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@cadreus, I have a working CAN transceiver now, and confirm there's nothing happening on the bus, until I activate LeafSpy. I can sniff both sides of that conversation, and am seeing various requests and responses, and can decode the ISO-TP packets to reassemble the UDS messages. I can...

Thank you for the suggestions folks, I didn't see any traffic on the other CAN buses either, but I now have a few strategies to try tonight: try to transmit requests on the bus using a Pycom LoPy4 board with a CAN transceiver use the same hardware to drive around and see if that stimulates any...

Yes, that's the problem, both lines are at the recessive 2.5 volts, indicating no data on the bus. I expect to see CAN hi going up to about 3.5 volts for a dominant bit, and CAN lo going to about 0V, but they're both steady at 2.5V. That LeafSpy still works indicates to me that the CAN bus is...

On my 2019 Leaf, I'm monitoring the DLC connector near the steering wheel, pins 6 & 14, trying to see the primary CAN bus data. Using an oscilloscope, I'm not seeing any data at all on either line, they're both sitting at the recessive voltage of about 2.5. Everything I've read suggests there...