. This guide covers the technical specifications, layout details, and common repair scenarios for this specific PCB. 1. Key Technical Specifications
Key takeaways:
| Pin | Function | Pin | Function | |-----|----------------|-----|----------------| | 1 | 3.3V out | 2 | 5V out | | 3 | GND | 4 | GND | | 5 | SWDIO | 6 | SWCLK | | 7 | UART_TX (to USB)| 8 | UART_RX (to USB)| | 9 | CAN1_TX | 10 | CAN1_RX | | ... | (Full table available in schematic) | ... | | c3e-mb-pcb-v4
You will often see multiple small relays on the board. These are responsible for switching between different communication pins on the vehicle's OBD-II diagnostic port. c3e-mb-pcb-v4