370z CAN Bus Data & Question?

madwi

Very nice! Thanks.

gbrettin

That's very cool!

MotorvateDIY

Just having a little fun & re-verifying the CAN bus commands:
(I do have some 370z logs on their way to me and I expect them to me mostly the same and should work with both gauge clusters.
I will give an update after the analysis is done)

SeeThruHead

you can record my can bus if you want.

also this guy has some stuff on his blog
https://projectbytes.wordpress.com/2...z-can-hacking/
https://www.dropbox.com/s/cfpzb2mpj4...0CAN.xlsx?dl=0
also this
https://github.com/rampage128/niscan

https://github.com/rampage128/cardro...ontroller.java
maybe this can help too

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MotorvateDIY

Thanks for the links... I think I have already read them, but I will double check.

I will send you a PM about logging CAN bus data.
Thanks for the offer!!

MotorvateDIY

Small update:
Thanks to a tuning shop in Poland, I have some 370z logs -AND- when I played them back on my G37 gauges, everything worked as expected!!

There are more 370z logs on their way to me and I will verify them against my G37 logs.

All of this will allow different engine swaps to have functioning stock gauges
and it will also allow the required ECU data to be translated and sent to different transmission control module, like the wonderful ZF 8HP for proper integration and function.

When I have looked at the other CAN logs, I will update the thread here.
If there is enough interest, I could put together and episode or two on how to get started with Nissan/Infiniti's (or any) CAN bus.

THE BULL

Bump for this.

gbrettin

I am so damn excited about this!

Uxi

Any updates?

Kinda hoping to get something going to replace the left dot gauges with more useful info, especially having TPMS, temp, time, MPG, etc all in one little screen.

MotorvateDIY

YES!

Unfortunately, I created multiple threads so the updates are in a few places.
Here is my attempt to get everything into one thread:
LCD Gauge Update #3: 35 Data Items on 16 Pages!

TL;DR
https://youtu.be/lndZiRxDNOo

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.

INV_MY_370

I found few ways to do complete scan and ways to send raw commands with the elm Bluetooth devices

If anyone knows the command that can be sent to clear the low tire light. Let me know please. I have already been able to do the basic, like honk the horn and headlights. Even the wippers.

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.

MotorvateDIY

Since you are using an ELM327, you must be using UDS (unified diagnostic services) commands... good work! Did you reverse engineer them from a scan tool, or use that UDS spreadsheet that is floating around?

There is a CAN bus message that turns on/off the TPMS light and this is sent by the BCM depending on the TPMS status.

You might think that all we need to do is to send the command to turn off the TPMS light, but that won't work.

Here is why:
The BCM is also sending the command to have the light turn on 10 times per second.

Unfortunately, the result is an unpredictable / flickering TPMS light.
We can't have 2 devices sending opposing commands.

Turning off the TPMS light is something we have been working on for the last year and will be testing 2 different solutions on my G37 this fall.

One is an RF solution (simulates TPMS data) and the other is via the OBD port.
I'm sure many people would like to turn that TPMS light off... I know I want to!