Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

Roadster 2.x TPMS Tool

Roadster

JdeMO Powered
Dec 10, 2016
1,515
1,212
SoCal
I would start with asking does your VMS display tire pressures, and does your OVMS likewise display tire pressures.
Good on both fronts @JohnGarziglia (see below):

1E961DB5-6FD5-4BF9-9B1C-94BDE025B217.jpeg
IMG_3359.PNG
 
Last edited:

Nvbob

Roadster 1256
May 6, 2009
381
180
Just east of Lake Tahoe, Ca.
However, I haven't tested for continuity as I don't own a multimeter. Guess it's time to get a new toy for the toolbox ;) Any recommendations? I've been looking at Fluke but there are so many!

It depends on how much you will use it and how much you want to spend. Fluke are real nice but if it's going to sit in the toolbox after being used once, . . . I picked up an inexpensive one at Harbor Freight or Walmart and it works just fine. It sounds a tone on continuity.
 
  • Helpful
Reactions: Roadster
Oct 22, 2011
202
121
Reston, Virginia
I used a "Radio Shack" multimeter for several decades until finally thinking last year that it may be inaccurate (in obsessing too much over how much voltage my Roadster battery had) so I went out and bought a Fluke 115. Found that the Radio Shack meter was pretty accurate after all. But happy I now have the Fluke.

But for what you need to check for here immediately, find an old flashlight, take out the bulb and use ordinary tape to tape two wires to each contact on the bulb, tape two wires to both ends of the 1.5 volt battery, connect one of the wires from the battery and from the bulb together, and then use the remaining two wire ends coming from the battery and the bulb to check for continuity. Touch the two wires together and if the bulb lights dimly you have a continuity checker you can use to check the pins.

If you have an inexpensive battery checker you can do the same thing taping wires to it with a 1.5 volt battery.

Important, do not only check for continuity on the two noted pins, but also check to confirm that there is NO continuity on any of the adjacent pins. It is just as easy to have solder overflow on small pins like this wire needed to be connected to, as it is to have a bad solder joint.
 
  • Helpful
Reactions: Nvbob and drewski
Oct 22, 2011
202
121
Reston, Virginia
The new TPMS subsystem in OVMS works off the concept of 'tyre sets'. You can read into a set with:
tpms read summer
(for a set called 'summer'). If you don't specify the set name, 'tpms read' will simply show you the IDs (and not save them in a set).

You can also manually define sets with
tpms write winter 11111111 22222222 33333333 44444444
You'll need to drop by a garage with a TPMS tool to get the values for those IDs.

The order of IDs is vehicle dependent. For Tesla Roadster 2.x it is FL, FR, RL, RR.

You can write back IDs with:
tpms write winter
(for a set called 'winter').

The 'tpms list' command will show you what sets you have defined.

Regards, Mark.
Here is the order I found had to do it in, not following completely the above but maybe misunderstanding it somewhat.

First, I erroneously thought I could "copy" the numbers I was getting in 'tpms read' into a tire set but that is not possible as the 'read' command inserts commas while the commands that write the numbers use spaces. It took me a while to figure that out. Then after getting zeros in the TPMS or not understanding how to write correctly, here is what worked for me in the order I did it to set both "Summer" and "Winter" tire sets in OVMS, and to upload the "Summer" TPMS numbers in to the Roadster's TPMS:

To set a "Summer" tire set in OVMS:

tpms set summer 11111111 22222222 33333333 44444444

To write that tire set to the Roadster TPMS sensors:

tpms write summer
To check to see if the numbers written to "Summer" and to the Roadster TPMS sensors took:

tpms list
To double check what is currently written to the Roadster TPMS sensors:

tpms read
To set a "Winter" tire set in OVMS for use later on:

tpms set winter 55555555 66666666 77777777 88888888
To check that both "Summer" and "Winter" tire sets are written to OVMS:

tpms list
I think I have this right. In any event, the above worked for me and I am ecstatic that I can now set the TPMS sensors in my Roadster without having to go to the SC. Thanks again to everyone who worked on this project!
 
  • Helpful
  • Informative
Reactions: markwj and drewski

markwj

Moderator, Asia Pacific
Apr 10, 2011
4,604
1,219
Hong Kong
You have an OVMS v3.2 module (or v3.1 module labelled on board as July 2018 or later), or have made the jump-wire modification. 2018.03.05 build and jump-wire done. However, I haven't tested for continuity as I don't own a multimeter. Guess it's time to get a new toy for the toolbox ;) Any recommendations? I've been looking at Fluke but there are so many!

I think a continuity check is required to narrow this down. I suggest you check all the way from the end of the DIAG cable (that plugs into the car) to the expansion connector.

A Fluke is the gold standard; If you want something to last a couple of decades that is probably it, but way overkill for what is usually required. Something simple you pickup at the local hardware / auto store is probably sufficient - although I would get a battery powered one (rather than an analog one with a dial).
 
  • Helpful
Reactions: Roadster

markwj

Moderator, Asia Pacific
Apr 10, 2011
4,604
1,219
Hong Kong
@markwj FastTech says "Discontinued" is that just how they say "Out of Stock / Backordered" or is it being modified?

The status should be 'out of stock'. No modifications necessary (that i know of).

They unexpectedly sold out of their initial stock within a few days, and are currently re-stocking. This should be back in stock at the weekend, or early next week (depending on courier shipping and customs; both of which are very unpredictable these COVID-19 days).
 
