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2019 SR+
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Hi all,

I am new to OBD2 usage, but I just bought a kit to my car and want to start creating some applications. I have just started to create a test program using c#. I am using the InTheHand.Net.Bluetooth lib to talk to the OBD adapter.

But I am facing a problem. I am using this guide: https://burakalakusen.wordpress.com/2011/07/27/to-get-obd2-data-via-elm327-c/

So I am sending ATSP1-5 and then sending 0100 to test comms. When sending ATSP1-2 I get NO DATA as a response, when I use 3 - 5 I get BUS INIT: ERROR. So, all 5 fails. And If i try an bus ID it just returns the ID with no data.

Anyone with experience that can guide me in the right direction here? Thanks!
The guide you used is for conventional ICE cars and OBD protocol.
Tesla does not implement OBD protocol with "OBD request / response", etc - Tesla cars just have CAN bus connection where ELM327 adapter can be connected to read data.
You can try to use some known Tesla-specific OBD app ("Scan my Tesla", etc) to validate that hardware is working.
 

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The guide you used is for conventional ICE cars and OBD protocol.
Tesla does not implement OBD protocol with "OBD request / response", etc - Tesla cars just have CAN bus connection where ELM327 adapter can be connected to read data.
You can try to use some known Tesla-specific OBD app ("Scan my Tesla", etc) to validate that hardware is working.
Hi,

I have verified it with scanmytesla.

Ok, so basically tesla only has a stream of data that I open then. Is that how I should be tackling it? Also, what about sending data to it? I know those buttons can turn of different things trough can etc?
 

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Hi, if I'm using an OBD2 reader on a Model Y what message do I need to send to the car to unlock all of the codes shown in the DBC file?
You don't need to send anything.
 

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Thanks for everyone that has shared their work on here - especially Josh! It's been super usefull. Thought I should give something back if I am able. Doesn't seem to be any logs of all 3 can buses (Vehicle/Chassis/Party) so I've added a file from my AWD model 3 Performance. Hasn't updated for a while (no longer updating) so it is still on version 2021.4.3
Find here: https://github.com/sydneyg007/Tesla-Model-3-Logs
 

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Hello,

I wanted to share an update on the Distributed Charge project. Board A0 has been released which allows connection to the SWCAN on the charge port: http://andyschroder.com/DistributedCharge/BoardA0/Overview/ . Board A0 mounts to the TOFU, which then gives you a full on board computer with cellular to interact with the car's CAN buses. In addition to the special CAN bus that is used for the charge port SWCAN, there is a second CAN bus on Board A0 that can be used to connect to the normal CAN buses on the car. I've also produced a rough schematic showing how Distributed Charge works with Board A0: http://andyschroder.com/DistributedCharge/EV/HowItWorks/ .
 

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I received 2022.12 yesterday and took a chance to compare the changed CAN frames 315 and 376:

old:
(1588178450.689316) can0 315 [8] 3A 3A 3A 50 3A 95 7D 03
(1588178452.620446) can0 376 [8] 39 3A 39 50 3A 8A 7D 03


new:
(544.697169) can0 315 [8] 0C 37 36 36 50 37 A0 7D
(544.697792) can0 315 [8] 01 36 37 00 38 37 00 00
(544.698275) can0 315 [8] 02 00 00 00 00 00 00 00
(545.665189) can0 376 [8] 0C 37 36 37 50 38 84 7D
(545.665675) can0 376 [8] 01 38 38 00 38 FF 00 00
(545.666389) can0 376 [8] 02 FF FF FF FF 00 00 00


It looks like both changed to a multiplexed frame, the first 7 bytes moved "one up" and the two bits signal of the last byte of the old frame moved to bit positions 2 and 3 of the first byte in the new frame.

I have no idea what the frames 1 and 2 may contain. It looks like more temperature values since it was about 15°C when the log was taken.
 

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Hello,

Do you have more information on the meaning of these parameters on a Model 3 ? (Target Active Cool, Target Passive, Target Active Heat)

Thank you
Wording implies it's cooling system targets to keep Powertrain (PT) and Battery temperatures below these values.
I've tried to log them a while ago, but no significant changes were observed.
Also, these battery cooling targets are way above of healthy battery temperature - so I would assume this message is a leftover of something not implemented or removed.
 

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Hello,

I'm having difficulty analyzing the CAN signals of my Model 3 with a Raspberry Pi 4B.

As soon as I connected the 18th yellow pin and the 19th white pin of the 26-pin connector (referring to the spreadsheet) to the CAN-H and CAN-L pin of a Raspberry Pi CAN BUS module, my Model 3 turned off air conditioning and seemed to have stopped working. I guess my model 3 stops working when there is any continuity between the 18th pin and the 19th pin.

Is my Model 3 working correctly and could you give me any advice or help?

Thank you.
 

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Hello,

I'm having difficulty analyzing the CAN signals of my Model 3 with a Raspberry Pi 4B.

As soon as I connected the 18th yellow pin and the 19th white pin of the 26-pin connector (referring to the spreadsheet) to the CAN-H and CAN-L pin of a Raspberry Pi CAN BUS module, my Model 3 turned off air conditioning and seemed to have stopped working. I guess my model 3 stops working when there is any continuity between the 18th pin and the 19th pin.

Is my Model 3 working correctly and could you give me any advice or help?

Thank you.
Aw it worked well by setting the CAN interface listen-only. Thank you!
 

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May I ask another question?

I'm sorry if I missed the information, but is it correct that the chassis CAN bus cannot be accessed via this blue 26-pin port behind the cover in the center console? Is there no way to get vehicle speed or something via this port?

Thank you.

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