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2018 Model 3: CAN bus IDs

bexc

New Member
Oct 13, 2019
3
0
Salt Lake City, Utah
I recently got a EVTV ESP32 CANDue board, and have been looking into analyzing data coming from the car (a Model 3 Performance). However, after running SavvyCAN (Home) and letting it run for a few minutes while I do various things like go forward, reverse, turn the lights on and off etc., none of the messages match those I've found online so far.

For example, one source of data is the Torque Pro PIDs file from EVTV Motor Verks Store: Tesla Model 3 OBDII Adapter, OEM Electric Vehicle Items, Model3OBDII - which says the vehicle speed should be on PID 0x010D.

Does anyone know if the PIDs have changed between revisions to the Model 3, or why they might otherwise not be matching up?
 

beachmiles

Member
Jun 29, 2019
111
93
Redondo Beach
Can you post the info or where you got it? I'm looking at getting this package for my M3. I am wondering if I can listen to commands sent to the cabin heater and choose whether to forward commands to the cabin heater or not
 

diamond.g

Active Member
Nov 5, 2015
2,421
1,362
Moyock, NC
Can you post the info or where you got it? I'm looking at getting this package for my M3. I am wondering if I can listen to commands sent to the cabin heater and choose whether to forward commands to the cabin heater or not
Model 3 CAN bus IDs and data
That is all the currently known PIDs. Though Tesla has in the past hidden some of the values from us on the bus.
 
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bexc

New Member
Oct 13, 2019
3
0
Salt Lake City, Utah
Can you post the info or where you got it? I'm looking at getting this package for my M3. I am wondering if I can listen to commands sent to the cabin heater and choose whether to forward commands to the cabin heater or not

In addition to the Google Docs page, there’s
Diagnostic Port and Data Access - Tesla Owners Online which had more information. The CAN bus isn’t something you can listen to and forward/block messages on, but you can send your own.
 

beachmiles

Member
Jun 29, 2019
111
93
Redondo Beach
I was thinking about doing a man in the middle between the cabin heater CAN connection and have a micro respond to commands from the CAN system master like the PTC heater would but then choose whether to actually forward them to the heater itself on a separate CAN transceiver isolated from the main CAN bus.
 

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