Monitoring OBDII Traffic

gizmodo · Post by **gizmodo** » Sat Jun 23, 2018 6:26 am

I have a 2005 vehicle, that uses OBDII. I have the classic adapter and I can get the standard PIDs to show up in the RaceCapture software. I also have a DiabloSport Trinity that has access to the enhanced Chrysler PIDs. I have seen OBDII splitters, which makes me wonder if there's a way to hook the RCP and Trinity up at the same time and monitor the traffic so I could determine the IDs for those enhanced PIDs and move all my logging over to the RCP? A big benefit to this would be it would allow me to use the RCP as my dash with some added gauges the stock dash doesn't show.

I bought an OBDII splitter and tried plugging both devices in but that didn't work since both were requesting PIDs from the PCM. About a year ago Brent mentioned a passive mode for OBDII, but the classic adapter didn't support that.

Post by **brentp** » Mon Jul 09, 2018 9:43 pm

Yep! This will dump all of the CAN bus traffic seen by RaceCapture. It will show all conversation between systems on the same CAN bus:
https://wiki.autosportlabs.com/CAN_Bus_logger

Let us know what you find out with your research!

gizmodo · Post by **gizmodo** » Thu Jul 12, 2018 12:04 am

I am hooked up to OBDII through the classic adapter, no CAN bus on this car. Does this still apply?

Post by **brentp** » Thu Jul 12, 2018 12:11 am

Unfortunately, no. It would need to be CAN OBDII.