370z CAN Bus Data & Question?

MotorvateDIY

Small update:
I now have full control of the G37 instrument panel/gauges using the CAN bus!
When I get 370z CAN bus logs, I will get it to work on the G37. If needed I can make up "translation gateway" to resolve any non-functional gauges.

Down the road, I should be able to get the 350/370 gauges to work with any other engine/ECU (VR, LS, HR to VQ, etc)

The 370 gauges are a little simplier to use, as they connect directly to the CAN bus. On the G35/G37 the "Unified Meter & A/C Amp" connects to the CAN bus and uses a serial connection to control the gauges.

Here is a before and after picture:

Attached Images

dash_before+after_sm.jpg (262.1 KB, 207 views)

xyrtek

I will try to get you some logs over the weekend.

Do you have a github repo with all the work you have done?

MotorvateDIY

Thank you for the getting the CAN logs for me!

No github yet, I have more reverse engineering to do and want to test/verify my assumptions.

MotorvateDIY

I know you offered this a while ago and there is a lot going in in the world right now, but if you could record your CAN bus for me, I would really appreciate it.

If possible:
• Connect CAN device and start to record
• Start up car and go for a 3-4 minute drive and use cruise control for 1 minute or so.
• Turn off car and wait 3 minutes before stopping the CAN bus recording.


Thanks in advance!

coyoteboy

I was just about to set off down this route myself until I spotted this thread

Have you been able to interact with/set the cruise or speed limiter?

I believe, but I'm not sure, that the airbag system can be triggered by an errant CAN message (unconfirmed) - if you're injecting signals onto a live car, how are you ensuring this doesn't happen and do you know what they are? Would be a right pain to write off your car with a mis-sent message.

MotorvateDIY

I can display the current cruise set speed as it is broadcast on the CAN bus.
As for the speed limiter, that is coded into the ECU and would need to be found/reprogrammed to change it.

Most of the time, I am just receiving the CAN bus message and displaying it... no chance of anything bad happening.

The messages I do send on the CAN bus are the same ones that are already on the CAN bus, so I'm not adding anything new... no chance of anything bad happening.

As for airbag deployment, the airbag module uses multiple inputs from the CAN bus (like forward/reverse, gear, speed, etc) and the crash sensors to determine air bag deployment.

Overall, I don't think there is any chance of air bag deployment via CAN bus.