Honda Usefull Ecu Pinouts OBD2B OBD2A OBD1

[fez]

Im trying to find the fan control on my obd2b ecu. Apparantly it is connector A pin 20 (green wire) but on my wiring it is black and white? Why is this? Is it the same?

Thanks

 

[st_croix]

I did a auto to manual swap I have a problem with when I have my obd2b to obd1 jump harness with a p28 chip ecu my rpm don't work but when I put a stock ecu rpm work fine if there had somebody with this problem can u help me please to fix it or how you fix yours thank you

 

[Yury]

Hello everyone! Is anybody knows how to switch obd2a to obd2b 3stage jdm (p2j-j81) with manual tranny that it could works correctly. At this moment seems like vtec won't engage. Maybe someone has pinout? If so please share.

 

[ImmortalOne]

As seen on the first page of this thread... in order to run a USDM EM1 ecu (OBD2B/37820-P2T-A11) in my 2000 EK9 Rx I have to do the vtec oil pressure switch bypass by splicing the VTM/pin C10 (which is normally not in the EK9 harness) with the VTS/pin B12. A previous owner has pinned a VTM/C10 wire into the harness plug so the mod was easy. Factory the C10 is unwired however there is a pin on the stock ecu (OBD2B/37820-PCT-J11) in this location.
My question then is whether or not this will be harmful to the stock ecu or cause any issues if I leave these two connected?

TIA

 

[Theremotedr]

Hi,
Can I ask for some info please.
I have a Civic EP Ecu year if vehicle 2003.
I was told that the Ecu was the same for Type r EK9, how true that is I'm not sure.
I'm looking for Ecu pinouts.
I have supplied photos of Ecu.

I'm putting together a small rig on the bench to show how the immobiliser works at university.
I don't need all pin out info but just enough to connect OBD II socket, IMMO light in cluster & key reader coil around ignition switch.

Many thanks.

 

[Gonzowerke]

Here's my 97 JDM CTR PCT pinout, as taken from the connectors. OBD2a.