Originally Posted by
scott451
It's a HUD from a 2005 vette that I am trying to interface to another vehicle. I don't actually have the vette. I was hoping to use some ELM322 based tool to collect the J1850 commands from a vette.
I can probably get access to a Vette, but is the instrument J1850 (class 2 serial data) the same bus that is on the OBD-II connector? If no, where can I tap this bus without tearing apart the car?
Actually, the only proprietary message I'm looking for is the one that the vette sends to tell the instruments (and/or the HUD) that the car on. The HUD won't powerup without it. all other signals are direct wires (e.g. speed, rpm, etc).
Thanks,
-Scott