Ironic to think that a TPMS might get to Mars before people.
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This is possible because the message checksum does NOT include the command byte, only the 8 byte payload data.
The way I have always envisioned this project is to divide the project into steps.
I will upload the diagrams from the Valor system, I believe they may have the codes you need on the last page.
I got my 2010 2.5 in 2011. About a months ago all my TPMS transmitters died within a few weeks of each other. I figure seven years is not bad for these things.TPMS CONTINUES TO FAIL... [RANT] And they are gonna send people the mars?
Tesla OBDII, drivers footwell, pin assignments
Pin-Label
1. EPWR
2. nc
3. nc
4. Gnd
5. Gnd
6. CanH
7. K/ser
8. nc
9. EPWR
10. nc
11. nc
12. K/ser
13. nc
14. CanL
15. nc
16. Batt
I purchased a CAN analyzer, and wired an adapter for the under dash plug (driver side).
These pins match other research I've done. I also confirmed at least that the BATT line is 12V
I set it for 1Mbs data speed, listen mode. Turned on the car, and got the usual "Door Open" alert on my VDM.
But I'm not getting any CAN at all. No data.
I also hooked my DVM on the CanL and CanH lines, and both are rock solid at 2.44 V So it looks like the line is just idle.
Is there any trick to getting the CAN data to appear on the plug?
-Scott
Sorry but I can’t help you. I only have the pinouts, not the info on how to use them. My TPMS has worked without fault for 7 years so I haven’t needed to look into it. I have been expecting a failure for some time which is why I’m following this thread.PV-EV,
I purchased a CAN analyzer, and wired an adapter for the under dash plug (driver side).
These pins match other research I've done. I also confirmed at least that the BATT line is 12V
I set it for 1Mbs data speed, listen mode. Turned on the car, and got the usual "Door Open" alert on my VDM.
But I'm not getting any CAN at all. No data.
I also hooked my DVM on the CanL and CanH lines, and both are rock solid at 2.44 V So it looks like the line is just idle.
Is there any trick to getting the CAN data to appear on the plug?
-Scott
There is nothing useful on the OBDII CAN bus (from what I can tell). It connects to the VMS, so perhaps something proprietary.
The useful CAN buses are on the DIAG connector in the passenger footwell.
Okay, so I can expect silence on the driver side connector?
Do we have the pinout for that Diag? I haven't even looked at it.
-Scott
Tesla OBDII, drivers footwell, pin assignments
Pin-Label
1. EPWR
2. nc
3. nc
4. Gnd
5. Gnd
6. CanH
7. K/ser
8. nc
9. EPWR
10. nc
11. nc
12. K/ser
13. nc
14. CanL
15. nc
16. Batt
CAN1 on 1 and 6 (VDS, TPMS ECU, Instruments, etc)
CAN2 on 2 and 7 (HVAC, ESS)
K-Line on 3 (TPMS)
CAN3 on 4 and 11 (SwitchPack, ABS, GearShift, PEM)
CAN4 on 5 and 12 (same as OBDII connector - unknown functionality)
GND on 9
+12V on 10 (constant)
The standard OVMS cable for Tesla Roadster exposes PWR, GND, and CAN1 to a DB9-F.
We are working on a new OVMS Tesla Roadster (and early Model S) cable that exposes PWR, GND, CAN1, CAN2, CAN3, and K-Line, to the same DB9-F. That should be available in a couple of weeks (just going into production early next week).
Okay, hang on...
The post from PV-EV says CAN are on pins 6/14, which match the industry standard.
What connector are you referring to? Clearly not a DB9, and not the driver because I confirmed BAT on pin 16