CANBUS Sniffing
Thread Starter
Instructor
Joined: Sep 2019
Posts: 204
Likes: 102
CANBUS Sniffing
Has anyone started on decoding of the CANBUS? I don't currently have time to get into it with my other project car, but AIM is looking for someone to help with setup of the SOLO DL lap timers.
Le Mans Master
Joined: Feb 2006
Posts: 5,979
Likes: 4,142
From: Kansas City, MO
It's going to be more tricky than in the past. The car has eleven CAN buses and five Ethernet buses. They're all firewalled off from the diagnostic port by a gateway module. So you have to get permission from the gateway before you can do anything more complex than the usual low end OBD2 stuff. You may be able to tap the bus somewhere else in the car's harness, but then you run into the possibility of encrypted CAN. I haven't found any solid information saying whether that's enabled or not.
This new digital connected vehicle platform is really, really locked down.
This new digital connected vehicle platform is really, really locked down.
Le Mans Master
Joined: Feb 2006
Posts: 5,979
Likes: 4,142
From: Kansas City, MO
Pay $20 for a 3 day pass to acdelcotds.com. GMs service information is the same system the dealer techs use. That's where I got my information. It's mostly just schematics and a really high level overview. But it's better than nothing.
Last edited by Jeff V.; Oct 30, 2020 at 11:02 AM.
Thread Starter
Instructor
Joined: Sep 2019
Posts: 204
Likes: 102
Need this for as many channels as we can identify, i.e. wheel speeds, brake pressure, throttle position..
BUS Speed:
CAN ID:
Byte Order (little or big endian):
Start bit:
Number of bits:
Channel Name:
Channel Short Name:
Max Frequency:
Signed Data? (Signed, unsigned):
Gain:
Offset:
Unit:
BUS Speed:
CAN ID:
Byte Order (little or big endian):
Start bit:
Number of bits:
Channel Name:
Channel Short Name:
Max Frequency:
Signed Data? (Signed, unsigned):
Gain:
Offset:
Unit:
Last edited by BTT; Oct 30, 2020 at 12:39 PM.
Advanced
Joined: Jul 2003
Posts: 75
Likes: 31
From: Phoenixville PA
Yes I have. And it isn't as easy to connect or read as a C6 or C7. I've spend probably 2 weeks worth of time over the past couple months on just one bus to see what useful info is on it for on track stuff.
Andrew Aquilante
Andrew Aquilante
Instructor
Joined: Jan 2022
Posts: 171
Likes: 55
From: San Jos, CA
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