  • Informative
Reactions: drewski

Roadster

JdeMO Powered
Dec 10, 2016
1,515
1,212
SoCal
Important, do not only check for continuity on the two noted pins, but also check to confirm that there is NO continuity on any of the adjacent pins. It is just as easy to have solder overflow on small pins like this wire needed to be connected to, as it is to have a bad solder joint.
Picked up a multimeter (a Fluke 101) and tested across the correct pins and got continuity then checked adjacent pins on both sides and confirmed no continuity so it seems the jumper is fine.

So what else is left to check? Could it be that my TPMS was upgraded from the Baolong system? Is there a way to check without dismounting the tire?
 
Apr 10, 2009
702
41
I can't believe that I've been away from this forum for so long. Fortunately, I heard about this TPMS upgrade on the OVMS mailing list. I'm looking at the "Discontinued" status on FastTech and have registered my email address for an update when they're available again.

I'm been looking forward to a summer+winter TPMS system like this for ages, and almost started on a solution myself. I'm much happier that Mark got it working!
 

Roadster

JdeMO Powered
Dec 10, 2016
1,515
1,212
SoCal
Welcome back @S-2000 Roadster! Since we last heard from you, OVMS can now indeed read/write TPMS (for some; me, not so much), 2.5 Base models are now valued at $100K (at least according to Donald Osborne) :confused: and #2500 has been listed for $1MM (originally $1.5MM) :eek:

So what else is left to check? Could it be that my TPMS was upgraded from the Baolong system? Is there a way to check without dismounting the tire?
@markwj / @JohnGarziglia / @Nvbob would love your thoughts on this thx ^^
 

drewski

Supporting Member
Sep 22, 2019
672
394
SF Bay Area
Picked up a multimeter (a Fluke 101) and tested across the correct pins and got continuity then checked adjacent pins on both sides and confirmed no continuity so it seems the jumper is fine.

So what else is left to check? Could it be that my TPMS was upgraded from the Baolong system? Is there a way to check without dismounting the tire?

i would think it unlikely that you have different TPMS hardware as that would most likely need firmware changes to work
 

Nvbob

Roadster 1256
May 6, 2009
381
180
Just east of Lake Tahoe, Ca.
@markwj / @JohnGarziglia / @Nvbob would love your thoughts on this thx ^^

ok, my thoughts

1. Car can read temps from sensors. - yes
2. OVMS reads temps from sensors - yes
3. OVMS TPMS "read" command does NOT return sensor id's (ignition on) - yes

Possible solution (?) - go to tire shop and have them use their TPMS scan tool to read the sensor id's and enter them manually for a "tyre set" (create your own name for the set - i.e. summer, winter, mine, default, etc)

I did an internet search to see if a TPMS scan tool would reveal the manufacturer of the sensor along with the ID but was unable to find anything. I also tried to find if the sensor ID would help determine the manufacturer (similar to a MAC address on a computer network card) but was unable to find anything, again.

I can only "assume" from #1 & #2 above, you have OEM (Baolong) sensors because they are working with the OEM TPMS system.

Your thoughts?
 

Roadster

JdeMO Powered
Dec 10, 2016
1,515
1,212
SoCal
@Nvbob - I just went through service records and it appears all four sensors/valves were replaced in 2017 along with a rear Baolong antenna (see service record excerpt below). If the antenna is Baolong, all the sensors should be as well, correct? Is it possible I have a bad PCB? If so, no clue what else to do at this point but perhaps I'll just undo everything and reseat the daughter board.

@markwj anything else left to try?

Screen Shot 2020-08-08 at 11.07.26 PM.png
 
Last edited:

Roadster

JdeMO Powered
Dec 10, 2016
1,515
1,212
SoCal
I disassembled everything, reassembled it and restarted the module. Ran the commands shown below and you can see the results: "tpms read" still throwing the same error msg :(

Out of curiosity, does "tpms status" read from the new TPMS module or is that simply a straight read from the CAN bus? If the prior, does the fact that it's reading pressures and temps mean my module is working as expected? I'm at a loss here I'm afraid. Best case, I've still got something configured wrong that can be addressed easily. Worst case, this was a $25 USD OVMS ornament.

IMG_3383.png
 

markwj

Moderator, Asia Pacific
Apr 10, 2011
4,604
1,219
Hong Kong
I disassembled everything, reassembled it and restarted the module. Ran the commands shown below and you can see the results: "tpms read" still throwing the same error msg

Please eMail me at mark (at) openvehicles (dot) com. Please send me the output of the 'module summary' command on your module (type that in the shell/messages window). We'll work through this step by step. I'll need access to the car remotely, so best to arrange on eMail.

Regards, Mark.
 

markwj

Moderator, Asia Pacific
Apr 10, 2011
4,604
1,219
Hong Kong
I can't believe that I've been away from this forum for so long. Fortunately, I heard about this TPMS upgrade on the OVMS mailing list. I'm looking at the "Discontinued" status on FastTech and have registered my email address for an update when they're available again.

I'm been looking forward to a summer+winter TPMS system like this for ages, and almost started on a solution myself. I'm much happier that Mark got it working!

They should be back in stock at Fasttech today.
 

Roadster

JdeMO Powered
Dec 10, 2016
1,515
1,212
SoCal
I wouldn't have thought so since both systems are independently functioning as expected... but you never know. Let's see what Mark's diagnosis turns up.
Out of curiosity, does "tpms status" read from the new TPMS module or is that simply a straight read from the CAN bus?
I'm still curious about this as well. Thoughts?
 

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top