you have extra stuff not connected. You don't need any of it, especially trying to pass inspection. Your car has to pass for a 1989, nothing newer.

sorry it is a 89 not 88
so that mean i have to swap the in take manifold then in order to get rid of
all the extra stuff.




and what is the small box in the upper yellow circle because my is missing that thing?

No, just remove the extra parts if they bother you. They're not doing anything on there though.

EVAP purge volume control solenoid. Read an FSM. You don't need it, it has no pupose unless it's on a 96-98 chassis that must meet standard OBD-II emissions.

so all the vacuum line just run it the same as ka s13

actually blue sockets are also on odbI sentras, nx2ks you find me a blue socket harness and it will definately be odbI, white sockets are also found in odbII cars. every blue harness ive pulled is odb1 and every white harness is odbII. thats not misinformation ive owned at least 7 nissan cars within the last year along, and have looked at the harnesses on all of them. its just a coincidence that s14s are white plug and s13s are blue plugs. theres not a different color plug for every nissan generation. its has nothing to do with generation. that change in color has everything to do with odb. the blue plugs have a different pinout then the white plug ecus. this is the same for all nissan vehicles. if they have a white plug that are odbII. if they have a blue plug they are odbI.




http://www.sr20forum.com/200sx-se-r/...ml#post2204406
http://www.sr20forum.com/200sx-se-r/...ml#post2204469
http://www.sr20forum.com/electronics...r-harness.html
http://www.sr20forum.com/wanted/2136...ml#post2114555

in all of those posts numerous people state that blue plug ecu belong to odbI ecu, and white is odb II

and as far as coils go, an odb I harnnes (blue plug) will be external coil. and an odbII harness (white plug) will be internal coil. if you look at an odbII harness there will be no wires that will allow you to plug in a power transistor or a signal wire for a coil.

the same can be said for an odbI harnnes, the pinout on the plug for the distributor will not run a internal coil distributor. odbI harnnes also have the wiring to support an external coil.

even here
#/f/tech-talk/136803...ml#post1291500

you said that s14 harnesses (white socket odb2) cannot run an external coil and you explained why.

have you seen any blue plug odbII harnesses, no. have you seen any odb II harnnes with external coil no.

and as far as the ka series engine harness is concerned a 1 wire o2 sensor vs a 3 wire heated o2 sensor can be another tell tale sign of odb1 or obd 2
nothing i said at all was mis information.

As far as blue/white sockets go, I was speaking Schassis only. I don't do enough other Nissan work to look at ECU plugs. I do however do a shit fuck ton of Schassis work, and I can say for absolute certain that every S14 engine harness has a white socket for the ECU. I've parted over 40 of them over the last few years and serviced another hundred, trust me. All S14 harnesses have a white socket, period. But, not ALL S14s are OBD-II. 1995 models with the OBD plug under the glovebox, beside the console are OBD-I. Period. They may meet the OBD-II mandates but on any code scanner or other unit they will show OBD-I codes. Even the 1995 FSM diagnoses problems based on OBD-I codes, NOT OBD-II. The codes referenced in the FSM are different for 96-98 models.

So again, the color of the ECU socket has nothing to do with OBD on Schassis models. All S13s use a blue socket. All S14s use a white socket. All 91-95 models are OBD-I. All 96-98 models are OBD-II. Period. In your argument you could say SOHC models, with a blue socket, are OBD-I. There wasn't even a federal mandate back in 89-90, in fact those cars didn't even have a CONSULT port.

hey guys, sorry to barge in but i have a 1995 240sx s14 with a white plug that goes to the ecu, i dont have an external coil, i have a single wire o2 sensor, i have the obd2 plug under my glove box from where i checked my cel codes, but i think i also have a plug above my fuses in my fuse box on my driver side. im trying to find a manual ecu cause mine was swapped to 5spd and im still running an auto ecu. so if i buy a manual ecu from any 95 s14, it should work, right?
and also, how can u tell if you have a manual ecu or auto?
please and thank you