TPMS Sensors Topic is solved

Post by **ggleavitt** » 29 Jan 2019, 09:22

Have a post on another Volvo centric site but thought to bring the issue over here as well:
Noted UEM error for single sensor signal loss in the '08 a coupld weeks back, car had 09/07 built Schrader 315Mhz sensors (OE PN 30748991) installed so thought to replace all four. Saw some posts on VDO SE10003 Redi-Sensors and thought they were applicable to this vehicle out of the box. Installed the sensors and had a look in UEM, sensor ID does not register after the normal re-learn procedure (drive car for >15 mins at >25mph, let sit for 15mins).

When I go into VIDA, I don't see the sensor serial numbers registering in history or on the screen. Double checked to make sure the installed sensors were in fact 315Mhz, they are. Triggered each sensor and re-drove the car, even disconnected the battery to see if it might clear anything in UEM. No change. All zeros for serial number and pressure in the four boxes, history box on side notes all zeros as last 8-10 received samples. No errors for TPMS in VIDA, no CEL on dash.

Anyone swap out TPMS sensors with something other than OE and get them to register out of the box? Like being able to see the individual serial numbers in VIDA with associated tire pressure, that level of working?

Minimal information in this area, my hope is that once I'm finished I'll be able to promote a plug and play part number solution other than OE ($105 list each).

Post by **ggleavitt** » 07 Feb 2019, 11:46

Moved this back over to Swedespeed. Have a set of Schrader 20156 sensors on order. Can check there when I'm done to see a fully working solution priced at around 50% less than OE.

Post by **ggleavitt** » 10 Jun 2020, 13:08

Tried to edit my old post, adding the Swedespeed link as there are quite a few options in this space for a working TPMS sensor including the $25/ea VDOs which are still on my vehicle (sold the Schrader sensors to another XC90 owner, he's using them today). Turned out I was overthinking the function of the TPMS system, there's a description in the link and there's no real intelligence involved.
https://forums.swedespeed.com/showthrea ... t-question

Masscomguru · Post by **Masscomguru** » 10 Jun 2020, 18:40

Glad to hear they worked. One of mine died, I just ordered 4 to go in with the next set of tires. I currently have rubber stems, these are metal so I am hoping that won’t be an issue.

Post by **xHeart** » 18 Jan 2023, 08:03

ggleavitt wrote: ↑29 Jan 2019, 09:22
When I go into VIDA, I don't see the sensor serial numbers registering in history or on the screen. Double checked to make sure the installed sensors were in fact 315Mhz, they are. Triggered each sensor and re-drove the car, even disconnected the battery to see if it might clear anything in UEM. No change. All zeros for serial number and pressure in the four boxes, history box on side notes all zeros as last 8-10 received samples. No errors for TPMS in VIDA, no CEL on dash.

Anyone swap out TPMS sensors with something other than OE and get them to register out of the box? Like being able to see the individual serial numbers in VIDA with associated tire pressure, that level of working?

I'm getting ready for new tires, therefore exploring aftermarket wheels upgrade 265/45R20 on 20x8.5; your thoughts?

While reading UEM on VIDA to assess the state of tpms sensor, it only shows one ID x89 for all four wheels with tire pressure 224kpa (no MHz data); how will one know which tire has pressure issue, does it matter?

Post by **ggleavitt** » 18 Jan 2023, 08:26

Dunno on wheels, I run "standard" Volvo rims on my vehicles.

Not sure how you're testing TPMS. If you have a tool that can trigger the sensors, trigger one then press the "show data" button in an individual applicable UEM window on VIDA to see if you return a value for ID and pressure. If in the end 4 separate IDs are seen in the VIDA window(s), you're registering in the UEM and you should be good. Then it's a matter of taking a drive and getting the sensors to activate on their own and the systems to pick them up as normal. Yeah, it's a really dumb system. Does not differentiate sensor to wheel position, only wants to see 4 unique IDs consistently over a prescribed collection period and the UEM is happy.

See the Swedespeed link above (has plenty detail). My particular issue ended up being a typo in the tire shop tool for an incorrect frequency (433Mhz vs 315Mhz), coupled with a misunderstanding of how basic the system is.

chitownV · Post by **chitownV** » 19 Jan 2023, 06:52

If you can, read the TPMS sensors in VIDA while driving. I did this, posted in the link provided.

However, if you have original TPMS sensors, it might be prudent to replace them based on the age. General guidelines are a 5-10yr life expectancy from the TPMS sensor batteries. Older sensors and rubber can also break when trying to transfer them from one wheel to another.

Post by **xHeart** » 19 Jan 2023, 13:48

Very helpful!

While most sensors in our cars are connected by wire, ABS for example, TPMS is wireless. Is there a RFID type receiver that passes the data to UEM?

The aftermarket sensor prices are reasonable. Other than Mhz spec, does the direct vs. indirect a decision item when considering replacement?

Here is my VIN search:
SE10006-4PK Rubber Snap-in Stem; 315 MHz; Multi-application Sensor Next Generation REDI-Sensor Replacement

Post by **ggleavitt** » 19 Jan 2023, 17:40

If I'm interpreting your question of “direct” versus “indirect” correctly, the first is a permanent physical sensor interpreting individual tire pressure (with or without a temperature differential) and the second is inferred pressure as a function of individual wheel characteristics (circumference as example).

In the case of our vehicles, they're a self-powered transceiver/sensor assembly versus an interrogator powered RFID “system”- https://en.wikipedia.org/wiki/Radio-fre ... tification.

Here are some technical links on TPMS if you're interested- https://www.digikey.com/en/articles/low ... ng-systems , https://web.wpi.edu/Pubs/E-project/Avai ... d_2015.pdf

I came to a conclusion in the 2019 Swedespeed thread that a whole bunch of sensors will work fine, so long as they're the correct frequency (315 or 433 Mhz) and a standard word output. I have VDO SE10003 on the Sport, Schrader 20156 on the Ocean Race. The Ocean Race is a 2006 so no TMPS but a set of 4 Schrader sensors (same as original Volvo but red instead of green) on eBay was (still is) only $40 plus free shipping. When I had new tires put on in 2021, I added the sensors so I could swap wheels between my vehicles if I wanted. I bought an Autel tool as part of my initial troubleshooting in 2019 so today it’s easy enough when I’m walking one vehicle with the tool to do the other (super lazy I know).

You have VIDA and if you have access to a TPMS tool then get a sensor, open up the UEM window in VIDA, do a trigger and give it a try. If you see a serial number in the TPMS window in VIDA then you're good. The VDO SE10006 for sure will work, I prefer the metal stems myself so went with the SE10003 when it was $25 each. But I know there are tons more out there that'll work.

I wish our TPMS system was more evolved than it is, even a fundamental function such as wheel position differentiation should have been implemented but I’m sure that would have required some wheel specific RF antennas and software to make it work.

edit- circumference (not diameter), VDO were $25 ea.

chitownV · Post by **chitownV** » 19 Jan 2023, 20:27

Good info.

I too went metal stems as you can replace the metal parts & seal later if you need to. I personally ordered from FCP because I read reviews on Amazon that some TPMS sensors would arrive DOA or were fake. Figured, if I pay a little bit more from FCP for sensors that are probably fresher (not sitting on a shelf for years), can replace them for free for any issue, and are not fake, then the price is worth it for not having the hassle.