370z CAN Bus Data & Question?

MotorvateDIY · 09-15-2022, 07:15 AM

Quote:

Originally Posted by 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.

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!

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