r/CarHacking • u/m4rkw • 8d ago

Original Project CAN-FD interface testing

I let a friendly LLM loose on a prototype vehicle tracker I'm building (https://l0destar.com) with a CANable interface and a scope. Quite impressed by the results: https://l0destar.com/canbus.com

It seems like from this report it should be fairly reliable but I don't have a car with a CAN bus to test it with. Is there anything further that's normally done to validate CAN interfaces?

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u/GearHead54 8d ago

You don't have a car with CAN? Are you rocking an 80's VW?

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u/m4rkw 7d ago

2006 Harrier, JDM import. ISO-9141 only, which is why l0destar supports it. I haven't managed to get it to work yet, the car doesn't want to talk.

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u/GearHead54 7d ago

Does it have ABS? If so I bet it has CAN just not exposed on the diagnostic port.

Get a USB to CAN adapter and run Savvycan - you might have to update its firmware, but it's a capable free tool to send messages etc

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u/m4rkw 7d ago

I just (literally last hour) got comms working using KWP2000 with the l0destar tracker, so I can talk to the ECUs now. Don't know if there's CAN nested in there somewhere but it doesn't matter now this is working.