HA Motorsports custom ECU harness for OBD2B 99-00 Honda Civic with an automatic transmission B series engine swap. This harness allows you to use our OBD1 Neptune Auto ECU with the OBD1 P78 transmission control unit.
The stock 1999-2000 Honda civic with automatic transmission controls both the engine and the auto transmission from the same ECU/PCM. This works well for the stock engine and transmission, but when performing a B series engine swap with auto transmission this becomes a problem. By directing the transmission controls to a separate transmission control unit, you are able to use our Neptune Auto ECU to run and tune your B series engine swap without loosing automatic transmission function.
* Uses all OEM connectors and pins for OE quality and durability.
* For use with our Neptune Auto ECU ONLY. Will not work with any other ECU setup.
* Must use our P78 Auto TCU or equivalent.
All HA Motorsports ECU's, products, and services include a One Full-Year VIP Warranty