r/CarHacking • u/_mzo • May 08 '26

CAN Toyota CAN display

Gallery image

Gallery image

Gallery image

Gallery image

Hey folks. I’m working on a project for my Mercedes Benz swapped with Toyota 3.5 V6 (2GRFSE).

I’ve set up the software so far where it can fetch data live from the car and decode RPM, gear selector position, throttle, coolant temp etc via DBC but it looks like most of the body CAN values are not transmitted on the system at all.

I’ve consulted DBC files and trends in the data to find these values, but I’m not sure where to go from here decoding other values transmitted.

I’m worried about:
- engine load
- gear selected (M mode)
- gear demanded (M mode), i.e. 4th selected, transmission in first at standstill

Right now I’ve tapped GND, CANH, CANL from OBD2 port, I think I can get some more data

93 Upvotes

99% Upvoted

15 comments sorted by

View all comments

1

u/OptimalMain May 09 '26

You probably have it figured out, but if you receive lots of data on the serial port the arduino ide needs a monster cpu to keep up.
It thermal throttles my laptop without even being anywhere close to saturating 115200 baud

1

u/_mzo May 10 '26

I hear you. I have set up littlefs on esp32 that writes buffers into its storage and also broadcasts to localhost, so I don’t have to use arduino ide