Yeah I heard that OBDI has 3 plugs and obdII has 4 plugs, but I did not know what they meant by that and was trying to confirm that those plugs circled are the correct ones to count???
Custommx3 wrote:Not sure on the Pinout.. but the mx-3 obdi ecus are 3 plug.
ummmm mine has 2 plugs i think....94 obd1
Jarid Perry
94 mx3 Turrrbooooo (not even close to stock) 302WHP
71 Chevy C20 (tow rig!!)
77 Jeep CJ5 (no way its stock)
06 MINI Cooper S JCW GP (few goodies) 210WHP
2008 MINI Cooper Clubman S
LOOK UNDER THE HOOD. The diagnostic connecter should be on the right hand side by the firewall if your looking at the car from standing in front of it. If its under the hood its OBDi.
LOOK UNDER THE STEERING WHEEL BY YOUR FEET. If there is a diagnostic connector there than it is OBDii.
I found this info on another post.(its not written by me)
I've been doing some more research on this subject. Up to now, I've always assumed my '97 model was OBDII, because it has a four-connector ECU and it's a '97.
But it turns out that it has no Diag Connector 2 under the dash, the FEN terminal in the diag connector under the hood is populated, and ECU connector #2 has nothing plugged into it. Now the things which plug into connector #2 in the four-connector K8 ECU on the Canadian '96 model are the extra O2 sensors and the EGR boost sensor, which are additions for OBD2. So my car is NOT OBDII. ##It's an OBDI with a four-connector ECU.##
I don't know whether this applies to all late-model European MX-3s, but its a fair bet, as, to the best of my knowledge, European governments did not require OBDII; it was at manufacturers' discretion. I think it's likely to apply to the KLDE cars as well.
What would this mean for swapping in a KLZE? Well, connectors #1, #3,and #4 on the four-connector ECU have the same numbers of pins as #1, #2, and #3 on the three-connector ECU. So, maybe you can just plug in a three-connector KLZE ECU? Not quite, if it follows the scheme in the '96 Wiring Manual. There are about 18 changes to make out of 58. But it could be manageable. Can you just plug in a four-connector KLZE ECU (KL62)? Not if it follows the scheme for four-connector KLDEs - you'd have to change 57 pins out of 58.
Now when did the change from three-connector to four- happen? There are two possible dates according to the Parts Catalogue, the first given as 941201 and the second not given, but some time before 961101, when the part changed from K857... to K861...
SO WHAT I THINK THIS IS GETTING AT IS THAT YOU CAN GET CARS IN THE UK AS LATE AS A 1997 THAT ARE OBDI BUT DUE TO A DIFFERENR WIRING SCHEME THEY ARE STILL NOT GOOD FOR THE KLZE SWAP, AND THAT YOU CAN TELL THESE CARS BY A K861 ECU.
I know for a fact that one of the cars I was going to look at has a K861 ECU, so that would mean that it is not worth buying as I intend to do a KLZE swap?????
Last edited by daryl on July 30th, 2006, 4:38 am, edited 1 time in total.
I just called the guy selling the MX3's and got him to give me the numbers on the ECU of both cars.
It turns out they are both K862
from reading the info in the last post, does this mean that it could not have the OBDII connector under the dash but still be the wrong car to use for a KLZE swap???
wow that sucks.. so with obdII u cant just swap out the ngine block? :S eew
-hec
MX-3 w/ curved neck millenia klde, boosted @ 5 psi. /bov and wastegate are good!/ nitto drag radial/ gutted interior/ millenia red top injectors, vortech fmu/aem wideband/ all bolts ons/ Car put together 100% by me. Mechanic? who needs a mechanic? ew.. real men work on their own cars!