vehicle diagnostics

Discovery 3 CAN Bus Sniffing, Part 3: When OBD-II Frames Stay at Zero

Part 3 of the Discovery 3 CAN bus sniffing series: what to check when USB works, diagnostic requests transmit, but no CAN frames arrive.

Part 2 of the Discovery 3 CAN bus sniffing series: getting the LilyGO CANbus ESP32 detected on Windows and ready for OBD-II testing.

Part 1 of the Discovery 3 CAN bus sniffing series: the vehicle OBD port was fine, but the DIY pigtail colour chart was wrong.