Honda Usefull Ecu Pinouts OBD2B OBD2A OBD1


fez

Member
Joined
Sep 1, 2010
Messages
642
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

New Member
Joined
Mar 27, 2015
Messages
1
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

New Member
Joined
Feb 14, 2016
Messages
1
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

Active Member
Joined
Mar 2, 2010
Messages
169
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

New Member
Joined
Jan 30, 2017
Messages
1
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.
 

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Gonzowerke

New Member
Joined
May 19, 2018
Messages
3
Car(s)
1991 CRX Si getting a B16B Swap
Here's my 97 JDM CTR PCT pinout, as taken from the connectors. OBD2a.

 


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