I'm working on a project with a GM BCM and I I'm trying to figure out how to call this PID. I've searched all over and haven't found this any thing referencing this and since it's in the BCM there isn't much info on commands. I'm working off an ELM327 chip(not a cheap one) with a serial terminal and have been able to send PCM commands and decode the response via searching and even setup formulas to make the returned values readable. But this is outside of any thing I can find in terms of what type of AT command would be used to send the same response.
I have isolated the line that's the transmit command:
A8 3A 40 30 01 ED
The returned line is:
A8 3A 40 30 00 F0
The way I have isolated the BCM is by removing it and setting it up on a bench and simulated every thing it would connect to so it was happy living on my workbench. When I activate this circuit the lines I posted are the only 2 that come up outside of the BCM's normal repeater line of E8 FF 40 03 ED
Here's a snippet of the log when I activate the circuit I'm looking for PID id for:
E8 FF 40 03 ED
E8 FF 40 03 ED
E8 FF 40 03 ED
A8 3A 40 30 01 ED
E8 FF 40 03 ED
A8 3A 40 30 00 F0
E8 FF 40 03 ED
E8 FF 40 03 ED
Can someone give me some guidance on how to call this pid? I've gathered that the BCM is mode 40 and I've tried all sorts of combinations to access it but every thing in try in 40xx or 40xxxx comes back as no data..... I'll admit that programming is likely my weakest area so I honestly don't understand a lot of the hex decoding, binary coding or any sort of translation.
Thanks
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