| Honda`s ECU Pin | Pin Name |
Description |
| 1 | GND | |
| 2 | RX | send Data from the PC to the ECU |
| 3 | +5V | |
| 4 | TX | send Data from ECU to the PC |
| 5 | NC | Not connected |
This port is half-duplex (RX and TX are connected) in stock form. Baudrate is unknown. In modified rom`s it`s use 10 bits 38400 baudrate.