Emulate CAN BUS DTC's

[qopsinonstudios]

Hi folks, I would like to know how to emulate random DTC's with a CAN BUS Shield. I know how to emulate random values like RPM's, Speed, Temp and so but I can't make it work with CAN BUS PID MODE 03 and MODE 04. Can somebody help me how to emulate it?


Thanks in advance!

Regards,
Julio.

[Hiddenvision]

Hey J,
I have played with CAN a little but to be honest I know very little about it on the technical side.
So not sure if I can be of much help,
I have only used the little MCP2515 modules with ESP8266, relaying messages over wifi.
but interested in or curious about anything CAN though so thought I would tag the topic.

[Katemonster33]

Hi there. I work closely with CAN in my day to day job. The general format of a DTC request using CAN is:

Request:
00 07 DF 01 03 00 00 00 00 00 00

Response(engine)
00 07 E8 03 43 03 00 00 00 00 00

Where 43 is the response mode (03 + 40) and 03 00 is the DTC, aka 0x0300. On the tool it should show P0300.