obd0-obd1 harness
07-05-2004, 02:10 PM
#23
0.0 BAR
Join Date: Apr 2004
Posts: 48
Re:obd0-obd1 harness
Originally Posted by TurboEF9
Make one yourself...
I did a flat rate OBD0 -> OBD1 conversion from scratch and finished in 2 hours and 17 minutes.
That included making the ECU harness, distributor harness, and getting donar parts from a California Accord ECU, chipping the P28, and installing it.
You can make the harness yourself. It's cake.Get female plugs from an old PM5 DPFI ECU (dime a dozen at the junkyard), and some OBD1 plugs with about 6" of wire, and you're set.
I did a flat rate OBD0 -> OBD1 conversion from scratch and finished in 2 hours and 17 minutes.
That included making the ECU harness, distributor harness, and getting donar parts from a California Accord ECU, chipping the P28, and installing it.
You can make the harness yourself. It's cake.Get female plugs from an old PM5 DPFI ECU (dime a dozen at the junkyard), and some OBD1 plugs with about 6" of wire, and you're set.
07-05-2004, 02:27 PM
#25
0.0 BAR
Join Date: Apr 2004
Posts: 48
Re:obd0-obd1 harness
Wow, that is great news. Sure would make everything easier if they were all uniform. I'm wanting to do an OBD0 to OBD1 conversion on my 89 LXi Accord (MPFI). It uses a PJ0 ECU, for which I can find no support. I'd like to upgrade to a P75, but need help figuring out what to do. I assume I will need to make a adapter harness, but will need a pinout diagram for each of these ECUs, right? Are there any web resources you know of that have these diagrams?
07-05-2004, 02:36 PM
#26
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re:obd0-obd1 harness
Ooo... Accords.
Hrm, your best bet is to find an OBD0 Civic ECU, throw it in, and see what happends.
If it works, but throws a few codes, you know what wires to swap.
As far as OBD1.. Civic/Integra ECUs are the same. The differences fall for Accords/Preludes.
..same with OBD0, which is why I suggest trying an OBD0 Civic ECU before you start messing with things.
Hrm, your best bet is to find an OBD0 Civic ECU, throw it in, and see what happends.
If it works, but throws a few codes, you know what wires to swap.
As far as OBD1.. Civic/Integra ECUs are the same. The differences fall for Accords/Preludes.
..same with OBD0, which is why I suggest trying an OBD0 Civic ECU before you start messing with things.
07-05-2004, 02:41 PM
#27
0.0 BAR
Join Date: Apr 2004
Posts: 48
Re:obd0-obd1 harness
First, thanks for all the help. Second, what Civic ECU(s) would you suggest? I've got a local pick'n'pull here, so should not be too bad. Which ones would be best for a 2.0 MPFI and has a lot of support for boost?
Oh, forgot to mention, I'm trying to keep this smog legal as well. Houston requires it.
Oh, forgot to mention, I'm trying to keep this smog legal as well. Houston requires it.
07-05-2004, 03:15 PM
#28
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re:obd0-obd1 harness
Well, the thing is you're really getting into two different things..
I was jsut suggesting that you borrow someone's ECU (a buddy's or something) and plug it in and see if it works.
Now, if you want to _run_ an OBD0 for boost support, use a PM6, and the TurboEDIT software.
Then you'll have boost and a few other features.
I was jsut suggesting that you borrow someone's ECU (a buddy's or something) and plug it in and see if it works.
Now, if you want to _run_ an OBD0 for boost support, use a PM6, and the TurboEDIT software.
Then you'll have boost and a few other features.
