I have a 1996 Accord Wagon LX 5 speed manual. Previous owner dropped a H22A in and did nothing else. It is factory OBD1. I bought a P13 ECU to match the H22. Done hours and hours of research and still cannot find a diagram that matches my factory wiring at the ECU. I downloaded the shop manual and read through thousands of pages and none match what I have. I will add, this is factory and nothing has been replaced or tampered with. On the ecu connector A plug, I have A1-Brown, A2-Yellow, A3- Black, A4-Black, A5-Vacant, A6-Yellow. I can post another thread with all the wiring but wanna know if anyone else has done the same swap and same issue? I also verified through the service manual that my car is a 96.

 

94-95 are OBD1, 96-97 were OBD2A. Your wiring looks like it's OBD1.

Off the top of my head, to use the P13 you will need to swap A6 and A11 pins, wire VTEC, wire IABs, and maybe knock?. Can't recall on the last one.

 

I hear ya on the years of OBD1, but I swear, mine is a 96 with factory OBD1. I downloaded the shop manual, verified the VIN numbers in it and everything. My factory ECU is a P0H-L00. When googled, it comes up for that year. I’m at a loss. My VIN is as follows, 1HGCE1729TA******. So far, I’ve learned this is not a common car. 😂