Other than AIMs official krpo4 canbus lib is inclusive of the custom stuff at the top so you dont need anything special nope, everything here is still accurate and in fact I believe much of this thread made its way into official aim documentation.

 

For anyone else pulling their hair out in 2024 trying to get this to work, you must check "Enable the CAN Bus 120 Ohm Resistor" option!

 

Also for any other noob looking, you don't need to wire up the RS232 leads. Just wire CAN H and CAN L with female molex pins and plug them directly into the corresponding pin on the kpro board.

You can get 12V and ground from the fusebox like any other accessory. This will save you $$$ as you don't need to buy molex harness connectors or the $10 (plus $27 shipping WTF) hondata accessory harness.